./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i --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/pthread/triangular-longest-2.i -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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --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 09:03:24,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:03:24,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:03:24,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:03:24,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:03:24,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:03:24,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:03:24,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:03:24,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:03:24,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:03:24,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:03:24,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:03:24,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:03:24,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:03:24,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:03:24,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:03:24,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:03:24,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:03:24,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:03:24,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:03:24,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:03:24,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:03:24,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:03:24,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:03:24,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:03:24,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:03:24,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:03:24,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:03:24,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:03:24,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:03:24,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:03:24,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:03:24,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:03:24,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:03:24,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:03:24,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:03:24,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:03:24,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:03:24,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:03:24,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:03:24,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:03:24,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:03:24,750 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:03:24,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:03:24,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:03:24,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:03:24,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:03:24,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:03:24,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:03:24,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:03:24,754 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:03:24,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:03:24,755 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:03:24,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:03:24,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:03:24,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:03:24,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:03:24,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:03:24,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:03:24,756 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:03:24,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:03:24,757 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:03:24,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:03:24,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:03:24,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:03:24,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:03:24,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:03:24,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:03:24,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:03:24,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:03:24,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:03:24,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:03:24,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:03:24,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:03:24,759 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:03:24,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:03:24,760 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:03:24,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:03:25,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:03:25,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:03:25,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:03:25,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:03:25,076 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:03:25,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2023-09-01 09:03:26,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:03:26,462 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:03:26,464 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2023-09-01 09:03:26,486 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723fc09cd/89a15a969813410e9e5a17d1549e55f6/FLAGb5df8eb43 [2023-09-01 09:03:26,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723fc09cd/89a15a969813410e9e5a17d1549e55f6 [2023-09-01 09:03:26,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:03:26,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:03:26,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:03:26,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:03:26,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:03:26,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:26,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29b318d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26, skipping insertion in model container [2023-09-01 09:03:26,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:26,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:03:26,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:03:26,894 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2023-09-01 09:03:26,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:03:26,906 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:03:26,952 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2023-09-01 09:03:26,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:03:26,986 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:03:26,986 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:03:26,993 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:03:26,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26 WrapperNode [2023-09-01 09:03:26,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:03:26,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:03:26,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:03:26,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:03:27,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,026 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-09-01 09:03:27,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:03:27,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:03:27,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:03:27,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:03:27,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:03:27,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:03:27,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:03:27,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:03:27,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (1/1) ... [2023-09-01 09:03:27,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:03:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:27,102 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 09:03:27,119 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 09:03:27,146 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 09:03:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 09:03:27,147 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 09:03:27,147 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 09:03:27,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 09:03:27,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:03:27,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:03:27,150 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 09:03:27,321 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:03:27,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:03:27,506 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:03:27,510 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:03:27,511 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 09:03:27,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:03:27 BoogieIcfgContainer [2023-09-01 09:03:27,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:03:27,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:03:27,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:03:27,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:03:27,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:03:26" (1/3) ... [2023-09-01 09:03:27,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358044fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:03:27, skipping insertion in model container [2023-09-01 09:03:27,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:03:26" (2/3) ... [2023-09-01 09:03:27,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358044fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:03:27, skipping insertion in model container [2023-09-01 09:03:27,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:03:27" (3/3) ... [2023-09-01 09:03:27,519 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2023-09-01 09:03:27,528 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:03:27,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:03:27,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:03:27,536 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:03:27,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:03:27,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-09-01 09:03:27,686 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-09-01 09:03:27,686 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:03:27,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-09-01 09:03:27,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-09-01 09:03:27,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-09-01 09:03:27,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:03:27,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-09-01 09:03:27,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-09-01 09:03:27,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-09-01 09:03:27,743 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-09-01 09:03:27,743 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:03:27,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-09-01 09:03:27,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-09-01 09:03:29,717 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-09-01 09:03:29,717 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-09-01 09:03:29,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:03:29,734 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;@2e0afef1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:03:29,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 09:03:29,738 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-09-01 09:03:29,739 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:03:29,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:29,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 09:03:29,740 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 09:03:29,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-09-01 09:03:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:29,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115469937] [2023-09-01 09:03:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:29,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:30,107 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 09:03:30,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:30,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115469937] [2023-09-01 09:03:30,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115469937] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:03:30,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:03:30,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:03:30,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648721600] [2023-09-01 09:03:30,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:03:30,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:03:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:03:30,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:03:30,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 124 [2023-09-01 09:03:30,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 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 09:03:30,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:30,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 124 [2023-09-01 09:03:30,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:30,248 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-09-01 09:03:30,249 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:03:30,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-09-01 09:03:30,251 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-09-01 09:03:30,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-09-01 09:03:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:03:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:03:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 245 transitions. [2023-09-01 09:03:30,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939516129032258 [2023-09-01 09:03:30,264 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 245 transitions. [2023-09-01 09:03:30,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 245 transitions. [2023-09-01 09:03:30,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:30,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 245 transitions. [2023-09-01 09:03:30,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 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 09:03:30,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 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 09:03:30,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 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 09:03:30,278 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 245 transitions. [2023-09-01 09:03:30,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-09-01 09:03:30,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:03:30,282 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-09-01 09:03:30,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-09-01 09:03:30,286 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-09-01 09:03:30,287 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-09-01 09:03:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 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 09:03:30,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:30,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:30,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:03:30,288 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 09:03:30,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-09-01 09:03:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:30,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431862097] [2023-09-01 09:03:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:30,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:30,438 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 09:03:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:30,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431862097] [2023-09-01 09:03:30,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431862097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:03:30,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:03:30,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:03:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303330335] [2023-09-01 09:03:30,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:03:30,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:03:30,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:03:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:03:30,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:30,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 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 09:03:30,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:30,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:30,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:30,588 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-09-01 09:03:30,588 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-09-01 09:03:30,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-09-01 09:03:30,593 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-09-01 09:03:30,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-09-01 09:03:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 09:03:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 09:03:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-09-01 09:03:30,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-09-01 09:03:30,599 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-09-01 09:03:30,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-09-01 09:03:30,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:30,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-09-01 09:03:30,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 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 09:03:30,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 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 09:03:30,613 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 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 09:03:30,613 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-09-01 09:03:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-09-01 09:03:30,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:03:30,616 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-09-01 09:03:30,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-09-01 09:03:30,617 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-09-01 09:03:30,618 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-09-01 09:03:30,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 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 09:03:30,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:30,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:30,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:03:30,619 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 09:03:30,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-09-01 09:03:30,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:30,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401656957] [2023-09-01 09:03:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:30,734 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 09:03:30,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:30,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401656957] [2023-09-01 09:03:30,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401656957] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:03:30,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:03:30,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:03:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738620997] [2023-09-01 09:03:30,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:03:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:03:30,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:03:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:03:30,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:30,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 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 09:03:30,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:30,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:30,860 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-09-01 09:03:30,860 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2023-09-01 09:03:30,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 683 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-09-01 09:03:30,863 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-09-01 09:03:30,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-09-01 09:03:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 09:03:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 09:03:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-09-01 09:03:30,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2023-09-01 09:03:30,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-09-01 09:03:30,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-09-01 09:03:30,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:30,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-09-01 09:03:30,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 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 09:03:30,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:30,874 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:30,874 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 413 transitions. [2023-09-01 09:03:30,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-09-01 09:03:30,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 09:03:30,879 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-09-01 09:03:30,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-09-01 09:03:30,880 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-09-01 09:03:30,880 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-09-01 09:03:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 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 09:03:30,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:30,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:30,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:03:30,881 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 09:03:30,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:30,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 1 times [2023-09-01 09:03:30,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:30,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321917693] [2023-09-01 09:03:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:30,990 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 09:03:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:30,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321917693] [2023-09-01 09:03:30,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321917693] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:03:30,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:03:30,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:03:30,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752856733] [2023-09-01 09:03:30,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:03:30,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 09:03:30,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 09:03:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 09:03:31,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:31,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 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 09:03:31,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:31,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:31,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:31,128 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-09-01 09:03:31,129 INFO L131 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2023-09-01 09:03:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 940 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-09-01 09:03:31,131 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-09-01 09:03:31,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-09-01 09:03:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 09:03:31,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 09:03:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-09-01 09:03:31,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737903225806452 [2023-09-01 09:03:31,134 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-09-01 09:03:31,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-09-01 09:03:31,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:31,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-09-01 09:03:31,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 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 09:03:31,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 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 09:03:31,138 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 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 09:03:31,138 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 470 transitions. [2023-09-01 09:03:31,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-09-01 09:03:31,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 09:03:31,144 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-09-01 09:03:31,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-09-01 09:03:31,145 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-09-01 09:03:31,145 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-09-01 09:03:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 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 09:03:31,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:31,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:03:31,146 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 09:03:31,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 2 times [2023-09-01 09:03:31,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101436934] [2023-09-01 09:03:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:31,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:31,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:31,240 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 09:03:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101436934] [2023-09-01 09:03:31,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101436934] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:03:31,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:03:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:03:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114950628] [2023-09-01 09:03:31,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:03:31,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 09:03:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 09:03:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-09-01 09:03:31,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:31,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 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 09:03:31,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:31,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:31,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:31,370 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2023-09-01 09:03:31,371 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-09-01 09:03:31,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 926 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-09-01 09:03:31,373 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-09-01 09:03:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-09-01 09:03:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 09:03:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 09:03:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 411 transitions. [2023-09-01 09:03:31,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735023041474654 [2023-09-01 09:03:31,375 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 411 transitions. [2023-09-01 09:03:31,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 411 transitions. [2023-09-01 09:03:31,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:31,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 411 transitions. [2023-09-01 09:03:31,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 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 09:03:31,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:31,378 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 09:03:31,379 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 411 transitions. [2023-09-01 09:03:31,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-09-01 09:03:31,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 09:03:31,385 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-09-01 09:03:31,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-09-01 09:03:31,386 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-09-01 09:03:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-09-01 09:03:31,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 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 09:03:31,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:31,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:31,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:03:31,387 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 09:03:31,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1494024432, now seen corresponding path program 3 times [2023-09-01 09:03:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:31,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005683723] [2023-09-01 09:03:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:31,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:31,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:31,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005683723] [2023-09-01 09:03:31,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005683723] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589744922] [2023-09-01 09:03:31,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 09:03:31,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:31,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:31,493 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 09:03:31,522 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 09:03:31,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 09:03:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:31,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 09:03:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:31,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589744922] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:31,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 09:03:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786217617] [2023-09-01 09:03:31,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:31,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 09:03:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:31,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 09:03:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 09:03:31,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:31,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 54.916666666666664) internal successors, (659), 12 states have internal predecessors, (659), 0 states have call successors, (0), 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 09:03:31,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:31,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:31,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:32,114 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2023-09-01 09:03:32,115 INFO L131 PetriNetUnfolder]: For 2205/2205 co-relation queries the response was YES. [2023-09-01 09:03:32,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1197 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-09-01 09:03:32,118 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2023-09-01 09:03:32,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2023-09-01 09:03:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 09:03:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 09:03:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 816 transitions. [2023-09-01 09:03:32,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2023-09-01 09:03:32,124 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 816 transitions. [2023-09-01 09:03:32,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 816 transitions. [2023-09-01 09:03:32,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:32,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 816 transitions. [2023-09-01 09:03:32,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.285714285714285) internal successors, (816), 14 states have internal predecessors, (816), 0 states have call successors, (0), 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 09:03:32,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 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 09:03:32,131 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 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 09:03:32,132 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 816 transitions. [2023-09-01 09:03:32,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2023-09-01 09:03:32,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-09-01 09:03:32,140 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2023-09-01 09:03:32,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-09-01 09:03:32,143 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2023-09-01 09:03:32,143 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2023-09-01 09:03:32,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.916666666666664) internal successors, (659), 12 states have internal predecessors, (659), 0 states have call successors, (0), 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 09:03:32,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:32,144 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:32,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 09:03:32,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 09:03:32,350 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 09:03:32,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash 976616748, now seen corresponding path program 4 times [2023-09-01 09:03:32,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:32,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061763076] [2023-09-01 09:03:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061763076] [2023-09-01 09:03:32,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061763076] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867936257] [2023-09-01 09:03:32,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 09:03:32,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:32,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:32,530 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 09:03:32,543 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 09:03:32,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 09:03:32,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 09:03:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:32,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:32,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867936257] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:32,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 09:03:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361281721] [2023-09-01 09:03:32,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:32,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 09:03:32,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 09:03:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-09-01 09:03:32,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:32,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 0 states have call successors, (0), 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 09:03:32,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:32,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:32,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:33,155 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2023-09-01 09:03:33,155 INFO L131 PetriNetUnfolder]: For 4313/4313 co-relation queries the response was YES. [2023-09-01 09:03:33,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1664 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2023-09-01 09:03:33,159 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-09-01 09:03:33,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2023-09-01 09:03:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 09:03:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 09:03:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-09-01 09:03:33,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692540322580645 [2023-09-01 09:03:33,162 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-09-01 09:03:33,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-09-01 09:03:33,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:33,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-09-01 09:03:33,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 0 states have call successors, (0), 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 09:03:33,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 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 09:03:33,169 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 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 09:03:33,169 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 931 transitions. [2023-09-01 09:03:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2023-09-01 09:03:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-09-01 09:03:33,184 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2023-09-01 09:03:33,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-09-01 09:03:33,185 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-09-01 09:03:33,185 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2023-09-01 09:03:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 0 states have call successors, (0), 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 09:03:33,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:33,186 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:33,194 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 09:03:33,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-09-01 09:03:33,392 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 09:03:33,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 921314670, now seen corresponding path program 5 times [2023-09-01 09:03:33,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215602244] [2023-09-01 09:03:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215602244] [2023-09-01 09:03:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215602244] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:33,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842023013] [2023-09-01 09:03:33,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 09:03:33,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:33,535 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 09:03:33,538 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 09:03:33,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 09:03:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 09:03:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:33,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842023013] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:33,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 09:03:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339679543] [2023-09-01 09:03:33,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 09:03:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 09:03:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-09-01 09:03:33,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:33,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 0 states have call successors, (0), 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 09:03:33,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:33,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:33,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:34,375 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2023-09-01 09:03:34,375 INFO L131 PetriNetUnfolder]: For 12149/12149 co-relation queries the response was YES. [2023-09-01 09:03:34,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12149/12149 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3350 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2023-09-01 09:03:34,382 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-09-01 09:03:34,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2023-09-01 09:03:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 09:03:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 09:03:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-09-01 09:03:34,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46920821114369504 [2023-09-01 09:03:34,386 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-09-01 09:03:34,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-09-01 09:03:34,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:34,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-09-01 09:03:34,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.18181818181818) internal successors, (1280), 22 states have internal predecessors, (1280), 0 states have call successors, (0), 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 09:03:34,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 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 09:03:34,393 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 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 09:03:34,394 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1280 transitions. [2023-09-01 09:03:34,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2023-09-01 09:03:34,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-09-01 09:03:34,448 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2023-09-01 09:03:34,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-09-01 09:03:34,449 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-09-01 09:03:34,449 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2023-09-01 09:03:34,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 0 states have call successors, (0), 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 09:03:34,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:34,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:34,463 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 09:03:34,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:34,660 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 09:03:34,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1348503086, now seen corresponding path program 6 times [2023-09-01 09:03:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:34,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097690974] [2023-09-01 09:03:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:34,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:34,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097690974] [2023-09-01 09:03:34,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097690974] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:34,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488208109] [2023-09-01 09:03:34,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 09:03:34,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:34,793 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 09:03:34,816 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 09:03:34,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 09:03:34,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 09:03:34,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:34,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488208109] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:34,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:34,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 09:03:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923100609] [2023-09-01 09:03:34,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 09:03:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 09:03:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-09-01 09:03:35,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:35,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 0 states have call successors, (0), 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 09:03:35,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:35,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:35,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:35,603 INFO L130 PetriNetUnfolder]: 612/1111 cut-off events. [2023-09-01 09:03:35,603 INFO L131 PetriNetUnfolder]: For 38046/38046 co-relation queries the response was YES. [2023-09-01 09:03:35,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 38046/38046 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5398 event pairs, 30 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2023-09-01 09:03:35,616 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-09-01 09:03:35,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2023-09-01 09:03:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 09:03:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 09:03:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1571 transitions. [2023-09-01 09:03:35,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692353643966547 [2023-09-01 09:03:35,621 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1571 transitions. [2023-09-01 09:03:35,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1571 transitions. [2023-09-01 09:03:35,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:35,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1571 transitions. [2023-09-01 09:03:35,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.18518518518518) internal successors, (1571), 27 states have internal predecessors, (1571), 0 states have call successors, (0), 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 09:03:35,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 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 09:03:35,631 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 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 09:03:35,631 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1571 transitions. [2023-09-01 09:03:35,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2023-09-01 09:03:35,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2023-09-01 09:03:35,720 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2023-09-01 09:03:35,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-09-01 09:03:35,721 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-09-01 09:03:35,721 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2023-09-01 09:03:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 0 states have call successors, (0), 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 09:03:35,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:35,722 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:35,730 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 09:03:35,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:35,930 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 09:03:35,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1579002867, now seen corresponding path program 7 times [2023-09-01 09:03:35,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:35,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343671805] [2023-09-01 09:03:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:36,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:36,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343671805] [2023-09-01 09:03:36,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343671805] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:36,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509893038] [2023-09-01 09:03:36,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 09:03:36,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:36,044 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 09:03:36,068 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 09:03:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 09:03:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:36,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:03:36,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509893038] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:36,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:36,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-09-01 09:03:36,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856396798] [2023-09-01 09:03:36,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:36,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 09:03:36,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 09:03:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-09-01 09:03:36,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:36,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 states have internal predecessors, (985), 0 states have call successors, (0), 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 09:03:36,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:36,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:36,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:37,140 INFO L130 PetriNetUnfolder]: 756/1375 cut-off events. [2023-09-01 09:03:37,141 INFO L131 PetriNetUnfolder]: For 84547/84547 co-relation queries the response was YES. [2023-09-01 09:03:37,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 84547/84547 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6872 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2023-09-01 09:03:37,158 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2023-09-01 09:03:37,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2023-09-01 09:03:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 09:03:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 09:03:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1744 transitions. [2023-09-01 09:03:37,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46881720430107526 [2023-09-01 09:03:37,162 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1744 transitions. [2023-09-01 09:03:37,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1744 transitions. [2023-09-01 09:03:37,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:37,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1744 transitions. [2023-09-01 09:03:37,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.13333333333333) internal successors, (1744), 30 states have internal predecessors, (1744), 0 states have call successors, (0), 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 09:03:37,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 124.0) internal successors, (3844), 31 states have internal predecessors, (3844), 0 states have call successors, (0), 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 09:03:37,171 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 124.0) internal successors, (3844), 31 states have internal predecessors, (3844), 0 states have call successors, (0), 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 09:03:37,172 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 1744 transitions. [2023-09-01 09:03:37,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2023-09-01 09:03:37,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2023-09-01 09:03:37,361 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2023-09-01 09:03:37,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2023-09-01 09:03:37,363 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2023-09-01 09:03:37,363 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2023-09-01 09:03:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 states have internal predecessors, (985), 0 states have call successors, (0), 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 09:03:37,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:37,364 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:37,370 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 09:03:37,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 09:03:37,570 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 09:03:37,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -513553686, now seen corresponding path program 8 times [2023-09-01 09:03:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085122380] [2023-09-01 09:03:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:37,827 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 09:03:37,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:37,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085122380] [2023-09-01 09:03:37,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085122380] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:37,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210186181] [2023-09-01 09:03:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 09:03:37,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:37,829 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 09:03:37,831 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 09:03:37,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 09:03:37,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:37,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 09:03:37,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:37,993 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 09:03:37,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:38,236 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 09:03:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210186181] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:38,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:38,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2023-09-01 09:03:38,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372639912] [2023-09-01 09:03:38,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:38,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 09:03:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 09:03:38,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2023-09-01 09:03:38,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:38,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 31 states, 31 states have (on average 54.354838709677416) internal successors, (1685), 31 states have internal predecessors, (1685), 0 states have call successors, (0), 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 09:03:38,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:38,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:38,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:39,764 INFO L130 PetriNetUnfolder]: 940/1683 cut-off events. [2023-09-01 09:03:39,764 INFO L131 PetriNetUnfolder]: For 117881/117881 co-relation queries the response was YES. [2023-09-01 09:03:39,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16451 conditions, 1683 events. 940/1683 cut-off events. For 117881/117881 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7975 event pairs, 18 based on Foata normal form. 52/1735 useless extension candidates. Maximal degree in co-relation 16366. Up to 574 conditions per place. [2023-09-01 09:03:39,788 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 90 selfloop transitions, 222 changer transitions 98/410 dead transitions. [2023-09-01 09:03:39,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 8862 flow [2023-09-01 09:03:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 09:03:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 09:03:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3014 transitions. [2023-09-01 09:03:39,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4674317617866005 [2023-09-01 09:03:39,795 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3014 transitions. [2023-09-01 09:03:39,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3014 transitions. [2023-09-01 09:03:39,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:39,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3014 transitions. [2023-09-01 09:03:39,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.96153846153846) internal successors, (3014), 52 states have internal predecessors, (3014), 0 states have call successors, (0), 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 09:03:39,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 124.0) internal successors, (6572), 53 states have internal predecessors, (6572), 0 states have call successors, (0), 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 09:03:39,812 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 124.0) internal successors, (6572), 53 states have internal predecessors, (6572), 0 states have call successors, (0), 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 09:03:39,812 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 52 states and 3014 transitions. [2023-09-01 09:03:39,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 8862 flow [2023-09-01 09:03:40,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 410 transitions, 7981 flow, removed 412 selfloop flow, removed 8 redundant places. [2023-09-01 09:03:40,050 INFO L231 Difference]: Finished difference. Result has 255 places, 248 transitions, 5156 flow [2023-09-01 09:03:40,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5156, PETRI_PLACES=255, PETRI_TRANSITIONS=248} [2023-09-01 09:03:40,051 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 237 predicate places. [2023-09-01 09:03:40,051 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 248 transitions, 5156 flow [2023-09-01 09:03:40,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.354838709677416) internal successors, (1685), 31 states have internal predecessors, (1685), 0 states have call successors, (0), 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 09:03:40,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:40,052 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:40,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 09:03:40,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:40,258 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 09:03:40,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -672099493, now seen corresponding path program 9 times [2023-09-01 09:03:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398892503] [2023-09-01 09:03:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:40,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:40,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398892503] [2023-09-01 09:03:40,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398892503] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:40,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253649274] [2023-09-01 09:03:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 09:03:40,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:40,757 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 09:03:40,760 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 09:03:40,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-09-01 09:03:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 09:03:40,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:40,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:41,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253649274] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:41,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:41,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-09-01 09:03:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103408852] [2023-09-01 09:03:41,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:41,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-09-01 09:03:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-09-01 09:03:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2023-09-01 09:03:41,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:41,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 248 transitions, 5156 flow. Second operand has 50 states, 50 states have (on average 54.2) internal successors, (2710), 50 states have internal predecessors, (2710), 0 states have call successors, (0), 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 09:03:41,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:41,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:41,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:43,539 INFO L130 PetriNetUnfolder]: 1300/2403 cut-off events. [2023-09-01 09:03:43,539 INFO L131 PetriNetUnfolder]: For 323719/323719 co-relation queries the response was YES. [2023-09-01 09:03:43,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31690 conditions, 2403 events. 1300/2403 cut-off events. For 323719/323719 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12185 event pairs, 236 based on Foata normal form. 72/2475 useless extension candidates. Maximal degree in co-relation 31579. Up to 993 conditions per place. [2023-09-01 09:03:43,584 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 219 selfloop transitions, 179 changer transitions 103/501 dead transitions. [2023-09-01 09:03:43,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 501 transitions, 14353 flow [2023-09-01 09:03:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-09-01 09:03:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-09-01 09:03:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3109 transitions. [2023-09-01 09:03:43,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46430704898446834 [2023-09-01 09:03:43,589 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3109 transitions. [2023-09-01 09:03:43,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3109 transitions. [2023-09-01 09:03:43,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:43,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3109 transitions. [2023-09-01 09:03:43,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.574074074074076) internal successors, (3109), 54 states have internal predecessors, (3109), 0 states have call successors, (0), 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 09:03:43,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 124.0) internal successors, (6820), 55 states have internal predecessors, (6820), 0 states have call successors, (0), 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 09:03:43,603 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 124.0) internal successors, (6820), 55 states have internal predecessors, (6820), 0 states have call successors, (0), 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 09:03:43,603 INFO L175 Difference]: Start difference. First operand has 255 places, 248 transitions, 5156 flow. Second operand 54 states and 3109 transitions. [2023-09-01 09:03:43,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 501 transitions, 14353 flow [2023-09-01 09:03:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 501 transitions, 11122 flow, removed 1538 selfloop flow, removed 16 redundant places. [2023-09-01 09:03:44,307 INFO L231 Difference]: Finished difference. Result has 316 places, 340 transitions, 6942 flow [2023-09-01 09:03:44,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6942, PETRI_PLACES=316, PETRI_TRANSITIONS=340} [2023-09-01 09:03:44,309 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 298 predicate places. [2023-09-01 09:03:44,309 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 340 transitions, 6942 flow [2023-09-01 09:03:44,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 54.2) internal successors, (2710), 50 states have internal predecessors, (2710), 0 states have call successors, (0), 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 09:03:44,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:44,310 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:44,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 09:03:44,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:44,521 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 09:03:44,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash 499642727, now seen corresponding path program 10 times [2023-09-01 09:03:44,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:44,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118999854] [2023-09-01 09:03:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:44,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:44,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:44,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118999854] [2023-09-01 09:03:44,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118999854] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:44,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255656432] [2023-09-01 09:03:44,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 09:03:44,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:44,981 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 09:03:45,000 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 09:03:45,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 09:03:45,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 09:03:45,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:45,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:45,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255656432] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:45,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:45,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-09-01 09:03:45,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711473822] [2023-09-01 09:03:45,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:45,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-09-01 09:03:45,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-09-01 09:03:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2023-09-01 09:03:45,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:45,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 340 transitions, 6942 flow. Second operand has 51 states, 51 states have (on average 54.23529411764706) internal successors, (2766), 51 states have internal predecessors, (2766), 0 states have call successors, (0), 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 09:03:45,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:45,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:45,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:48,570 INFO L130 PetriNetUnfolder]: 1632/3063 cut-off events. [2023-09-01 09:03:48,571 INFO L131 PetriNetUnfolder]: For 708353/708353 co-relation queries the response was YES. [2023-09-01 09:03:48,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45122 conditions, 3063 events. 1632/3063 cut-off events. For 708353/708353 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 16234 event pairs, 72 based on Foata normal form. 72/3135 useless extension candidates. Maximal degree in co-relation 44986. Up to 1246 conditions per place. [2023-09-01 09:03:48,619 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 131 selfloop transitions, 361 changer transitions 123/615 dead transitions. [2023-09-01 09:03:48,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 615 transitions, 16914 flow [2023-09-01 09:03:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 09:03:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 09:03:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3692 transitions. [2023-09-01 09:03:48,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652217741935484 [2023-09-01 09:03:48,626 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3692 transitions. [2023-09-01 09:03:48,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3692 transitions. [2023-09-01 09:03:48,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:48,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3692 transitions. [2023-09-01 09:03:48,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.6875) internal successors, (3692), 64 states have internal predecessors, (3692), 0 states have call successors, (0), 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 09:03:48,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 124.0) internal successors, (8060), 65 states have internal predecessors, (8060), 0 states have call successors, (0), 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 09:03:48,644 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 124.0) internal successors, (8060), 65 states have internal predecessors, (8060), 0 states have call successors, (0), 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 09:03:48,644 INFO L175 Difference]: Start difference. First operand has 316 places, 340 transitions, 6942 flow. Second operand 64 states and 3692 transitions. [2023-09-01 09:03:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 615 transitions, 16914 flow [2023-09-01 09:03:49,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 615 transitions, 15212 flow, removed 784 selfloop flow, removed 21 redundant places. [2023-09-01 09:03:49,959 INFO L231 Difference]: Finished difference. Result has 379 places, 425 transitions, 9430 flow [2023-09-01 09:03:49,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=9430, PETRI_PLACES=379, PETRI_TRANSITIONS=425} [2023-09-01 09:03:49,960 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 361 predicate places. [2023-09-01 09:03:49,960 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 425 transitions, 9430 flow [2023-09-01 09:03:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 54.23529411764706) internal successors, (2766), 51 states have internal predecessors, (2766), 0 states have call successors, (0), 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 09:03:49,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:49,961 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:49,971 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 09:03:50,167 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,SelfDestructingSolverStorable12 [2023-09-01 09:03:50,167 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 09:03:50,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash -954991693, now seen corresponding path program 11 times [2023-09-01 09:03:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:50,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806593565] [2023-09-01 09:03:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:50,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:50,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806593565] [2023-09-01 09:03:50,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806593565] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:50,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065180391] [2023-09-01 09:03:50,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 09:03:50,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:50,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:50,648 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 09:03:50,652 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 09:03:50,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-09-01 09:03:50,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 09:03:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065180391] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:51,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-09-01 09:03:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289245493] [2023-09-01 09:03:51,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-09-01 09:03:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-09-01 09:03:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2023-09-01 09:03:51,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:51,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 425 transitions, 9430 flow. Second operand has 51 states, 51 states have (on average 54.23529411764706) internal successors, (2766), 51 states have internal predecessors, (2766), 0 states have call successors, (0), 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 09:03:51,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:51,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:51,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:03:54,990 INFO L130 PetriNetUnfolder]: 1988/3695 cut-off events. [2023-09-01 09:03:54,990 INFO L131 PetriNetUnfolder]: For 1289952/1289952 co-relation queries the response was YES. [2023-09-01 09:03:55,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64940 conditions, 3695 events. 1988/3695 cut-off events. For 1289952/1289952 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 19523 event pairs, 10 based on Foata normal form. 84/3779 useless extension candidates. Maximal degree in co-relation 64793. Up to 1514 conditions per place. [2023-09-01 09:03:55,046 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 119 selfloop transitions, 486 changer transitions 161/766 dead transitions. [2023-09-01 09:03:55,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 766 transitions, 25506 flow [2023-09-01 09:03:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-09-01 09:03:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-09-01 09:03:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4855 transitions. [2023-09-01 09:03:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46610983102918585 [2023-09-01 09:03:55,068 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4855 transitions. [2023-09-01 09:03:55,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4855 transitions. [2023-09-01 09:03:55,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:03:55,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4855 transitions. [2023-09-01 09:03:55,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 57.79761904761905) internal successors, (4855), 84 states have internal predecessors, (4855), 0 states have call successors, (0), 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 09:03:55,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 124.0) internal successors, (10540), 85 states have internal predecessors, (10540), 0 states have call successors, (0), 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 09:03:55,092 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 124.0) internal successors, (10540), 85 states have internal predecessors, (10540), 0 states have call successors, (0), 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 09:03:55,093 INFO L175 Difference]: Start difference. First operand has 379 places, 425 transitions, 9430 flow. Second operand 84 states and 4855 transitions. [2023-09-01 09:03:55,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 766 transitions, 25506 flow [2023-09-01 09:03:57,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 766 transitions, 22525 flow, removed 1302 selfloop flow, removed 25 redundant places. [2023-09-01 09:03:57,381 INFO L231 Difference]: Finished difference. Result has 471 places, 516 transitions, 13279 flow [2023-09-01 09:03:57,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=13279, PETRI_PLACES=471, PETRI_TRANSITIONS=516} [2023-09-01 09:03:57,382 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 453 predicate places. [2023-09-01 09:03:57,382 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 516 transitions, 13279 flow [2023-09-01 09:03:57,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 54.23529411764706) internal successors, (2766), 51 states have internal predecessors, (2766), 0 states have call successors, (0), 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 09:03:57,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:03:57,383 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:03:57,393 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 09:03:57,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 09:03:57,589 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 09:03:57,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:03:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash -193875302, now seen corresponding path program 12 times [2023-09-01 09:03:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:03:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395253807] [2023-09-01 09:03:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:03:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:03:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:03:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:03:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395253807] [2023-09-01 09:03:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395253807] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:03:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913545981] [2023-09-01 09:03:58,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 09:03:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:03:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:03:58,257 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 09:03:58,284 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 09:03:58,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-09-01 09:03:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:03:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 09:03:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:03:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:58,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:03:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:03:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913545981] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:03:59,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:03:59,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2023-09-01 09:03:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813764086] [2023-09-01 09:03:59,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:03:59,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-09-01 09:03:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:03:59,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-09-01 09:03:59,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=3901, Unknown=0, NotChecked=0, Total=5112 [2023-09-01 09:03:59,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:03:59,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 516 transitions, 13279 flow. Second operand has 72 states, 72 states have (on average 54.138888888888886) internal successors, (3898), 72 states have internal predecessors, (3898), 0 states have call successors, (0), 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 09:03:59,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:03:59,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:03:59,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:04:03,323 INFO L130 PetriNetUnfolder]: 2388/4423 cut-off events. [2023-09-01 09:04:03,323 INFO L131 PetriNetUnfolder]: For 2531362/2531362 co-relation queries the response was YES. [2023-09-01 09:04:03,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97549 conditions, 4423 events. 2388/4423 cut-off events. For 2531362/2531362 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 23548 event pairs, 22 based on Foata normal form. 48/4471 useless extension candidates. Maximal degree in co-relation 97367. Up to 1818 conditions per place. [2023-09-01 09:04:03,402 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 146 selfloop transitions, 582 changer transitions 167/895 dead transitions. [2023-09-01 09:04:03,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 895 transitions, 35696 flow [2023-09-01 09:04:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-09-01 09:04:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-09-01 09:04:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 5197 transitions. [2023-09-01 09:04:03,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568100358422937 [2023-09-01 09:04:03,408 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 5197 transitions. [2023-09-01 09:04:03,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 5197 transitions. [2023-09-01 09:04:03,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:04:03,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 5197 transitions. [2023-09-01 09:04:03,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 57.74444444444445) internal successors, (5197), 90 states have internal predecessors, (5197), 0 states have call successors, (0), 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 09:04:03,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 124.0) internal successors, (11284), 91 states have internal predecessors, (11284), 0 states have call successors, (0), 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 09:04:03,429 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 124.0) internal successors, (11284), 91 states have internal predecessors, (11284), 0 states have call successors, (0), 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 09:04:03,429 INFO L175 Difference]: Start difference. First operand has 471 places, 516 transitions, 13279 flow. Second operand 90 states and 5197 transitions. [2023-09-01 09:04:03,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 895 transitions, 35696 flow [2023-09-01 09:04:08,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 895 transitions, 28082 flow, removed 3567 selfloop flow, removed 30 redundant places. [2023-09-01 09:04:08,940 INFO L231 Difference]: Finished difference. Result has 552 places, 614 transitions, 14996 flow [2023-09-01 09:04:08,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=14996, PETRI_PLACES=552, PETRI_TRANSITIONS=614} [2023-09-01 09:04:08,941 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 534 predicate places. [2023-09-01 09:04:08,941 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 614 transitions, 14996 flow [2023-09-01 09:04:08,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 54.138888888888886) internal successors, (3898), 72 states have internal predecessors, (3898), 0 states have call successors, (0), 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 09:04:08,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:08,942 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:04:08,955 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 09:04:09,147 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,SelfDestructingSolverStorable14 [2023-09-01 09:04:09,148 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 09:04:09,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 432945037, now seen corresponding path program 13 times [2023-09-01 09:04:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:09,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310033186] [2023-09-01 09:04:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:04:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:04:10,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:04:10,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310033186] [2023-09-01 09:04:10,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310033186] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:04:10,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488382554] [2023-09-01 09:04:10,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 09:04:10,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:04:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:04:10,009 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 09:04:10,036 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 09:04:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:04:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 09:04:10,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:04:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:04:10,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:04:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:04:11,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488382554] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:04:11,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:04:11,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 81 [2023-09-01 09:04:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045246011] [2023-09-01 09:04:11,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:04:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-09-01 09:04:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:04:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-09-01 09:04:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=5231, Unknown=0, NotChecked=0, Total=6806 [2023-09-01 09:04:11,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:04:11,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 614 transitions, 14996 flow. Second operand has 83 states, 83 states have (on average 54.13253012048193) internal successors, (4493), 83 states have internal predecessors, (4493), 0 states have call successors, (0), 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 09:04:11,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:04:11,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:04:11,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:04:15,452 INFO L130 PetriNetUnfolder]: 2468/4559 cut-off events. [2023-09-01 09:04:15,452 INFO L131 PetriNetUnfolder]: For 3165113/3165113 co-relation queries the response was YES. [2023-09-01 09:04:15,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106216 conditions, 4559 events. 2468/4559 cut-off events. For 3165113/3165113 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 24127 event pairs, 32 based on Foata normal form. 8/4567 useless extension candidates. Maximal degree in co-relation 106013. Up to 1858 conditions per place. [2023-09-01 09:04:15,546 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 135 selfloop transitions, 589 changer transitions 158/882 dead transitions. [2023-09-01 09:04:15,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 882 transitions, 32597 flow [2023-09-01 09:04:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-09-01 09:04:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-09-01 09:04:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4728 transitions. [2023-09-01 09:04:15,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46498819826907944 [2023-09-01 09:04:15,552 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4728 transitions. [2023-09-01 09:04:15,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4728 transitions. [2023-09-01 09:04:15,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:04:15,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4728 transitions. [2023-09-01 09:04:15,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 57.65853658536585) internal successors, (4728), 82 states have internal predecessors, (4728), 0 states have call successors, (0), 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 09:04:15,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 124.0) internal successors, (10292), 83 states have internal predecessors, (10292), 0 states have call successors, (0), 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 09:04:15,571 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 124.0) internal successors, (10292), 83 states have internal predecessors, (10292), 0 states have call successors, (0), 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 09:04:15,572 INFO L175 Difference]: Start difference. First operand has 552 places, 614 transitions, 14996 flow. Second operand 82 states and 4728 transitions. [2023-09-01 09:04:15,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 882 transitions, 32597 flow [2023-09-01 09:04:21,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 882 transitions, 26739 flow, removed 2563 selfloop flow, removed 49 redundant places. [2023-09-01 09:04:21,607 INFO L231 Difference]: Finished difference. Result has 592 places, 634 transitions, 13045 flow [2023-09-01 09:04:21,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=11058, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=13045, PETRI_PLACES=592, PETRI_TRANSITIONS=634} [2023-09-01 09:04:21,608 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 574 predicate places. [2023-09-01 09:04:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 634 transitions, 13045 flow [2023-09-01 09:04:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 54.13253012048193) internal successors, (4493), 83 states have internal predecessors, (4493), 0 states have call successors, (0), 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 09:04:21,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:21,609 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:04:21,614 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 09:04:21,809 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,SelfDestructingSolverStorable15 [2023-09-01 09:04:21,810 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 09:04:21,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1412676792, now seen corresponding path program 14 times [2023-09-01 09:04:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628928828] [2023-09-01 09:04:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:21,834 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:21,877 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:21,877 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:21,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 09:04:21,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 09:04:21,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 09:04:21,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:04:21,881 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2023-09-01 09:04:21,885 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:04:21,885 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:04:21,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:04:21 BasicIcfg [2023-09-01 09:04:21,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:04:21,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:04:21,938 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:04:21,938 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:04:21,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:03:27" (3/4) ... [2023-09-01 09:04:21,940 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-09-01 09:04:22,016 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:04:22,016 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:04:22,017 INFO L158 Benchmark]: Toolchain (without parser) took 55509.00ms. Allocated memory was 69.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 43.1MB in the beginning and 1.8GB in the end (delta: -1.8GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2023-09-01 09:04:22,017 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:04:22,017 INFO L158 Benchmark]: CACSL2BoogieTranslator took 482.22ms. Allocated memory is still 69.2MB. Free memory was 42.9MB in the beginning and 40.9MB in the end (delta: 2.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 09:04:22,018 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.72ms. Allocated memory is still 69.2MB. Free memory was 40.9MB in the beginning and 39.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:04:22,018 INFO L158 Benchmark]: Boogie Preprocessor took 38.44ms. Allocated memory is still 69.2MB. Free memory was 39.1MB in the beginning and 37.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:04:22,018 INFO L158 Benchmark]: RCFGBuilder took 446.34ms. Allocated memory is still 69.2MB. Free memory was 37.6MB in the beginning and 45.1MB in the end (delta: -7.5MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2023-09-01 09:04:22,019 INFO L158 Benchmark]: TraceAbstraction took 54423.68ms. Allocated memory was 69.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 44.3MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2023-09-01 09:04:22,019 INFO L158 Benchmark]: Witness Printer took 78.42ms. Allocated memory is still 2.5GB. Free memory was 1.2GB in the beginning and 1.8GB in the end (delta: -582.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-09-01 09:04:22,020 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 56.6MB. Free memory is still 34.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 482.22ms. Allocated memory is still 69.2MB. Free memory was 42.9MB in the beginning and 40.9MB in the end (delta: 2.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.72ms. Allocated memory is still 69.2MB. Free memory was 40.9MB in the beginning and 39.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.44ms. Allocated memory is still 69.2MB. Free memory was 39.1MB in the beginning and 37.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 446.34ms. Allocated memory is still 69.2MB. Free memory was 37.6MB in the beginning and 45.1MB in the end (delta: -7.5MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * TraceAbstraction took 54423.68ms. Allocated memory was 69.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 44.3MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Witness Printer took 78.42ms. Allocated memory is still 2.5GB. Free memory was 1.2GB in the beginning and 1.8GB in the end (delta: -582.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=19] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L719] 0 int condJ = j >= (2*20 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=20, k=20] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 54.3s, OverallIterations: 17, TraceHistogramMax: 20, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 38.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8236 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8145 mSDsluCounter, 1354 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1343 mSDsCounter, 775 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6310 IncrementalHoareTripleChecker+Invalid, 7085 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 775 mSolverCounterUnsat, 11 mSDtfsCounter, 6310 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1217 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 909 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30376 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14996occurred in iteration=15, InterpolantAutomatonStates: 567, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 620 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 3351 SizeOfPredicates, 173 NumberOfNonLiveVariables, 2095 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 38 InterpolantComputations, 5 PerfectInterpolantSequences, 12/2967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-09-01 09:04:22,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE