./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:49:38,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:49:38,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:49:38,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:49:38,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:49:38,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:49:38,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:49:38,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:49:38,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:49:38,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:49:38,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:49:38,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:49:38,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:49:38,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:49:38,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:49:38,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:49:38,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:49:38,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:49:38,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:49:38,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:49:38,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:49:38,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:49:38,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:49:38,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:49:38,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:49:38,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:49:38,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:49:38,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:49:38,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:49:38,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:49:38,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:49:38,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:49:38,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:49:38,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:49:38,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:49:38,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:49:38,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:49:38,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:49:38,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:49:38,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:49:38,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:49:38,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:49:38,588 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:49:38,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:49:38,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:49:38,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:49:38,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:49:38,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:49:38,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:49:38,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:49:38,594 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:49:38,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:49:38,595 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:49:38,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:49:38,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:49:38,596 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:49:38,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:49:38,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:49:38,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:49:38,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:49:38,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:49:38,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:49:38,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:49:38,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:49:38,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:49:38,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:49:38,598 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:49:38,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:49:38,599 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:49:38,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:49:38,599 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:49:38,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:49:38,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:49:38,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:49:38,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:49:38,857 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:49:38,857 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:49:38,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-31 03:49:39,926 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:49:40,142 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:49:40,143 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-08-31 03:49:40,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/888a49482/3d652ac974df468fb9a03fa490e99cd9/FLAGf47b37f3c [2023-08-31 03:49:40,161 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/888a49482/3d652ac974df468fb9a03fa490e99cd9 [2023-08-31 03:49:40,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:49:40,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:49:40,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:49:40,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:49:40,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:49:40,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db2c960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40, skipping insertion in model container [2023-08-31 03:49:40,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:49:40,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:49:40,307 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2023-08-31 03:49:40,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:49:40,317 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:49:40,347 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2023-08-31 03:49:40,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:49:40,354 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:49:40,354 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:49:40,358 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:49:40,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40 WrapperNode [2023-08-31 03:49:40,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:49:40,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:49:40,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:49:40,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:49:40,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,404 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 124 [2023-08-31 03:49:40,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:49:40,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:49:40,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:49:40,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:49:40,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:49:40,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:49:40,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:49:40,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:49:40,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (1/1) ... [2023-08-31 03:49:40,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:49:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:40,484 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) [2023-08-31 03:49:40,506 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 [2023-08-31 03:49:40,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:49:40,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:49:40,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:49:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:49:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:49:40,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:49:40,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:49:40,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:49:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 03:49:40,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 03:49:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:49:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:49:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:49:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 03:49:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:49:40,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:49:40,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:49:40,526 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:49:40,620 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:49:40,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:49:40,902 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:49:40,920 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:49:40,921 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-31 03:49:40,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:49:40 BoogieIcfgContainer [2023-08-31 03:49:40,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:49:40,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:49:40,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:49:40,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:49:40,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:49:40" (1/3) ... [2023-08-31 03:49:40,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554e2ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:49:40, skipping insertion in model container [2023-08-31 03:49:40,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:49:40" (2/3) ... [2023-08-31 03:49:40,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554e2ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:49:40, skipping insertion in model container [2023-08-31 03:49:40,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:49:40" (3/3) ... [2023-08-31 03:49:40,939 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-08-31 03:49:40,944 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:49:40,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:49:40,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:49:40,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:49:41,040 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 03:49:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 174 transitions, 372 flow [2023-08-31 03:49:41,121 INFO L130 PetriNetUnfolder]: 16/171 cut-off events. [2023-08-31 03:49:41,121 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:49:41,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 16/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 119 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-08-31 03:49:41,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 174 transitions, 372 flow [2023-08-31 03:49:41,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 161 transitions, 340 flow [2023-08-31 03:49:41,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:49:41,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 161 transitions, 340 flow [2023-08-31 03:49:41,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 161 transitions, 340 flow [2023-08-31 03:49:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 161 transitions, 340 flow [2023-08-31 03:49:41,178 INFO L130 PetriNetUnfolder]: 16/161 cut-off events. [2023-08-31 03:49:41,178 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:49:41,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 161 events. 16/161 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-08-31 03:49:41,180 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-08-31 03:49:45,551 INFO L134 LiptonReduction]: Checked pairs total: 2460 [2023-08-31 03:49:45,551 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-31 03:49:45,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:49:45,566 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;@1f61dc78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:49:45,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 03:49:45,571 INFO L130 PetriNetUnfolder]: 6/28 cut-off events. [2023-08-31 03:49:45,571 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 03:49:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:45,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:45,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:45,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash 290379782, now seen corresponding path program 1 times [2023-08-31 03:49:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356056939] [2023-08-31 03:49:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:46,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356056939] [2023-08-31 03:49:46,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356056939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:49:46,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:49:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 03:49:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037009192] [2023-08-31 03:49:46,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:46,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:49:46,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:46,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:49:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:49:46,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 328 [2023-08-31 03:49:46,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:46,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:46,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 328 [2023-08-31 03:49:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:46,340 INFO L130 PetriNetUnfolder]: 853/1153 cut-off events. [2023-08-31 03:49:46,340 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-31 03:49:46,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1153 events. 853/1153 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4189 event pairs, 310 based on Foata normal form. 1/690 useless extension candidates. Maximal degree in co-relation 1073. Up to 740 conditions per place. [2023-08-31 03:49:46,349 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 44 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2023-08-31 03:49:46,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 242 flow [2023-08-31 03:49:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:49:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:49:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-08-31 03:49:46,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47789634146341464 [2023-08-31 03:49:46,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-08-31 03:49:46,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-08-31 03:49:46,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:46,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-08-31 03:49:46,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:46,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:46,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:46,388 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 4 states and 627 transitions. [2023-08-31 03:49:46,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 242 flow [2023-08-31 03:49:46,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 03:49:46,394 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 98 flow [2023-08-31 03:49:46,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-08-31 03:49:46,398 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-31 03:49:46,399 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 98 flow [2023-08-31 03:49:46,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:46,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:46,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:46,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:49:46,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:46,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 26416036, now seen corresponding path program 1 times [2023-08-31 03:49:46,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:46,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808936017] [2023-08-31 03:49:46,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:46,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808936017] [2023-08-31 03:49:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808936017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:46,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600673317] [2023-08-31 03:49:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:46,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:46,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:46,531 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) [2023-08-31 03:49:46,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:49:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:46,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:49:46,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:46,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:46,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600673317] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:46,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:49:46,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-08-31 03:49:46,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061258091] [2023-08-31 03:49:46,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:46,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:49:46,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:49:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:49:46,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 328 [2023-08-31 03:49:46,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:46,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:46,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 328 [2023-08-31 03:49:46,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:47,029 INFO L130 PetriNetUnfolder]: 1545/2124 cut-off events. [2023-08-31 03:49:47,029 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2023-08-31 03:49:47,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4701 conditions, 2124 events. 1545/2124 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9164 event pairs, 757 based on Foata normal form. 0/1464 useless extension candidates. Maximal degree in co-relation 4470. Up to 1045 conditions per place. [2023-08-31 03:49:47,040 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 51 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-31 03:49:47,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 280 flow [2023-08-31 03:49:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:49:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:49:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-31 03:49:47,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46219512195121953 [2023-08-31 03:49:47,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-31 03:49:47,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-31 03:49:47,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:47,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-31 03:49:47,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,049 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,049 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 98 flow. Second operand 5 states and 758 transitions. [2023-08-31 03:49:47,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 280 flow [2023-08-31 03:49:47,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 59 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 03:49:47,053 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 112 flow [2023-08-31 03:49:47,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-08-31 03:49:47,054 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-31 03:49:47,054 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 112 flow [2023-08-31 03:49:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:47,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:47,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 03:49:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:47,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:47,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash 232148464, now seen corresponding path program 1 times [2023-08-31 03:49:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:47,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125866005] [2023-08-31 03:49:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:47,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125866005] [2023-08-31 03:49:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125866005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:49:47,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:49:47,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:49:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337866595] [2023-08-31 03:49:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:47,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:49:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:49:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:49:47,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 328 [2023-08-31 03:49:47,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:47,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 328 [2023-08-31 03:49:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:47,587 INFO L130 PetriNetUnfolder]: 1172/1618 cut-off events. [2023-08-31 03:49:47,587 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-31 03:49:47,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3414 conditions, 1618 events. 1172/1618 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6354 event pairs, 521 based on Foata normal form. 67/1175 useless extension candidates. Maximal degree in co-relation 2060. Up to 793 conditions per place. [2023-08-31 03:49:47,594 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 60 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-08-31 03:49:47,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 324 flow [2023-08-31 03:49:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:49:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:49:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 776 transitions. [2023-08-31 03:49:47,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2023-08-31 03:49:47,596 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 776 transitions. [2023-08-31 03:49:47,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 776 transitions. [2023-08-31 03:49:47,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:47,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 776 transitions. [2023-08-31 03:49:47,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,600 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,600 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 112 flow. Second operand 5 states and 776 transitions. [2023-08-31 03:49:47,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 324 flow [2023-08-31 03:49:47,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 319 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 03:49:47,602 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 120 flow [2023-08-31 03:49:47,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-31 03:49:47,603 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-31 03:49:47,603 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 120 flow [2023-08-31 03:49:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:47,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:47,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 03:49:47,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:47,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1046469637, now seen corresponding path program 1 times [2023-08-31 03:49:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:47,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149369943] [2023-08-31 03:49:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:47,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:47,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:47,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149369943] [2023-08-31 03:49:47,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149369943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:47,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232550125] [2023-08-31 03:49:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:47,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:47,687 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) [2023-08-31 03:49:47,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:49:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:49:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:47,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:49:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232550125] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:47,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:49:47,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-31 03:49:47,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458898921] [2023-08-31 03:49:47,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:47,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:49:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:49:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:49:47,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:49:47,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:47,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:47,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:49:47,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:48,114 INFO L130 PetriNetUnfolder]: 1052/1471 cut-off events. [2023-08-31 03:49:48,115 INFO L131 PetriNetUnfolder]: For 418/442 co-relation queries the response was YES. [2023-08-31 03:49:48,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 1471 events. 1052/1471 cut-off events. For 418/442 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6024 event pairs, 377 based on Foata normal form. 24/1116 useless extension candidates. Maximal degree in co-relation 1868. Up to 498 conditions per place. [2023-08-31 03:49:48,123 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 69 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-31 03:49:48,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 388 flow [2023-08-31 03:49:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:49:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:49:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 896 transitions. [2023-08-31 03:49:48,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2023-08-31 03:49:48,126 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 896 transitions. [2023-08-31 03:49:48,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 896 transitions. [2023-08-31 03:49:48,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:48,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 896 transitions. [2023-08-31 03:49:48,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.33333333333334) internal successors, (896), 6 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,134 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,134 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 120 flow. Second operand 6 states and 896 transitions. [2023-08-31 03:49:48,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 388 flow [2023-08-31 03:49:48,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 79 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 03:49:48,137 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2023-08-31 03:49:48,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-08-31 03:49:48,138 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-31 03:49:48,138 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2023-08-31 03:49:48,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:48,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:48,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:48,345 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,SelfDestructingSolverStorable3 [2023-08-31 03:49:48,346 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:48,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash -709973367, now seen corresponding path program 1 times [2023-08-31 03:49:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286623977] [2023-08-31 03:49:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:49:48,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:48,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286623977] [2023-08-31 03:49:48,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286623977] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:49:48,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:49:48,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 03:49:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877076418] [2023-08-31 03:49:48,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:48,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:49:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:49:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:49:48,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 328 [2023-08-31 03:49:48,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:48,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 328 [2023-08-31 03:49:48,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:48,655 INFO L130 PetriNetUnfolder]: 611/889 cut-off events. [2023-08-31 03:49:48,655 INFO L131 PetriNetUnfolder]: For 634/704 co-relation queries the response was YES. [2023-08-31 03:49:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 889 events. 611/889 cut-off events. For 634/704 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3455 event pairs, 290 based on Foata normal form. 70/891 useless extension candidates. Maximal degree in co-relation 1681. Up to 614 conditions per place. [2023-08-31 03:49:48,660 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 26 selfloop transitions, 4 changer transitions 30/62 dead transitions. [2023-08-31 03:49:48,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 326 flow [2023-08-31 03:49:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:49:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:49:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 769 transitions. [2023-08-31 03:49:48,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689024390243902 [2023-08-31 03:49:48,662 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 769 transitions. [2023-08-31 03:49:48,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 769 transitions. [2023-08-31 03:49:48,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:48,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 769 transitions. [2023-08-31 03:49:48,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,666 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 5 states and 769 transitions. [2023-08-31 03:49:48,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 326 flow [2023-08-31 03:49:48,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 03:49:48,669 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 127 flow [2023-08-31 03:49:48,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-08-31 03:49:48,671 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-08-31 03:49:48,671 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 127 flow [2023-08-31 03:49:48,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:48,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:48,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 03:49:48,672 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:48,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash 877946428, now seen corresponding path program 1 times [2023-08-31 03:49:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581268589] [2023-08-31 03:49:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:48,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581268589] [2023-08-31 03:49:48,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581268589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366589748] [2023-08-31 03:49:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:48,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:48,793 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) [2023-08-31 03:49:48,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:49:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:49:48,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366589748] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:48,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:49:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-31 03:49:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855196312] [2023-08-31 03:49:48,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:48,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:49:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:49:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:49:48,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:49:48,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:48,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:48,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:49:48,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:49,114 INFO L130 PetriNetUnfolder]: 563/780 cut-off events. [2023-08-31 03:49:49,115 INFO L131 PetriNetUnfolder]: For 486/568 co-relation queries the response was YES. [2023-08-31 03:49:49,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 780 events. 563/780 cut-off events. For 486/568 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2694 event pairs, 237 based on Foata normal form. 124/807 useless extension candidates. Maximal degree in co-relation 2179. Up to 609 conditions per place. [2023-08-31 03:49:49,120 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 40 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-31 03:49:49,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 265 flow [2023-08-31 03:49:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:49:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:49:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-31 03:49:49,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432926829268293 [2023-08-31 03:49:49,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-31 03:49:49,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-31 03:49:49,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:49,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-31 03:49:49,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,128 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,128 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 127 flow. Second operand 5 states and 727 transitions. [2023-08-31 03:49:49,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 265 flow [2023-08-31 03:49:49,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 235 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-31 03:49:49,130 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 121 flow [2023-08-31 03:49:49,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-31 03:49:49,131 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-31 03:49:49,131 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 121 flow [2023-08-31 03:49:49,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:49,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:49,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-31 03:49:49,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:49,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:49,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash -510812246, now seen corresponding path program 1 times [2023-08-31 03:49:49,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:49,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791697749] [2023-08-31 03:49:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:49,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:49,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791697749] [2023-08-31 03:49:49,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791697749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7653737] [2023-08-31 03:49:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:49,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:49,412 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) [2023-08-31 03:49:49,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:49:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:49,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:49:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:49,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7653737] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:49,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:49:49,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-31 03:49:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445757969] [2023-08-31 03:49:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:49,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:49:49,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:49:49,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-31 03:49:49,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:49:49,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:49,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:49:49,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:49,739 INFO L130 PetriNetUnfolder]: 515/725 cut-off events. [2023-08-31 03:49:49,740 INFO L131 PetriNetUnfolder]: For 631/815 co-relation queries the response was YES. [2023-08-31 03:49:49,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 725 events. 515/725 cut-off events. For 631/815 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2316 event pairs, 191 based on Foata normal form. 184/806 useless extension candidates. Maximal degree in co-relation 2025. Up to 395 conditions per place. [2023-08-31 03:49:49,744 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 39 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-08-31 03:49:49,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 262 flow [2023-08-31 03:49:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:49:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:49:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-31 03:49:49,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426829268292683 [2023-08-31 03:49:49,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-31 03:49:49,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-31 03:49:49,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:49,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-31 03:49:49,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,751 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 121 flow. Second operand 5 states and 726 transitions. [2023-08-31 03:49:49,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 262 flow [2023-08-31 03:49:49,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 251 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 03:49:49,753 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 144 flow [2023-08-31 03:49:49,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-31 03:49:49,754 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-08-31 03:49:49,754 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 144 flow [2023-08-31 03:49:49,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:49,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:49,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:49,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:49,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:49,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:49,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash -990804847, now seen corresponding path program 1 times [2023-08-31 03:49:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752382673] [2023-08-31 03:49:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:49,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 03:49:50,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:50,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752382673] [2023-08-31 03:49:50,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752382673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:49:50,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:49:50,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 03:49:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511759125] [2023-08-31 03:49:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:49:50,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 03:49:50,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 03:49:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 03:49:50,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 328 [2023-08-31 03:49:50,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:50,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:50,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 328 [2023-08-31 03:49:50,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:50,380 INFO L130 PetriNetUnfolder]: 1096/1546 cut-off events. [2023-08-31 03:49:50,380 INFO L131 PetriNetUnfolder]: For 1643/1861 co-relation queries the response was YES. [2023-08-31 03:49:50,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 1546 events. 1096/1546 cut-off events. For 1643/1861 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5671 event pairs, 121 based on Foata normal form. 294/1662 useless extension candidates. Maximal degree in co-relation 4774. Up to 530 conditions per place. [2023-08-31 03:49:50,386 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 89 selfloop transitions, 17 changer transitions 13/120 dead transitions. [2023-08-31 03:49:50,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 120 transitions, 700 flow [2023-08-31 03:49:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:49:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:49:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1433 transitions. [2023-08-31 03:49:50,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4854336043360434 [2023-08-31 03:49:50,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1433 transitions. [2023-08-31 03:49:50,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1433 transitions. [2023-08-31 03:49:50,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:50,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1433 transitions. [2023-08-31 03:49:50,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.22222222222223) internal successors, (1433), 9 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:50,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:50,395 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:50,395 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 144 flow. Second operand 9 states and 1433 transitions. [2023-08-31 03:49:50,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 120 transitions, 700 flow [2023-08-31 03:49:50,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 120 transitions, 691 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 03:49:50,401 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 292 flow [2023-08-31 03:49:50,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-31 03:49:50,402 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2023-08-31 03:49:50,402 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 292 flow [2023-08-31 03:49:50,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:50,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:50,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:50,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 03:49:50,403 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:50,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -849126380, now seen corresponding path program 2 times [2023-08-31 03:49:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244306285] [2023-08-31 03:49:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:49:50,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:50,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244306285] [2023-08-31 03:49:50,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244306285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:50,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004013702] [2023-08-31 03:49:50,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:49:50,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:50,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:50,508 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) [2023-08-31 03:49:50,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:49:50,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:49:50,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:49:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:49:50,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 03:49:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004013702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:50,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:50,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 03:49:50,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401007744] [2023-08-31 03:49:50,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:50,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:49:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:50,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:49:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:49:51,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:49:51,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 292 flow. Second operand has 14 states, 14 states have (on average 140.14285714285714) internal successors, (1962), 14 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:51,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:51,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:49:51,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:51,315 INFO L130 PetriNetUnfolder]: 1332/1958 cut-off events. [2023-08-31 03:49:51,315 INFO L131 PetriNetUnfolder]: For 5356/5834 co-relation queries the response was YES. [2023-08-31 03:49:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7451 conditions, 1958 events. 1332/1958 cut-off events. For 5356/5834 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8155 event pairs, 468 based on Foata normal form. 492/2442 useless extension candidates. Maximal degree in co-relation 5385. Up to 1028 conditions per place. [2023-08-31 03:49:51,324 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 57 selfloop transitions, 7 changer transitions 52/120 dead transitions. [2023-08-31 03:49:51,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 888 flow [2023-08-31 03:49:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 03:49:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 03:49:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1317 transitions. [2023-08-31 03:49:51,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44613821138211385 [2023-08-31 03:49:51,327 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1317 transitions. [2023-08-31 03:49:51,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1317 transitions. [2023-08-31 03:49:51,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:51,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1317 transitions. [2023-08-31 03:49:51,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.33333333333334) internal successors, (1317), 9 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:51,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:51,333 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:51,333 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 292 flow. Second operand 9 states and 1317 transitions. [2023-08-31 03:49:51,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 888 flow [2023-08-31 03:49:51,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 864 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-08-31 03:49:51,344 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 330 flow [2023-08-31 03:49:51,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-08-31 03:49:51,345 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-08-31 03:49:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 330 flow [2023-08-31 03:49:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 140.14285714285714) internal successors, (1962), 14 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:51,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:51,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:51,551 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:51,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:51,551 INFO L85 PathProgramCache]: Analyzing trace with hash 123513301, now seen corresponding path program 3 times [2023-08-31 03:49:51,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:51,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161430505] [2023-08-31 03:49:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:51,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 03:49:51,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161430505] [2023-08-31 03:49:51,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161430505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:51,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016447830] [2023-08-31 03:49:51,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:49:51,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:51,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:51,713 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) [2023-08-31 03:49:51,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:49:51,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:49:51,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:49:51,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 03:49:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 03:49:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016447830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:51,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-31 03:49:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518718663] [2023-08-31 03:49:51,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:51,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:49:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:49:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:49:52,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:49:52,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 330 flow. Second operand has 15 states, 15 states have (on average 139.73333333333332) internal successors, (2096), 15 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:52,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:52,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:49:52,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:52,510 INFO L130 PetriNetUnfolder]: 1403/2019 cut-off events. [2023-08-31 03:49:52,510 INFO L131 PetriNetUnfolder]: For 5477/5691 co-relation queries the response was YES. [2023-08-31 03:49:52,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 2019 events. 1403/2019 cut-off events. For 5477/5691 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7974 event pairs, 432 based on Foata normal form. 302/2309 useless extension candidates. Maximal degree in co-relation 7864. Up to 1316 conditions per place. [2023-08-31 03:49:52,520 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 91 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2023-08-31 03:49:52,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 884 flow [2023-08-31 03:49:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 03:49:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 03:49:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1153 transitions. [2023-08-31 03:49:52,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43940548780487804 [2023-08-31 03:49:52,523 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1153 transitions. [2023-08-31 03:49:52,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1153 transitions. [2023-08-31 03:49:52,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:52,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1153 transitions. [2023-08-31 03:49:52,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.125) internal successors, (1153), 8 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:52,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 328.0) internal successors, (2952), 9 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:52,528 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 328.0) internal successors, (2952), 9 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:52,529 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 330 flow. Second operand 8 states and 1153 transitions. [2023-08-31 03:49:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 884 flow [2023-08-31 03:49:52,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 846 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-31 03:49:52,539 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 336 flow [2023-08-31 03:49:52,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-31 03:49:52,539 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-08-31 03:49:52,539 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 336 flow [2023-08-31 03:49:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 139.73333333333332) internal successors, (2096), 15 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:52,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:52,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:52,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:52,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:52,746 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:52,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:52,747 INFO L85 PathProgramCache]: Analyzing trace with hash -18919933, now seen corresponding path program 4 times [2023-08-31 03:49:52,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:52,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398003619] [2023-08-31 03:49:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-31 03:49:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398003619] [2023-08-31 03:49:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398003619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105324274] [2023-08-31 03:49:52,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:49:52,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:52,848 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) [2023-08-31 03:49:52,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:49:52,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:49:52,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:49:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:49:53,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 03:49:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105324274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:53,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 03:49:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134728550] [2023-08-31 03:49:53,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:53,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 03:49:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 03:49:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-31 03:49:53,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 328 [2023-08-31 03:49:53,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 336 flow. Second operand has 13 states, 13 states have (on average 137.30769230769232) internal successors, (1785), 13 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:53,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:53,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 328 [2023-08-31 03:49:53,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:53,820 INFO L130 PetriNetUnfolder]: 2106/2946 cut-off events. [2023-08-31 03:49:53,820 INFO L131 PetriNetUnfolder]: For 8707/8747 co-relation queries the response was YES. [2023-08-31 03:49:53,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12356 conditions, 2946 events. 2106/2946 cut-off events. For 8707/8747 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11180 event pairs, 61 based on Foata normal form. 78/3024 useless extension candidates. Maximal degree in co-relation 12310. Up to 950 conditions per place. [2023-08-31 03:49:53,834 INFO L137 encePairwiseOnDemand]: 317/328 looper letters, 167 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2023-08-31 03:49:53,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 207 transitions, 1724 flow [2023-08-31 03:49:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:49:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:49:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2406 transitions. [2023-08-31 03:49:53,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43149210903873747 [2023-08-31 03:49:53,839 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2406 transitions. [2023-08-31 03:49:53,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2406 transitions. [2023-08-31 03:49:53,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:53,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2406 transitions. [2023-08-31 03:49:53,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 141.52941176470588) internal successors, (2406), 17 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:53,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:53,849 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:53,849 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 336 flow. Second operand 17 states and 2406 transitions. [2023-08-31 03:49:53,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 207 transitions, 1724 flow [2023-08-31 03:49:53,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 207 transitions, 1693 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-31 03:49:53,864 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 678 flow [2023-08-31 03:49:53,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=678, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-31 03:49:53,864 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-08-31 03:49:53,864 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 678 flow [2023-08-31 03:49:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.30769230769232) internal successors, (1785), 13 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:53,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:53,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:53,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:54,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:54,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -625333260, now seen corresponding path program 5 times [2023-08-31 03:49:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259278653] [2023-08-31 03:49:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-31 03:49:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259278653] [2023-08-31 03:49:54,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259278653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:54,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310732032] [2023-08-31 03:49:54,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:49:54,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:54,231 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) [2023-08-31 03:49:54,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:49:54,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:49:54,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:49:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-31 03:49:54,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-31 03:49:54,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310732032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:54,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:54,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-31 03:49:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029734107] [2023-08-31 03:49:54,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:49:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:49:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:49:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 328 [2023-08-31 03:49:54,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 678 flow. Second operand has 15 states, 15 states have (on average 149.13333333333333) internal successors, (2237), 15 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:54,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:54,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 328 [2023-08-31 03:49:54,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:55,549 INFO L130 PetriNetUnfolder]: 4224/6102 cut-off events. [2023-08-31 03:49:55,550 INFO L131 PetriNetUnfolder]: For 24215/24301 co-relation queries the response was YES. [2023-08-31 03:49:55,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 6102 events. 4224/6102 cut-off events. For 24215/24301 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 28704 event pairs, 548 based on Foata normal form. 390/6492 useless extension candidates. Maximal degree in co-relation 26499. Up to 1525 conditions per place. [2023-08-31 03:49:55,579 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 232 selfloop transitions, 54 changer transitions 24/314 dead transitions. [2023-08-31 03:49:55,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 314 transitions, 2629 flow [2023-08-31 03:49:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 03:49:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 03:49:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3001 transitions. [2023-08-31 03:49:55,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48154685494223365 [2023-08-31 03:49:55,584 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3001 transitions. [2023-08-31 03:49:55,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3001 transitions. [2023-08-31 03:49:55,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:55,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3001 transitions. [2023-08-31 03:49:55,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 157.94736842105263) internal successors, (3001), 19 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:55,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 328.0) internal successors, (6560), 20 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:55,595 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 328.0) internal successors, (6560), 20 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:55,595 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 678 flow. Second operand 19 states and 3001 transitions. [2023-08-31 03:49:55,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 314 transitions, 2629 flow [2023-08-31 03:49:55,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 314 transitions, 2472 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-08-31 03:49:55,659 INFO L231 Difference]: Finished difference. Result has 106 places, 116 transitions, 1185 flow [2023-08-31 03:49:55,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1185, PETRI_PLACES=106, PETRI_TRANSITIONS=116} [2023-08-31 03:49:55,659 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 73 predicate places. [2023-08-31 03:49:55,660 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 116 transitions, 1185 flow [2023-08-31 03:49:55,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 149.13333333333333) internal successors, (2237), 15 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:55,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:55,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:55,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 03:49:55,865 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,SelfDestructingSolverStorable11 [2023-08-31 03:49:55,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:55,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1824849498, now seen corresponding path program 6 times [2023-08-31 03:49:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136759496] [2023-08-31 03:49:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-31 03:49:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136759496] [2023-08-31 03:49:56,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136759496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241009832] [2023-08-31 03:49:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:49:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:56,068 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) [2023-08-31 03:49:56,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:49:56,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:49:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:49:56,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:49:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-31 03:49:56,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-31 03:49:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241009832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:56,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-08-31 03:49:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14841345] [2023-08-31 03:49:56,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:49:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:49:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:49:56,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 328 [2023-08-31 03:49:56,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 116 transitions, 1185 flow. Second operand has 14 states, 14 states have (on average 149.14285714285714) internal successors, (2088), 14 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:56,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:56,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 328 [2023-08-31 03:49:56,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:49:57,399 INFO L130 PetriNetUnfolder]: 5322/7712 cut-off events. [2023-08-31 03:49:57,399 INFO L131 PetriNetUnfolder]: For 37213/37321 co-relation queries the response was YES. [2023-08-31 03:49:57,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37890 conditions, 7712 events. 5322/7712 cut-off events. For 37213/37321 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 37613 event pairs, 319 based on Foata normal form. 184/7895 useless extension candidates. Maximal degree in co-relation 37831. Up to 1943 conditions per place. [2023-08-31 03:49:57,486 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 208 selfloop transitions, 77 changer transitions 24/313 dead transitions. [2023-08-31 03:49:57,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 313 transitions, 2910 flow [2023-08-31 03:49:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:49:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:49:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2686 transitions. [2023-08-31 03:49:57,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2023-08-31 03:49:57,491 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2686 transitions. [2023-08-31 03:49:57,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2686 transitions. [2023-08-31 03:49:57,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:49:57,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2686 transitions. [2023-08-31 03:49:57,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:57,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:57,502 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:57,502 INFO L175 Difference]: Start difference. First operand has 106 places, 116 transitions, 1185 flow. Second operand 17 states and 2686 transitions. [2023-08-31 03:49:57,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 313 transitions, 2910 flow [2023-08-31 03:49:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 313 transitions, 2831 flow, removed 37 selfloop flow, removed 1 redundant places. [2023-08-31 03:49:57,668 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1647 flow [2023-08-31 03:49:57,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1647, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2023-08-31 03:49:57,669 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2023-08-31 03:49:57,669 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1647 flow [2023-08-31 03:49:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 149.14285714285714) internal successors, (2088), 14 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:57,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:49:57,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:49:57,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:49:57,876 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,SelfDestructingSolverStorable12 [2023-08-31 03:49:57,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:49:57,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:49:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1957586289, now seen corresponding path program 7 times [2023-08-31 03:49:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:49:57,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540061915] [2023-08-31 03:49:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:49:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:49:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 03:49:57,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:49:57,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540061915] [2023-08-31 03:49:57,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540061915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:49:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918370228] [2023-08-31 03:49:58,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:49:58,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:49:58,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:49:58,001 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) [2023-08-31 03:49:58,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:49:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:49:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:49:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:49:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 03:49:58,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:49:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 03:49:58,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918370228] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:49:58,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:49:58,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 03:49:58,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851805498] [2023-08-31 03:49:58,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:49:58,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:49:58,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:49:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:49:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:49:58,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:49:58,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1647 flow. Second operand has 19 states, 19 states have (on average 139.8421052631579) internal successors, (2657), 19 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:49:58,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:49:58,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:49:58,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:00,029 INFO L130 PetriNetUnfolder]: 7658/11250 cut-off events. [2023-08-31 03:50:00,029 INFO L131 PetriNetUnfolder]: For 75140/75711 co-relation queries the response was YES. [2023-08-31 03:50:00,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57205 conditions, 11250 events. 7658/11250 cut-off events. For 75140/75711 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 62070 event pairs, 2159 based on Foata normal form. 693/11801 useless extension candidates. Maximal degree in co-relation 54064. Up to 5118 conditions per place. [2023-08-31 03:50:00,083 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 163 selfloop transitions, 9 changer transitions 130/321 dead transitions. [2023-08-31 03:50:00,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 321 transitions, 4057 flow [2023-08-31 03:50:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 03:50:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 03:50:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1892 transitions. [2023-08-31 03:50:00,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437148217636023 [2023-08-31 03:50:00,086 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1892 transitions. [2023-08-31 03:50:00,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1892 transitions. [2023-08-31 03:50:00,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:00,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1892 transitions. [2023-08-31 03:50:00,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 145.53846153846155) internal successors, (1892), 13 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:00,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 328.0) internal successors, (4592), 14 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:00,092 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 328.0) internal successors, (4592), 14 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:00,092 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1647 flow. Second operand 13 states and 1892 transitions. [2023-08-31 03:50:00,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 321 transitions, 4057 flow [2023-08-31 03:50:00,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 321 transitions, 3807 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-08-31 03:50:00,422 INFO L231 Difference]: Finished difference. Result has 138 places, 140 transitions, 1608 flow [2023-08-31 03:50:00,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1608, PETRI_PLACES=138, PETRI_TRANSITIONS=140} [2023-08-31 03:50:00,423 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 105 predicate places. [2023-08-31 03:50:00,423 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 140 transitions, 1608 flow [2023-08-31 03:50:00,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.8421052631579) internal successors, (2657), 19 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:00,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:00,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:00,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:00,628 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,SelfDestructingSolverStorable13 [2023-08-31 03:50:00,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:00,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2013782112, now seen corresponding path program 8 times [2023-08-31 03:50:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684871551] [2023-08-31 03:50:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-31 03:50:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684871551] [2023-08-31 03:50:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684871551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346195268] [2023-08-31 03:50:00,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:50:00,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:00,836 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) [2023-08-31 03:50:00,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:50:00,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:50:00,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:50:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-31 03:50:01,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-31 03:50:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346195268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:01,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:01,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-31 03:50:01,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389898437] [2023-08-31 03:50:01,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:01,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:50:01,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:50:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:50:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:50:01,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 140 transitions, 1608 flow. Second operand has 20 states, 20 states have (on average 139.2) internal successors, (2784), 20 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:01,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:01,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:50:01,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:02,597 INFO L130 PetriNetUnfolder]: 6434/9178 cut-off events. [2023-08-31 03:50:02,597 INFO L131 PetriNetUnfolder]: For 57039/57404 co-relation queries the response was YES. [2023-08-31 03:50:02,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47464 conditions, 9178 events. 6434/9178 cut-off events. For 57039/57404 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 45952 event pairs, 1922 based on Foata normal form. 635/9672 useless extension candidates. Maximal degree in co-relation 47382. Up to 5194 conditions per place. [2023-08-31 03:50:02,652 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 276 selfloop transitions, 17 changer transitions 60/371 dead transitions. [2023-08-31 03:50:02,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 371 transitions, 5036 flow [2023-08-31 03:50:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 03:50:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 03:50:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1579 transitions. [2023-08-31 03:50:02,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43763858093126384 [2023-08-31 03:50:02,655 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1579 transitions. [2023-08-31 03:50:02,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1579 transitions. [2023-08-31 03:50:02,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:02,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1579 transitions. [2023-08-31 03:50:02,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 143.54545454545453) internal successors, (1579), 11 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:02,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:02,661 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:02,661 INFO L175 Difference]: Start difference. First operand has 138 places, 140 transitions, 1608 flow. Second operand 11 states and 1579 transitions. [2023-08-31 03:50:02,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 371 transitions, 5036 flow [2023-08-31 03:50:02,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 371 transitions, 4894 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-08-31 03:50:02,948 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1421 flow [2023-08-31 03:50:02,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1421, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2023-08-31 03:50:02,948 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 102 predicate places. [2023-08-31 03:50:02,948 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1421 flow [2023-08-31 03:50:02,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 139.2) internal successors, (2784), 20 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:02,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:02,949 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:02,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:03,151 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,SelfDestructingSolverStorable14 [2023-08-31 03:50:03,152 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:03,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash -816507476, now seen corresponding path program 9 times [2023-08-31 03:50:03,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:03,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829991478] [2023-08-31 03:50:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 03:50:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829991478] [2023-08-31 03:50:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829991478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963104063] [2023-08-31 03:50:03,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:50:03,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:03,302 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:50:03,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:50:03,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:50:03,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 03:50:03,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 03:50:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963104063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:03,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-31 03:50:03,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590698184] [2023-08-31 03:50:03,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:03,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:50:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:50:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:50:04,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:50:04,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1421 flow. Second operand has 20 states, 20 states have (on average 139.75) internal successors, (2795), 20 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:04,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:04,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:50:04,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:05,109 INFO L130 PetriNetUnfolder]: 5413/7679 cut-off events. [2023-08-31 03:50:05,109 INFO L131 PetriNetUnfolder]: For 46210/46350 co-relation queries the response was YES. [2023-08-31 03:50:05,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42148 conditions, 7679 events. 5413/7679 cut-off events. For 46210/46350 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 35293 event pairs, 594 based on Foata normal form. 178/7842 useless extension candidates. Maximal degree in co-relation 42070. Up to 4104 conditions per place. [2023-08-31 03:50:05,173 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 148 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2023-08-31 03:50:05,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 201 transitions, 2416 flow [2023-08-31 03:50:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 03:50:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 03:50:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1728 transitions. [2023-08-31 03:50:05,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2023-08-31 03:50:05,177 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1728 transitions. [2023-08-31 03:50:05,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1728 transitions. [2023-08-31 03:50:05,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:05,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1728 transitions. [2023-08-31 03:50:05,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:05,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 328.0) internal successors, (4264), 13 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:05,183 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 328.0) internal successors, (4264), 13 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:05,183 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1421 flow. Second operand 12 states and 1728 transitions. [2023-08-31 03:50:05,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 201 transitions, 2416 flow [2023-08-31 03:50:05,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 201 transitions, 2264 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-08-31 03:50:05,483 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 1589 flow [2023-08-31 03:50:05,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1589, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2023-08-31 03:50:05,483 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 103 predicate places. [2023-08-31 03:50:05,483 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 1589 flow [2023-08-31 03:50:05,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 139.75) internal successors, (2795), 20 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:05,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:05,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:05,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:05,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 03:50:05,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:05,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:05,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1011768859, now seen corresponding path program 10 times [2023-08-31 03:50:05,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:05,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521442650] [2023-08-31 03:50:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:05,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 03:50:05,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:05,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521442650] [2023-08-31 03:50:05,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521442650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:05,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895013156] [2023-08-31 03:50:05,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:50:05,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:05,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:05,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:05,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:50:06,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:50:06,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:50:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 03:50:06,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 03:50:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895013156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:06,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:06,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-08-31 03:50:06,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140070175] [2023-08-31 03:50:06,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 03:50:06,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 03:50:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-31 03:50:06,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 328 [2023-08-31 03:50:06,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 1589 flow. Second operand has 17 states, 17 states have (on average 149.05882352941177) internal successors, (2534), 17 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:06,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:06,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 328 [2023-08-31 03:50:06,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:07,891 INFO L130 PetriNetUnfolder]: 7450/10528 cut-off events. [2023-08-31 03:50:07,891 INFO L131 PetriNetUnfolder]: For 58408/58530 co-relation queries the response was YES. [2023-08-31 03:50:07,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55880 conditions, 10528 events. 7450/10528 cut-off events. For 58408/58530 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 49706 event pairs, 449 based on Foata normal form. 210/10738 useless extension candidates. Maximal degree in co-relation 55803. Up to 2092 conditions per place. [2023-08-31 03:50:07,949 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 342 selfloop transitions, 104 changer transitions 52/502 dead transitions. [2023-08-31 03:50:07,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 502 transitions, 4850 flow [2023-08-31 03:50:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:50:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:50:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4421 transitions. [2023-08-31 03:50:07,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813806620209059 [2023-08-31 03:50:07,954 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4421 transitions. [2023-08-31 03:50:07,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4421 transitions. [2023-08-31 03:50:07,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:08,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4421 transitions. [2023-08-31 03:50:08,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 157.89285714285714) internal successors, (4421), 28 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:08,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 328.0) internal successors, (9512), 29 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:08,064 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 328.0) internal successors, (9512), 29 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:08,064 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 1589 flow. Second operand 28 states and 4421 transitions. [2023-08-31 03:50:08,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 502 transitions, 4850 flow [2023-08-31 03:50:08,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 502 transitions, 4785 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 03:50:08,316 INFO L231 Difference]: Finished difference. Result has 161 places, 169 transitions, 2319 flow [2023-08-31 03:50:08,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2319, PETRI_PLACES=161, PETRI_TRANSITIONS=169} [2023-08-31 03:50:08,316 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 128 predicate places. [2023-08-31 03:50:08,316 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 169 transitions, 2319 flow [2023-08-31 03:50:08,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 149.05882352941177) internal successors, (2534), 17 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:08,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:08,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:08,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:08,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:50:08,525 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:08,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:08,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1542560206, now seen corresponding path program 11 times [2023-08-31 03:50:08,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:08,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921831759] [2023-08-31 03:50:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:08,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-31 03:50:08,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:08,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921831759] [2023-08-31 03:50:08,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921831759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:08,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230313064] [2023-08-31 03:50:08,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:50:08,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:08,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:08,674 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:08,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:50:09,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-31 03:50:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:50:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-31 03:50:09,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-31 03:50:09,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230313064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:09,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:09,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-31 03:50:09,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003775085] [2023-08-31 03:50:09,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:09,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:50:09,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:50:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:50:09,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:50:09,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 169 transitions, 2319 flow. Second operand has 24 states, 24 states have (on average 139.54166666666666) internal successors, (3349), 24 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:09,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:09,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:50:09,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:11,539 INFO L130 PetriNetUnfolder]: 11441/16325 cut-off events. [2023-08-31 03:50:11,539 INFO L131 PetriNetUnfolder]: For 131859/132679 co-relation queries the response was YES. [2023-08-31 03:50:11,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92371 conditions, 16325 events. 11441/16325 cut-off events. For 131859/132679 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 87768 event pairs, 2900 based on Foata normal form. 810/16929 useless extension candidates. Maximal degree in co-relation 87325. Up to 6780 conditions per place. [2023-08-31 03:50:11,624 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 205 selfloop transitions, 11 changer transitions 226/464 dead transitions. [2023-08-31 03:50:11,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 464 transitions, 6616 flow [2023-08-31 03:50:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:50:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:50:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2468 transitions. [2023-08-31 03:50:11,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44261119081779055 [2023-08-31 03:50:11,627 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2468 transitions. [2023-08-31 03:50:11,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2468 transitions. [2023-08-31 03:50:11,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:11,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2468 transitions. [2023-08-31 03:50:11,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 145.1764705882353) internal successors, (2468), 17 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:11,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:11,633 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:11,633 INFO L175 Difference]: Start difference. First operand has 161 places, 169 transitions, 2319 flow. Second operand 17 states and 2468 transitions. [2023-08-31 03:50:11,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 464 transitions, 6616 flow [2023-08-31 03:50:12,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 464 transitions, 6013 flow, removed 134 selfloop flow, removed 15 redundant places. [2023-08-31 03:50:12,413 INFO L231 Difference]: Finished difference. Result has 168 places, 171 transitions, 2176 flow [2023-08-31 03:50:12,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2176, PETRI_PLACES=168, PETRI_TRANSITIONS=171} [2023-08-31 03:50:12,414 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2023-08-31 03:50:12,414 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 171 transitions, 2176 flow [2023-08-31 03:50:12,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 139.54166666666666) internal successors, (3349), 24 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:12,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:12,414 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:12,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:12,615 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:12,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2025698849, now seen corresponding path program 12 times [2023-08-31 03:50:12,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:12,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703629075] [2023-08-31 03:50:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-31 03:50:12,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:12,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703629075] [2023-08-31 03:50:12,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703629075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:12,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368131664] [2023-08-31 03:50:12,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:50:12,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:12,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:12,810 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:12,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:50:13,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-31 03:50:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:50:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-31 03:50:13,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-31 03:50:13,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368131664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:13,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:13,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-08-31 03:50:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585876209] [2023-08-31 03:50:13,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:13,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:50:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:50:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:50:13,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:50:13,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 171 transitions, 2176 flow. Second operand has 25 states, 25 states have (on average 139.36) internal successors, (3484), 25 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:13,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:13,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:50:13,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:15,290 INFO L130 PetriNetUnfolder]: 8448/11779 cut-off events. [2023-08-31 03:50:15,290 INFO L131 PetriNetUnfolder]: For 89172/89811 co-relation queries the response was YES. [2023-08-31 03:50:15,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65503 conditions, 11779 events. 8448/11779 cut-off events. For 89172/89811 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 57514 event pairs, 2151 based on Foata normal form. 856/12458 useless extension candidates. Maximal degree in co-relation 65406. Up to 5793 conditions per place. [2023-08-31 03:50:15,380 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 477 selfloop transitions, 20 changer transitions 0/518 dead transitions. [2023-08-31 03:50:15,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 518 transitions, 7364 flow [2023-08-31 03:50:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 03:50:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 03:50:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2005 transitions. [2023-08-31 03:50:15,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366289198606272 [2023-08-31 03:50:15,383 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2005 transitions. [2023-08-31 03:50:15,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2005 transitions. [2023-08-31 03:50:15,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:15,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2005 transitions. [2023-08-31 03:50:15,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.21428571428572) internal successors, (2005), 14 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:15,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 328.0) internal successors, (4920), 15 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:15,388 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 328.0) internal successors, (4920), 15 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:15,388 INFO L175 Difference]: Start difference. First operand has 168 places, 171 transitions, 2176 flow. Second operand 14 states and 2005 transitions. [2023-08-31 03:50:15,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 518 transitions, 7364 flow [2023-08-31 03:50:15,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 518 transitions, 7065 flow, removed 139 selfloop flow, removed 9 redundant places. [2023-08-31 03:50:15,902 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 2145 flow [2023-08-31 03:50:15,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2145, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2023-08-31 03:50:15,903 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 130 predicate places. [2023-08-31 03:50:15,903 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 2145 flow [2023-08-31 03:50:15,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 139.36) internal successors, (3484), 25 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:15,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:15,904 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:15,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:16,104 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:16,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash 421770685, now seen corresponding path program 13 times [2023-08-31 03:50:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018114704] [2023-08-31 03:50:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-31 03:50:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018114704] [2023-08-31 03:50:16,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018114704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939095703] [2023-08-31 03:50:16,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:50:16,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:16,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:16,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:50:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:50:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-31 03:50:16,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-31 03:50:16,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939095703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:16,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:16,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-08-31 03:50:16,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23911493] [2023-08-31 03:50:16,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:16,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:50:16,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:50:16,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:50:17,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-08-31 03:50:17,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 2145 flow. Second operand has 25 states, 25 states have (on average 139.6) internal successors, (3490), 25 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:17,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:17,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-08-31 03:50:17,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:18,550 INFO L130 PetriNetUnfolder]: 8881/12471 cut-off events. [2023-08-31 03:50:18,551 INFO L131 PetriNetUnfolder]: For 81543/81703 co-relation queries the response was YES. [2023-08-31 03:50:18,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71775 conditions, 12471 events. 8881/12471 cut-off events. For 81543/81703 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 58901 event pairs, 891 based on Foata normal form. 210/12680 useless extension candidates. Maximal degree in co-relation 71684. Up to 5977 conditions per place. [2023-08-31 03:50:18,614 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 201 selfloop transitions, 63 changer transitions 0/271 dead transitions. [2023-08-31 03:50:18,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 271 transitions, 3503 flow [2023-08-31 03:50:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 03:50:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 03:50:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2154 transitions. [2023-08-31 03:50:18,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378048780487805 [2023-08-31 03:50:18,617 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2154 transitions. [2023-08-31 03:50:18,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2154 transitions. [2023-08-31 03:50:18,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:18,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2154 transitions. [2023-08-31 03:50:18,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 143.6) internal successors, (2154), 15 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:18,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 328.0) internal successors, (5248), 16 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:18,622 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 328.0) internal successors, (5248), 16 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:18,622 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 2145 flow. Second operand 15 states and 2154 transitions. [2023-08-31 03:50:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 271 transitions, 3503 flow [2023-08-31 03:50:19,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 271 transitions, 3385 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-08-31 03:50:19,008 INFO L231 Difference]: Finished difference. Result has 168 places, 181 transitions, 2423 flow [2023-08-31 03:50:19,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2423, PETRI_PLACES=168, PETRI_TRANSITIONS=181} [2023-08-31 03:50:19,009 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2023-08-31 03:50:19,009 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 181 transitions, 2423 flow [2023-08-31 03:50:19,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 139.6) internal successors, (3490), 25 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:19,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:19,009 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:19,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:19,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:19,210 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:19,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1021162570, now seen corresponding path program 14 times [2023-08-31 03:50:19,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:19,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839671538] [2023-08-31 03:50:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:19,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 03:50:19,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:19,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839671538] [2023-08-31 03:50:19,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839671538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:19,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131505123] [2023-08-31 03:50:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:50:19,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:19,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:19,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:50:19,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:50:19,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:19,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:50:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 03:50:19,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 03:50:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131505123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:19,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-08-31 03:50:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856568486] [2023-08-31 03:50:19,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:19,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:50:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:50:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:50:19,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 328 [2023-08-31 03:50:19,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 181 transitions, 2423 flow. Second operand has 19 states, 19 states have (on average 148.94736842105263) internal successors, (2830), 19 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:19,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:19,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 328 [2023-08-31 03:50:19,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:22,392 INFO L130 PetriNetUnfolder]: 11936/16724 cut-off events. [2023-08-31 03:50:22,393 INFO L131 PetriNetUnfolder]: For 107878/108036 co-relation queries the response was YES. [2023-08-31 03:50:22,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94725 conditions, 16724 events. 11936/16724 cut-off events. For 107878/108036 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 81503 event pairs, 571 based on Foata normal form. 258/16982 useless extension candidates. Maximal degree in co-relation 94632. Up to 3428 conditions per place. [2023-08-31 03:50:22,503 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 553 selfloop transitions, 159 changer transitions 85/801 dead transitions. [2023-08-31 03:50:22,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 801 transitions, 8120 flow [2023-08-31 03:50:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 03:50:22,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 03:50:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6791 transitions. [2023-08-31 03:50:22,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48149461145774247 [2023-08-31 03:50:22,508 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6791 transitions. [2023-08-31 03:50:22,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6791 transitions. [2023-08-31 03:50:22,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:22,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6791 transitions. [2023-08-31 03:50:22,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 157.93023255813952) internal successors, (6791), 43 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:22,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 328.0) internal successors, (14432), 44 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:22,522 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 328.0) internal successors, (14432), 44 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:22,522 INFO L175 Difference]: Start difference. First operand has 168 places, 181 transitions, 2423 flow. Second operand 43 states and 6791 transitions. [2023-08-31 03:50:22,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 801 transitions, 8120 flow [2023-08-31 03:50:23,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 801 transitions, 8012 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-31 03:50:23,489 INFO L231 Difference]: Finished difference. Result has 206 places, 233 transitions, 3574 flow [2023-08-31 03:50:23,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3574, PETRI_PLACES=206, PETRI_TRANSITIONS=233} [2023-08-31 03:50:23,489 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 173 predicate places. [2023-08-31 03:50:23,489 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 233 transitions, 3574 flow [2023-08-31 03:50:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 148.94736842105263) internal successors, (2830), 19 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:23,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:50:23,490 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:23,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 03:50:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:23,690 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 03:50:23,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:50:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1430726769, now seen corresponding path program 15 times [2023-08-31 03:50:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:50:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256517818] [2023-08-31 03:50:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:50:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:50:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:50:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-31 03:50:23,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:50:23,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256517818] [2023-08-31 03:50:23,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256517818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:50:23,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468240861] [2023-08-31 03:50:23,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:50:23,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:50:23,899 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:50:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:50:24,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:50:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:50:24,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 03:50:24,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:50:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 03:50:24,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:50:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 03:50:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468240861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:50:24,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:50:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2023-08-31 03:50:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55640486] [2023-08-31 03:50:24,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:50:24,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:50:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:50:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:50:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:50:24,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 328 [2023-08-31 03:50:24,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 233 transitions, 3574 flow. Second operand has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:24,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:50:24,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 328 [2023-08-31 03:50:24,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:50:29,352 INFO L130 PetriNetUnfolder]: 19835/27920 cut-off events. [2023-08-31 03:50:29,352 INFO L131 PetriNetUnfolder]: For 210916/211176 co-relation queries the response was YES. [2023-08-31 03:50:29,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166503 conditions, 27920 events. 19835/27920 cut-off events. For 210916/211176 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 150296 event pairs, 192 based on Foata normal form. 586/28506 useless extension candidates. Maximal degree in co-relation 159348. Up to 5793 conditions per place. [2023-08-31 03:50:29,486 INFO L137 encePairwiseOnDemand]: 314/328 looper letters, 0 selfloop transitions, 0 changer transitions 1270/1270 dead transitions. [2023-08-31 03:50:29,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1270 transitions, 18792 flow [2023-08-31 03:50:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 03:50:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 03:50:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6783 transitions. [2023-08-31 03:50:29,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220383275261324 [2023-08-31 03:50:29,493 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6783 transitions. [2023-08-31 03:50:29,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6783 transitions. [2023-08-31 03:50:29,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:50:29,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6783 transitions. [2023-08-31 03:50:29,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 138.42857142857142) internal successors, (6783), 49 states have internal predecessors, (6783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:29,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 328.0) internal successors, (16400), 50 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:29,509 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 328.0) internal successors, (16400), 50 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:29,509 INFO L175 Difference]: Start difference. First operand has 206 places, 233 transitions, 3574 flow. Second operand 49 states and 6783 transitions. [2023-08-31 03:50:29,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1270 transitions, 18792 flow [2023-08-31 03:50:31,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1270 transitions, 16260 flow, removed 293 selfloop flow, removed 32 redundant places. [2023-08-31 03:50:31,610 INFO L231 Difference]: Finished difference. Result has 219 places, 0 transitions, 0 flow [2023-08-31 03:50:31,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=0, PETRI_PLACES=219, PETRI_TRANSITIONS=0} [2023-08-31 03:50:31,610 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 186 predicate places. [2023-08-31 03:50:31,611 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 0 transitions, 0 flow [2023-08-31 03:50:31,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:50:31,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-31 03:50:31,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-31 03:50:31,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-31 03:50:31,613 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-31 03:50:31,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 03:50:31,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:50:31,814 INFO L445 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:50:31,816 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 03:50:31,816 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 03:50:31,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 03:50:31 BasicIcfg [2023-08-31 03:50:31,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 03:50:31,818 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 03:50:31,818 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 03:50:31,819 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 03:50:31,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:49:40" (3/4) ... [2023-08-31 03:50:31,820 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 03:50:31,824 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-31 03:50:31,824 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-31 03:50:31,824 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-08-31 03:50:31,828 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2023-08-31 03:50:31,828 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-31 03:50:31,828 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-31 03:50:31,829 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-31 03:50:31,853 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 03:50:31,854 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 03:50:31,854 INFO L158 Benchmark]: Toolchain (without parser) took 51690.02ms. Allocated memory was 75.5MB in the beginning and 6.6GB in the end (delta: 6.6GB). Free memory was 53.0MB in the beginning and 5.1GB in the end (delta: -5.1GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2023-08-31 03:50:31,854 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 51.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 03:50:31,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.27ms. Allocated memory is still 75.5MB. Free memory was 52.8MB in the beginning and 41.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-31 03:50:31,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.25ms. Allocated memory is still 75.5MB. Free memory was 41.2MB in the beginning and 39.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 03:50:31,855 INFO L158 Benchmark]: Boogie Preprocessor took 48.19ms. Allocated memory is still 75.5MB. Free memory was 39.4MB in the beginning and 37.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 03:50:31,855 INFO L158 Benchmark]: RCFGBuilder took 467.55ms. Allocated memory is still 75.5MB. Free memory was 37.7MB in the beginning and 40.0MB in the end (delta: -2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-31 03:50:31,855 INFO L158 Benchmark]: TraceAbstraction took 50894.84ms. Allocated memory was 75.5MB in the beginning and 6.6GB in the end (delta: 6.6GB). Free memory was 39.4MB in the beginning and 5.1GB in the end (delta: -5.1GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2023-08-31 03:50:31,855 INFO L158 Benchmark]: Witness Printer took 35.38ms. Allocated memory is still 6.6GB. Free memory was 5.1GB in the beginning and 5.1GB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 03:50:31,860 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 36.3MB in the beginning and 36.2MB in the end (delta: 51.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.27ms. Allocated memory is still 75.5MB. Free memory was 52.8MB in the beginning and 41.4MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.25ms. Allocated memory is still 75.5MB. Free memory was 41.2MB in the beginning and 39.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.19ms. Allocated memory is still 75.5MB. Free memory was 39.4MB in the beginning and 37.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 467.55ms. Allocated memory is still 75.5MB. Free memory was 37.7MB in the beginning and 40.0MB in the end (delta: -2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 50894.84ms. Allocated memory was 75.5MB in the beginning and 6.6GB in the end (delta: 6.6GB). Free memory was 39.4MB in the beginning and 5.1GB in the end (delta: -5.1GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. * Witness Printer took 35.38ms. Allocated memory is still 6.6GB. Free memory was 5.1GB in the beginning and 5.1GB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 155 PlacesBefore, 33 PlacesAfterwards, 161 TransitionsBefore, 29 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 7 FixpointIterations, 84 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 154 TotalNumberOfCompositions, 2460 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2032, independent: 1969, independent conditional: 0, independent unconditional: 1969, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 921, independent: 904, independent conditional: 0, independent unconditional: 904, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2032, independent: 1065, independent conditional: 0, independent unconditional: 1065, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 921, unknown conditional: 0, unknown unconditional: 921] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 84, Positive conditional cache size: 0, Positive unconditional cache size: 84, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 103]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 194 locations, 4 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: 50.7s, OverallIterations: 22, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 33.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9246 SdHoareTripleChecker+Valid, 8.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8308 mSDsluCounter, 4756 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4531 mSDsCounter, 393 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21310 IncrementalHoareTripleChecker+Invalid, 21703 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 393 mSolverCounterUnsat, 225 mSDtfsCounter, 21310 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1682 GetRequests, 1158 SyntacticMatches, 51 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3574occurred in iteration=21, InterpolantAutomatonStates: 316, 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: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 1406 NumberOfCodeBlocks, 1386 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2004 ConstructedInterpolants, 0 QuantifiedInterpolants, 5986 SizeOfPredicates, 61 NumberOfNonLiveVariables, 5492 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 1083/1438 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-31 03:50:31,883 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 Result: TRUE