./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.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-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --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 03:33:18,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:33:18,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:33:18,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:33:18,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:33:18,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:33:18,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:33:18,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:33:18,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:33:18,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:33:18,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:33:18,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:33:18,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:33:18,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:33:18,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:33:18,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:33:18,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:33:18,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:33:18,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:33:18,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:33:18,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:33:18,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:33:18,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:33:18,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:33:18,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:33:18,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:33:18,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:33:18,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:33:18,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:33:18,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:33:18,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:33:18,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:33:18,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:33:18,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:33:18,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:33:18,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:33:18,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:33:18,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:33:18,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:33:18,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:33:18,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:33:18,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:33:18,630 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:33:18,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:33:18,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:33:18,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:33:18,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:33:18,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:33:18,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:33:18,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:33:18,633 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:33:18,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:33:18,634 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:33:18,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:33:18,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:33:18,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:33:18,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:33:18,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:33:18,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:33:18,635 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:33:18,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:33:18,636 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:33:18,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:33:18,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:33:18,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:33:18,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:33:18,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:33:18,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:33:18,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:33:18,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:33:18,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:33:18,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:33:18,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:33:18,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:33:18,638 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:33:18,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:33:18,639 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:33:18,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:33:18,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:33:18,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:33:18,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:33:18,966 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:33:18,969 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:33:18,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-31 03:33:20,189 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:33:20,367 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:33:20,368 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-31 03:33:20,375 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/859c4502d/d8a8f68f6b0541bda899d133b990af94/FLAG2a727c386 [2023-08-31 03:33:20,400 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/859c4502d/d8a8f68f6b0541bda899d133b990af94 [2023-08-31 03:33:20,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:33:20,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:33:20,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:33:20,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:33:20,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:33:20,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5697490d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20, skipping insertion in model container [2023-08-31 03:33:20,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:33:20,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:33:20,582 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-31 03:33:20,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:33:20,596 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:33:20,622 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-31 03:33:20,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:33:20,635 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:33:20,635 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:33:20,641 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:33:20,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20 WrapperNode [2023-08-31 03:33:20,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:33:20,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:33:20,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:33:20,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:33:20,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,679 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-08-31 03:33:20,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:33:20,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:33:20,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:33:20,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:33:20,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,714 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:33:20,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:33:20,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:33:20,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:33:20,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (1/1) ... [2023-08-31 03:33:20,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:33:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:20,749 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 03:33:20,776 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 03:33:20,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:33:20,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:33:20,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:33:20,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:33:20,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:33:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:33:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:33:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:33:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:33:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:33:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:33:20,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:33:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:33:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:33:20,793 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 03:33:20,891 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:33:20,893 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:33:21,144 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:33:21,202 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:33:21,205 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 03:33:21,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:33:21 BoogieIcfgContainer [2023-08-31 03:33:21,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:33:21,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:33:21,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:33:21,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:33:21,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:33:20" (1/3) ... [2023-08-31 03:33:21,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1037ab51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:33:21, skipping insertion in model container [2023-08-31 03:33:21,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:33:20" (2/3) ... [2023-08-31 03:33:21,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1037ab51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:33:21, skipping insertion in model container [2023-08-31 03:33:21,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:33:21" (3/3) ... [2023-08-31 03:33:21,215 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-31 03:33:21,222 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:33:21,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:33:21,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:33:21,231 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:33:21,304 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:33:21,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-08-31 03:33:21,404 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-08-31 03:33:21,405 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:33:21,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-31 03:33:21,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-08-31 03:33:21,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-08-31 03:33:21,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:33:21,425 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-08-31 03:33:21,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-08-31 03:33:21,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-08-31 03:33:21,467 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-08-31 03:33:21,472 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:33:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-31 03:33:21,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-08-31 03:33:23,572 INFO L134 LiptonReduction]: Checked pairs total: 449 [2023-08-31 03:33:23,573 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-31 03:33:23,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:33:23,588 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;@4076136c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:33:23,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:33:23,592 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 03:33:23,592 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:33:23,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:23,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:23,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:23,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash -507941003, now seen corresponding path program 1 times [2023-08-31 03:33:23,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747019328] [2023-08-31 03:33:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:23,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:24,056 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 03:33:24,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747019328] [2023-08-31 03:33:24,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747019328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:33:24,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:33:24,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:33:24,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999018440] [2023-08-31 03:33:24,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:33:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:33:24,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:24,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:33:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:33:24,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-08-31 03:33:24,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 03:33:24,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:24,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-08-31 03:33:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:24,182 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-08-31 03:33:24,182 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 03:33:24,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 95 events. 54/95 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 238 event pairs, 10 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 160. Up to 73 conditions per place. [2023-08-31 03:33:24,186 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-31 03:33:24,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-31 03:33:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:33:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:33:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-31 03:33:24,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2023-08-31 03:33:24,209 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-31 03:33:24,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-31 03:33:24,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:24,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-31 03:33:24,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:33:24,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 03:33:24,220 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 03:33:24,222 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-08-31 03:33:24,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-31 03:33:24,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:33:24,225 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-31 03:33:24,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-31 03:33:24,229 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-31 03:33:24,229 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-31 03:33:24,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 03:33:24,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:24,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:24,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:33:24,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:24,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:24,231 INFO L85 PathProgramCache]: Analyzing trace with hash -259176130, now seen corresponding path program 1 times [2023-08-31 03:33:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:24,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164575739] [2023-08-31 03:33:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:33:24,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164575739] [2023-08-31 03:33:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164575739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:33:24,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:33:24,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:33:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307742848] [2023-08-31 03:33:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:33:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:33:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:33:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:33:24,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 145 [2023-08-31 03:33:24,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 03:33:24,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:24,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 145 [2023-08-31 03:33:24,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:24,411 INFO L130 PetriNetUnfolder]: 51/93 cut-off events. [2023-08-31 03:33:24,412 INFO L131 PetriNetUnfolder]: For 22/31 co-relation queries the response was YES. [2023-08-31 03:33:24,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 93 events. 51/93 cut-off events. For 22/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 204 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 154. Up to 73 conditions per place. [2023-08-31 03:33:24,413 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-31 03:33:24,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-08-31 03:33:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:33:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:33:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-08-31 03:33:24,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47758620689655173 [2023-08-31 03:33:24,415 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-08-31 03:33:24,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-08-31 03:33:24,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:24,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-08-31 03:33:24,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 03:33:24,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 03:33:24,419 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 03:33:24,419 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 277 transitions. [2023-08-31 03:33:24,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-08-31 03:33:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 03:33:24,421 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-08-31 03:33:24,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-31 03:33:24,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-08-31 03:33:24,422 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-08-31 03:33:24,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 03:33:24,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:24,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:24,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:33:24,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:24,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:24,423 INFO L85 PathProgramCache]: Analyzing trace with hash 746860219, now seen corresponding path program 1 times [2023-08-31 03:33:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:24,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224344689] [2023-08-31 03:33:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:24,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224344689] [2023-08-31 03:33:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224344689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334453878] [2023-08-31 03:33:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:24,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:24,669 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 03:33:24,695 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 03:33:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:25,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334453878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:25,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:25,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 03:33:25,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34001213] [2023-08-31 03:33:25,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:25,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:33:25,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:25,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:33:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:33:25,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:25,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 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 03:33:25,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:25,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:25,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:26,044 INFO L130 PetriNetUnfolder]: 167/315 cut-off events. [2023-08-31 03:33:26,044 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-31 03:33:26,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 315 events. 167/315 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 5 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 238. Up to 109 conditions per place. [2023-08-31 03:33:26,047 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 53 selfloop transitions, 26 changer transitions 39/118 dead transitions. [2023-08-31 03:33:26,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 118 transitions, 612 flow [2023-08-31 03:33:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 03:33:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 03:33:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1160 transitions. [2023-08-31 03:33:26,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-31 03:33:26,052 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1160 transitions. [2023-08-31 03:33:26,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1160 transitions. [2023-08-31 03:33:26,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:26,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1160 transitions. [2023-08-31 03:33:26,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.44444444444444) internal successors, (1160), 18 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 03:33:26,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 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 03:33:26,063 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 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 03:33:26,063 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 18 states and 1160 transitions. [2023-08-31 03:33:26,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 118 transitions, 612 flow [2023-08-31 03:33:26,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 118 transitions, 580 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-31 03:33:26,067 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 249 flow [2023-08-31 03:33:26,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=249, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-31 03:33:26,068 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-08-31 03:33:26,068 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 249 flow [2023-08-31 03:33:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 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 03:33:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:26,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:26,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:26,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:26,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:26,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 979621307, now seen corresponding path program 2 times [2023-08-31 03:33:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:26,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575079378] [2023-08-31 03:33:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:26,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575079378] [2023-08-31 03:33:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575079378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:26,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088551774] [2023-08-31 03:33:26,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:33:26,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:26,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:26,505 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 03:33:26,533 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 03:33:26,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:33:26,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:26,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:26,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088551774] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:26,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:26,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:33:26,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858574000] [2023-08-31 03:33:26,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:33:26,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:26,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:33:26,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:33:27,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:27,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 249 flow. Second operand has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 03:33:27,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:27,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:27,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:28,457 INFO L130 PetriNetUnfolder]: 304/598 cut-off events. [2023-08-31 03:33:28,457 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-08-31 03:33:28,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 598 events. 304/598 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2830 event pairs, 31 based on Foata normal form. 10/604 useless extension candidates. Maximal degree in co-relation 2310. Up to 228 conditions per place. [2023-08-31 03:33:28,464 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 95 selfloop transitions, 40 changer transitions 70/205 dead transitions. [2023-08-31 03:33:28,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1461 flow [2023-08-31 03:33:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:33:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:33:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2220 transitions. [2023-08-31 03:33:28,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374384236453202 [2023-08-31 03:33:28,471 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2220 transitions. [2023-08-31 03:33:28,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2220 transitions. [2023-08-31 03:33:28,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:28,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2220 transitions. [2023-08-31 03:33:28,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.42857142857143) internal successors, (2220), 35 states have internal predecessors, (2220), 0 states have call successors, (0), 0 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 03:33:28,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 03:33:28,488 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 03:33:28,488 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 249 flow. Second operand 35 states and 2220 transitions. [2023-08-31 03:33:28,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1461 flow [2023-08-31 03:33:28,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 205 transitions, 1286 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-08-31 03:33:28,505 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 613 flow [2023-08-31 03:33:28,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=613, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2023-08-31 03:33:28,506 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-08-31 03:33:28,507 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 613 flow [2023-08-31 03:33:28,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 03:33:28,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:28,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:28,519 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 03:33:28,713 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 03:33:28,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:28,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:28,715 INFO L85 PathProgramCache]: Analyzing trace with hash -632437385, now seen corresponding path program 3 times [2023-08-31 03:33:28,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:28,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857543770] [2023-08-31 03:33:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:28,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857543770] [2023-08-31 03:33:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857543770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:28,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679454248] [2023-08-31 03:33:28,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:33:28,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:28,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:28,947 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 03:33:28,974 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 03:33:29,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:33:29,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:29,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:29,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679454248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:29,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:29,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 03:33:29,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193476074] [2023-08-31 03:33:29,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:33:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:33:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:33:29,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:29,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 613 flow. Second operand has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 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 03:33:29,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:29,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:29,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:30,157 INFO L130 PetriNetUnfolder]: 289/582 cut-off events. [2023-08-31 03:33:30,158 INFO L131 PetriNetUnfolder]: For 5801/5801 co-relation queries the response was YES. [2023-08-31 03:33:30,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 582 events. 289/582 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2838 event pairs, 17 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 2915. Up to 159 conditions per place. [2023-08-31 03:33:30,164 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 73 selfloop transitions, 50 changer transitions 47/170 dead transitions. [2023-08-31 03:33:30,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1577 flow [2023-08-31 03:33:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 03:33:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 03:33:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1409 transitions. [2023-08-31 03:33:30,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441692789968652 [2023-08-31 03:33:30,168 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1409 transitions. [2023-08-31 03:33:30,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1409 transitions. [2023-08-31 03:33:30,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:30,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1409 transitions. [2023-08-31 03:33:30,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.04545454545455) internal successors, (1409), 22 states have internal predecessors, (1409), 0 states have call successors, (0), 0 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 03:33:30,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 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 03:33:30,177 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 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 03:33:30,177 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 613 flow. Second operand 22 states and 1409 transitions. [2023-08-31 03:33:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1577 flow [2023-08-31 03:33:30,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1367 flow, removed 104 selfloop flow, removed 11 redundant places. [2023-08-31 03:33:30,201 INFO L231 Difference]: Finished difference. Result has 107 places, 80 transitions, 699 flow [2023-08-31 03:33:30,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=699, PETRI_PLACES=107, PETRI_TRANSITIONS=80} [2023-08-31 03:33:30,202 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-08-31 03:33:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 80 transitions, 699 flow [2023-08-31 03:33:30,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 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 03:33:30,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:30,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:30,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:30,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:30,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:30,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2086276037, now seen corresponding path program 4 times [2023-08-31 03:33:30,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:30,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526463402] [2023-08-31 03:33:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:30,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:30,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526463402] [2023-08-31 03:33:30,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526463402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780565133] [2023-08-31 03:33:30,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:33:30,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:30,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:30,618 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 03:33:30,643 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 03:33:30,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:33:30,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:30,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:31,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780565133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:31,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:31,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 03:33:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724221838] [2023-08-31 03:33:31,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:31,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:33:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:33:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:33:31,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:31,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 80 transitions, 699 flow. Second operand has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 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 03:33:31,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:31,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:31,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:31,762 INFO L130 PetriNetUnfolder]: 295/603 cut-off events. [2023-08-31 03:33:31,762 INFO L131 PetriNetUnfolder]: For 6131/6131 co-relation queries the response was YES. [2023-08-31 03:33:31,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 603 events. 295/603 cut-off events. For 6131/6131 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2999 event pairs, 29 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3086. Up to 160 conditions per place. [2023-08-31 03:33:31,767 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 61 changer transitions 22/173 dead transitions. [2023-08-31 03:33:31,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1710 flow [2023-08-31 03:33:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 03:33:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 03:33:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1411 transitions. [2023-08-31 03:33:31,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44231974921630096 [2023-08-31 03:33:31,771 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1411 transitions. [2023-08-31 03:33:31,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1411 transitions. [2023-08-31 03:33:31,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:31,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1411 transitions. [2023-08-31 03:33:31,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 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 03:33:31,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 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 03:33:31,780 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 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 03:33:31,780 INFO L175 Difference]: Start difference. First operand has 107 places, 80 transitions, 699 flow. Second operand 22 states and 1411 transitions. [2023-08-31 03:33:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1710 flow [2023-08-31 03:33:31,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1478 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-08-31 03:33:31,821 INFO L231 Difference]: Finished difference. Result has 115 places, 91 transitions, 853 flow [2023-08-31 03:33:31,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=853, PETRI_PLACES=115, PETRI_TRANSITIONS=91} [2023-08-31 03:33:31,822 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-08-31 03:33:31,823 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 91 transitions, 853 flow [2023-08-31 03:33:31,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.8) internal successors, (1196), 20 states have internal predecessors, (1196), 0 states have call successors, (0), 0 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 03:33:31,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:31,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:31,839 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 03:33:32,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:32,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:32,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1344414463, now seen corresponding path program 5 times [2023-08-31 03:33:32,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:32,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764719701] [2023-08-31 03:33:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:32,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:32,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764719701] [2023-08-31 03:33:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764719701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98484365] [2023-08-31 03:33:32,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:33:32,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:32,196 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 03:33:32,220 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 03:33:32,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:33:32,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:33:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:32,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:32,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98484365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:32,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:32,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-31 03:33:32,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703251473] [2023-08-31 03:33:32,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:32,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:33:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:33:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:33:32,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:32,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 91 transitions, 853 flow. Second operand has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 03:33:32,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:32,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:33,519 INFO L130 PetriNetUnfolder]: 277/579 cut-off events. [2023-08-31 03:33:33,520 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-08-31 03:33:33,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 579 events. 277/579 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2886 event pairs, 5 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 2934. Up to 300 conditions per place. [2023-08-31 03:33:33,524 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 80 selfloop transitions, 49 changer transitions 20/149 dead transitions. [2023-08-31 03:33:33,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 1482 flow [2023-08-31 03:33:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:33:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:33:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1081 transitions. [2023-08-31 03:33:33,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385395537525355 [2023-08-31 03:33:33,529 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1081 transitions. [2023-08-31 03:33:33,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1081 transitions. [2023-08-31 03:33:33,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:33,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1081 transitions. [2023-08-31 03:33:33,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.588235294117645) internal successors, (1081), 17 states have internal predecessors, (1081), 0 states have call successors, (0), 0 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 03:33:33,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 03:33:33,535 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 03:33:33,536 INFO L175 Difference]: Start difference. First operand has 115 places, 91 transitions, 853 flow. Second operand 17 states and 1081 transitions. [2023-08-31 03:33:33,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 1482 flow [2023-08-31 03:33:33,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1285 flow, removed 43 selfloop flow, removed 13 redundant places. [2023-08-31 03:33:33,553 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 879 flow [2023-08-31 03:33:33,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=879, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2023-08-31 03:33:33,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-08-31 03:33:33,555 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 879 flow [2023-08-31 03:33:33,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 03:33:33,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:33,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:33,566 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 03:33:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:33,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:33,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash 538396011, now seen corresponding path program 6 times [2023-08-31 03:33:33,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133328878] [2023-08-31 03:33:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:33,825 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 03:33:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133328878] [2023-08-31 03:33:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133328878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:33,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696938040] [2023-08-31 03:33:33,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:33:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:33,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:33,827 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 03:33:33,844 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 03:33:33,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 03:33:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 03:33:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:33,910 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 03:33:33,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:33,927 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 03:33:33,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696938040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:33,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:33,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-31 03:33:33,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816274345] [2023-08-31 03:33:33,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 03:33:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 03:33:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-31 03:33:33,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 145 [2023-08-31 03:33:33,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:33:33,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:33,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 145 [2023-08-31 03:33:33,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:34,032 INFO L130 PetriNetUnfolder]: 237/471 cut-off events. [2023-08-31 03:33:34,032 INFO L131 PetriNetUnfolder]: For 5720/5720 co-relation queries the response was YES. [2023-08-31 03:33:34,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 471 events. 237/471 cut-off events. For 5720/5720 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2059 event pairs, 30 based on Foata normal form. 20/486 useless extension candidates. Maximal degree in co-relation 2415. Up to 401 conditions per place. [2023-08-31 03:33:34,036 INFO L137 encePairwiseOnDemand]: 140/145 looper letters, 79 selfloop transitions, 17 changer transitions 2/101 dead transitions. [2023-08-31 03:33:34,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 101 transitions, 1050 flow [2023-08-31 03:33:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:33:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:33:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 417 transitions. [2023-08-31 03:33:34,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793103448275862 [2023-08-31 03:33:34,038 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 417 transitions. [2023-08-31 03:33:34,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 417 transitions. [2023-08-31 03:33:34,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:34,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 417 transitions. [2023-08-31 03:33:34,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.5) internal successors, (417), 6 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 03:33:34,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 03:33:34,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 03:33:34,065 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 879 flow. Second operand 6 states and 417 transitions. [2023-08-31 03:33:34,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 101 transitions, 1050 flow [2023-08-31 03:33:34,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 949 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-31 03:33:34,082 INFO L231 Difference]: Finished difference. Result has 112 places, 86 transitions, 724 flow [2023-08-31 03:33:34,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=112, PETRI_TRANSITIONS=86} [2023-08-31 03:33:34,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-08-31 03:33:34,085 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 86 transitions, 724 flow [2023-08-31 03:33:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:33:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:34,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:34,095 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 03:33:34,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:34,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:34,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1447872089, now seen corresponding path program 7 times [2023-08-31 03:33:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:34,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360660645] [2023-08-31 03:33:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360660645] [2023-08-31 03:33:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360660645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990607099] [2023-08-31 03:33:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:33:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:34,478 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 03:33:34,481 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 03:33:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:34,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:34,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:34,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:34,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990607099] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:34,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:34,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:33:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389987502] [2023-08-31 03:33:34,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:33:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:33:34,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:33:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:35,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 86 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 59.8421052631579) internal successors, (1137), 19 states have internal predecessors, (1137), 0 states have call successors, (0), 0 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 03:33:35,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:35,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:35,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:36,092 INFO L130 PetriNetUnfolder]: 333/677 cut-off events. [2023-08-31 03:33:36,093 INFO L131 PetriNetUnfolder]: For 8509/8509 co-relation queries the response was YES. [2023-08-31 03:33:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 677 events. 333/677 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3447 event pairs, 29 based on Foata normal form. 4/679 useless extension candidates. Maximal degree in co-relation 3559. Up to 272 conditions per place. [2023-08-31 03:33:36,098 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 105 selfloop transitions, 53 changer transitions 67/225 dead transitions. [2023-08-31 03:33:36,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2130 flow [2023-08-31 03:33:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:33:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:33:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2210 transitions. [2023-08-31 03:33:36,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354679802955665 [2023-08-31 03:33:36,102 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2210 transitions. [2023-08-31 03:33:36,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2210 transitions. [2023-08-31 03:33:36,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:36,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2210 transitions. [2023-08-31 03:33:36,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.142857142857146) internal successors, (2210), 35 states have internal predecessors, (2210), 0 states have call successors, (0), 0 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 03:33:36,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 03:33:36,114 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 03:33:36,115 INFO L175 Difference]: Start difference. First operand has 112 places, 86 transitions, 724 flow. Second operand 35 states and 2210 transitions. [2023-08-31 03:33:36,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2130 flow [2023-08-31 03:33:36,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2039 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-08-31 03:33:36,143 INFO L231 Difference]: Finished difference. Result has 151 places, 98 transitions, 1039 flow [2023-08-31 03:33:36,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1039, PETRI_PLACES=151, PETRI_TRANSITIONS=98} [2023-08-31 03:33:36,144 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-08-31 03:33:36,144 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 98 transitions, 1039 flow [2023-08-31 03:33:36,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.8421052631579) internal successors, (1137), 19 states have internal predecessors, (1137), 0 states have call successors, (0), 0 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 03:33:36,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:36,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:36,154 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 03:33:36,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:36,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:36,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1306012647, now seen corresponding path program 8 times [2023-08-31 03:33:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:36,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437258494] [2023-08-31 03:33:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:36,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:36,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437258494] [2023-08-31 03:33:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437258494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:36,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221749919] [2023-08-31 03:33:36,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:33:36,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:36,543 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 03:33:36,564 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 03:33:36,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:33:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:36,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:36,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:36,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221749919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:36,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:36,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:33:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989797597] [2023-08-31 03:33:36,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:33:36,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:33:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:33:37,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:37,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 98 transitions, 1039 flow. Second operand has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 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 03:33:37,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:37,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:37,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:37,957 INFO L130 PetriNetUnfolder]: 291/615 cut-off events. [2023-08-31 03:33:37,957 INFO L131 PetriNetUnfolder]: For 12380/12380 co-relation queries the response was YES. [2023-08-31 03:33:37,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 615 events. 291/615 cut-off events. For 12380/12380 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3168 event pairs, 29 based on Foata normal form. 7/620 useless extension candidates. Maximal degree in co-relation 3930. Up to 267 conditions per place. [2023-08-31 03:33:37,963 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 113 selfloop transitions, 63 changer transitions 26/202 dead transitions. [2023-08-31 03:33:37,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2273 flow [2023-08-31 03:33:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:33:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:33:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1650 transitions. [2023-08-31 03:33:37,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376657824933687 [2023-08-31 03:33:37,966 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1650 transitions. [2023-08-31 03:33:37,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1650 transitions. [2023-08-31 03:33:37,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:37,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1650 transitions. [2023-08-31 03:33:37,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 63.46153846153846) internal successors, (1650), 26 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 03:33:37,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 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 03:33:37,974 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 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 03:33:37,975 INFO L175 Difference]: Start difference. First operand has 151 places, 98 transitions, 1039 flow. Second operand 26 states and 1650 transitions. [2023-08-31 03:33:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2273 flow [2023-08-31 03:33:38,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 1605 flow, removed 250 selfloop flow, removed 37 redundant places. [2023-08-31 03:33:38,004 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1050 flow [2023-08-31 03:33:38,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1050, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2023-08-31 03:33:38,005 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-08-31 03:33:38,005 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1050 flow [2023-08-31 03:33:38,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 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 03:33:38,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:38,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:38,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:38,211 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,SelfDestructingSolverStorable9 [2023-08-31 03:33:38,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:38,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1376530827, now seen corresponding path program 9 times [2023-08-31 03:33:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822913896] [2023-08-31 03:33:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:38,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:38,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822913896] [2023-08-31 03:33:38,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822913896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:38,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526203000] [2023-08-31 03:33:38,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:33:38,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:38,405 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 03:33:38,432 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 03:33:38,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:33:38,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:38,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:38,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526203000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:38,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:38,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:33:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690771981] [2023-08-31 03:33:38,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:33:38,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:33:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:33:38,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:38,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1050 flow. Second operand has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 03:33:38,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:38,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:38,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:39,897 INFO L130 PetriNetUnfolder]: 271/538 cut-off events. [2023-08-31 03:33:39,897 INFO L131 PetriNetUnfolder]: For 6580/6580 co-relation queries the response was YES. [2023-08-31 03:33:39,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 538 events. 271/538 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2489 event pairs, 29 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 2920. Up to 267 conditions per place. [2023-08-31 03:33:39,902 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 91 selfloop transitions, 56 changer transitions 39/186 dead transitions. [2023-08-31 03:33:39,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 186 transitions, 1777 flow [2023-08-31 03:33:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 03:33:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 03:33:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1879 transitions. [2023-08-31 03:33:39,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43195402298850577 [2023-08-31 03:33:39,906 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1879 transitions. [2023-08-31 03:33:39,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1879 transitions. [2023-08-31 03:33:39,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:39,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1879 transitions. [2023-08-31 03:33:39,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.63333333333333) internal successors, (1879), 30 states have internal predecessors, (1879), 0 states have call successors, (0), 0 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 03:33:39,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 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 03:33:39,916 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 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 03:33:39,916 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1050 flow. Second operand 30 states and 1879 transitions. [2023-08-31 03:33:39,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 186 transitions, 1777 flow [2023-08-31 03:33:39,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 1484 flow, removed 114 selfloop flow, removed 18 redundant places. [2023-08-31 03:33:39,938 INFO L231 Difference]: Finished difference. Result has 152 places, 107 transitions, 929 flow [2023-08-31 03:33:39,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=929, PETRI_PLACES=152, PETRI_TRANSITIONS=107} [2023-08-31 03:33:39,939 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-08-31 03:33:39,939 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 107 transitions, 929 flow [2023-08-31 03:33:39,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.89473684210526) internal successors, (1138), 19 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 03:33:39,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:39,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:39,951 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 03:33:40,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:40,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:40,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480629, now seen corresponding path program 10 times [2023-08-31 03:33:40,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:40,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82754628] [2023-08-31 03:33:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:40,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82754628] [2023-08-31 03:33:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82754628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583825122] [2023-08-31 03:33:40,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:33:40,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:40,308 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 03:33:40,316 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 03:33:40,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:33:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:33:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:40,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:40,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583825122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:40,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:40,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 03:33:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651228246] [2023-08-31 03:33:40,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:40,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 03:33:40,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 03:33:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-31 03:33:40,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:40,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 107 transitions, 929 flow. Second operand has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 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 03:33:40,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:40,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:40,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:41,518 INFO L130 PetriNetUnfolder]: 252/497 cut-off events. [2023-08-31 03:33:41,518 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-08-31 03:33:41,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 497 events. 252/497 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2170 event pairs, 11 based on Foata normal form. 5/492 useless extension candidates. Maximal degree in co-relation 2536. Up to 270 conditions per place. [2023-08-31 03:33:41,522 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 121 selfloop transitions, 34 changer transitions 22/177 dead transitions. [2023-08-31 03:33:41,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 177 transitions, 1718 flow [2023-08-31 03:33:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 03:33:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 03:33:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1452 transitions. [2023-08-31 03:33:41,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353823088455772 [2023-08-31 03:33:41,525 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1452 transitions. [2023-08-31 03:33:41,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1452 transitions. [2023-08-31 03:33:41,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:41,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1452 transitions. [2023-08-31 03:33:41,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.130434782608695) internal successors, (1452), 23 states have internal predecessors, (1452), 0 states have call successors, (0), 0 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 03:33:41,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 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 03:33:41,531 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 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 03:33:41,532 INFO L175 Difference]: Start difference. First operand has 152 places, 107 transitions, 929 flow. Second operand 23 states and 1452 transitions. [2023-08-31 03:33:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 177 transitions, 1718 flow [2023-08-31 03:33:41,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 177 transitions, 1503 flow, removed 42 selfloop flow, removed 36 redundant places. [2023-08-31 03:33:41,546 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 872 flow [2023-08-31 03:33:41,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=872, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2023-08-31 03:33:41,547 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-08-31 03:33:41,547 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 872 flow [2023-08-31 03:33:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 59.78947368421053) internal successors, (1136), 19 states have internal predecessors, (1136), 0 states have call successors, (0), 0 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 03:33:41,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:41,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:41,557 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 03:33:41,753 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,SelfDestructingSolverStorable11 [2023-08-31 03:33:41,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:41,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:41,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1918495045, now seen corresponding path program 11 times [2023-08-31 03:33:41,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:41,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323297881] [2023-08-31 03:33:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:41,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323297881] [2023-08-31 03:33:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323297881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:41,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886331094] [2023-08-31 03:33:41,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:33:41,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:41,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:41,915 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 03:33:41,939 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 03:33:41,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:33:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:33:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:42,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886331094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:42,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:42,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-31 03:33:42,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560102426] [2023-08-31 03:33:42,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:33:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:33:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:33:42,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:42,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 872 flow. Second operand has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 03:33:42,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:42,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:42,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:42,787 INFO L130 PetriNetUnfolder]: 224/434 cut-off events. [2023-08-31 03:33:42,787 INFO L131 PetriNetUnfolder]: For 3069/3069 co-relation queries the response was YES. [2023-08-31 03:33:42,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 434 events. 224/434 cut-off events. For 3069/3069 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1755 event pairs, 9 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 2144. Up to 362 conditions per place. [2023-08-31 03:33:42,791 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 98 selfloop transitions, 23 changer transitions 8/129 dead transitions. [2023-08-31 03:33:42,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1214 flow [2023-08-31 03:33:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 03:33:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 03:33:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 690 transitions. [2023-08-31 03:33:42,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43260188087774293 [2023-08-31 03:33:42,794 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 690 transitions. [2023-08-31 03:33:42,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 690 transitions. [2023-08-31 03:33:42,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:42,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 690 transitions. [2023-08-31 03:33:42,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.72727272727273) internal successors, (690), 11 states have internal predecessors, (690), 0 states have call successors, (0), 0 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 03:33:42,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 03:33:42,798 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 03:33:42,798 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 872 flow. Second operand 11 states and 690 transitions. [2023-08-31 03:33:42,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1214 flow [2023-08-31 03:33:42,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 129 transitions, 1116 flow, removed 18 selfloop flow, removed 20 redundant places. [2023-08-31 03:33:42,810 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 859 flow [2023-08-31 03:33:42,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=859, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2023-08-31 03:33:42,812 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-08-31 03:33:42,812 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 859 flow [2023-08-31 03:33:42,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.714285714285715) internal successors, (1254), 21 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 03:33:42,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:42,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:42,817 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 03:33:43,017 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,SelfDestructingSolverStorable12 [2023-08-31 03:33:43,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:43,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:43,017 INFO L85 PathProgramCache]: Analyzing trace with hash -762529050, now seen corresponding path program 12 times [2023-08-31 03:33:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626066600] [2023-08-31 03:33:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:43,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:43,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626066600] [2023-08-31 03:33:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626066600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568968185] [2023-08-31 03:33:43,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:33:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:43,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:43,186 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 03:33:43,210 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 03:33:43,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:33:43,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:43,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568968185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:43,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:43,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-31 03:33:43,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975610687] [2023-08-31 03:33:43,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:43,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:33:43,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:43,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:33:43,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:33:43,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:43,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 859 flow. Second operand has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 03:33:43,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:43,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:43,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:44,393 INFO L130 PetriNetUnfolder]: 277/546 cut-off events. [2023-08-31 03:33:44,394 INFO L131 PetriNetUnfolder]: For 3628/3628 co-relation queries the response was YES. [2023-08-31 03:33:44,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 546 events. 277/546 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2468 event pairs, 11 based on Foata normal form. 4/546 useless extension candidates. Maximal degree in co-relation 2651. Up to 302 conditions per place. [2023-08-31 03:33:44,398 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 71 changer transitions 28/189 dead transitions. [2023-08-31 03:33:44,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1716 flow [2023-08-31 03:33:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:33:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:33:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1509 transitions. [2023-08-31 03:33:44,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336206896551724 [2023-08-31 03:33:44,401 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1509 transitions. [2023-08-31 03:33:44,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1509 transitions. [2023-08-31 03:33:44,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:44,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1509 transitions. [2023-08-31 03:33:44,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 62.875) internal successors, (1509), 24 states have internal predecessors, (1509), 0 states have call successors, (0), 0 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 03:33:44,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 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 03:33:44,407 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 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 03:33:44,407 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 859 flow. Second operand 24 states and 1509 transitions. [2023-08-31 03:33:44,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1716 flow [2023-08-31 03:33:44,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1637 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-08-31 03:33:44,421 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 1208 flow [2023-08-31 03:33:44,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1208, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-08-31 03:33:44,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-08-31 03:33:44,422 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 1208 flow [2023-08-31 03:33:44,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 03:33:44,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:44,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:44,431 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 03:33:44,628 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,SelfDestructingSolverStorable13 [2023-08-31 03:33:44,628 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:44,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -944601462, now seen corresponding path program 13 times [2023-08-31 03:33:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664043176] [2023-08-31 03:33:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664043176] [2023-08-31 03:33:44,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664043176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437791509] [2023-08-31 03:33:44,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:33:44,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:44,800 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 03:33:44,803 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 03:33:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:44,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:44,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:45,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437791509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:45,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:45,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-31 03:33:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527651522] [2023-08-31 03:33:45,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:45,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:33:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:33:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:33:45,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:45,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 1208 flow. Second operand has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 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 03:33:45,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:45,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:45,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:45,938 INFO L130 PetriNetUnfolder]: 368/739 cut-off events. [2023-08-31 03:33:45,938 INFO L131 PetriNetUnfolder]: For 5772/5772 co-relation queries the response was YES. [2023-08-31 03:33:45,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 739 events. 368/739 cut-off events. For 5772/5772 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3741 event pairs, 13 based on Foata normal form. 6/741 useless extension candidates. Maximal degree in co-relation 3945. Up to 205 conditions per place. [2023-08-31 03:33:45,944 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 109 selfloop transitions, 80 changer transitions 67/256 dead transitions. [2023-08-31 03:33:45,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 256 transitions, 2591 flow [2023-08-31 03:33:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 03:33:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 03:33:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1825 transitions. [2023-08-31 03:33:45,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340071343638526 [2023-08-31 03:33:45,947 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1825 transitions. [2023-08-31 03:33:45,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1825 transitions. [2023-08-31 03:33:45,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:45,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1825 transitions. [2023-08-31 03:33:45,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 62.93103448275862) internal successors, (1825), 29 states have internal predecessors, (1825), 0 states have call successors, (0), 0 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 03:33:45,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 03:33:45,954 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 03:33:45,954 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 1208 flow. Second operand 29 states and 1825 transitions. [2023-08-31 03:33:45,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 256 transitions, 2591 flow [2023-08-31 03:33:45,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 256 transitions, 2349 flow, removed 79 selfloop flow, removed 12 redundant places. [2023-08-31 03:33:45,975 INFO L231 Difference]: Finished difference. Result has 173 places, 128 transitions, 1364 flow [2023-08-31 03:33:45,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1364, PETRI_PLACES=173, PETRI_TRANSITIONS=128} [2023-08-31 03:33:45,975 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-08-31 03:33:45,975 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 128 transitions, 1364 flow [2023-08-31 03:33:45,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.72727272727273) internal successors, (1314), 22 states have internal predecessors, (1314), 0 states have call successors, (0), 0 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 03:33:45,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:45,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:45,987 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 03:33:46,181 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,SelfDestructingSolverStorable14 [2023-08-31 03:33:46,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:46,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1875183464, now seen corresponding path program 14 times [2023-08-31 03:33:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456999206] [2023-08-31 03:33:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:46,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:46,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456999206] [2023-08-31 03:33:46,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456999206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:46,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517634445] [2023-08-31 03:33:46,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:33:46,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:46,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:46,363 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 03:33:46,364 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 03:33:46,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:33:46,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:46,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:46,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517634445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:46,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:46,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-31 03:33:46,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532350873] [2023-08-31 03:33:46,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:46,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:33:46,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:33:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:33:46,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:46,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 128 transitions, 1364 flow. Second operand has 23 states, 23 states have (on average 59.73913043478261) internal successors, (1374), 23 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 03:33:46,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:46,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:47,741 INFO L130 PetriNetUnfolder]: 402/798 cut-off events. [2023-08-31 03:33:47,741 INFO L131 PetriNetUnfolder]: For 10464/10464 co-relation queries the response was YES. [2023-08-31 03:33:47,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5262 conditions, 798 events. 402/798 cut-off events. For 10464/10464 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4068 event pairs, 13 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 5137. Up to 223 conditions per place. [2023-08-31 03:33:47,747 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 123 selfloop transitions, 96 changer transitions 32/251 dead transitions. [2023-08-31 03:33:47,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3165 flow [2023-08-31 03:33:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 03:33:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 03:33:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1957 transitions. [2023-08-31 03:33:47,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353726362625139 [2023-08-31 03:33:47,750 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1957 transitions. [2023-08-31 03:33:47,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1957 transitions. [2023-08-31 03:33:47,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:47,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1957 transitions. [2023-08-31 03:33:47,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 63.12903225806452) internal successors, (1957), 31 states have internal predecessors, (1957), 0 states have call successors, (0), 0 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 03:33:47,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 03:33:47,757 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 03:33:47,757 INFO L175 Difference]: Start difference. First operand has 173 places, 128 transitions, 1364 flow. Second operand 31 states and 1957 transitions. [2023-08-31 03:33:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3165 flow [2023-08-31 03:33:47,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 2504 flow, removed 295 selfloop flow, removed 23 redundant places. [2023-08-31 03:33:47,783 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1761 flow [2023-08-31 03:33:47,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1761, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2023-08-31 03:33:47,784 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-08-31 03:33:47,784 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1761 flow [2023-08-31 03:33:47,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.73913043478261) internal successors, (1374), 23 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 03:33:47,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:47,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:47,789 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 03:33:47,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:47,985 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:47,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1804665284, now seen corresponding path program 15 times [2023-08-31 03:33:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467118595] [2023-08-31 03:33:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467118595] [2023-08-31 03:33:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467118595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:48,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450107117] [2023-08-31 03:33:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:33:48,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:48,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:48,176 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 03:33:48,179 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 03:33:48,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:33:48,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:48,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:48,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450107117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:48,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:48,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-31 03:33:48,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036829942] [2023-08-31 03:33:48,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:48,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:33:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:48,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:33:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:33:48,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:48,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1761 flow. Second operand has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 03:33:48,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:48,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:48,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:49,583 INFO L130 PetriNetUnfolder]: 371/747 cut-off events. [2023-08-31 03:33:49,584 INFO L131 PetriNetUnfolder]: For 9071/9071 co-relation queries the response was YES. [2023-08-31 03:33:49,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 747 events. 371/747 cut-off events. For 9071/9071 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3741 event pairs, 11 based on Foata normal form. 5/748 useless extension candidates. Maximal degree in co-relation 4675. Up to 221 conditions per place. [2023-08-31 03:33:49,589 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 120 selfloop transitions, 98 changer transitions 31/249 dead transitions. [2023-08-31 03:33:49,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2918 flow [2023-08-31 03:33:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 03:33:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 03:33:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1833 transitions. [2023-08-31 03:33:49,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359096313912009 [2023-08-31 03:33:49,591 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1833 transitions. [2023-08-31 03:33:49,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1833 transitions. [2023-08-31 03:33:49,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:49,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1833 transitions. [2023-08-31 03:33:49,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 63.206896551724135) internal successors, (1833), 29 states have internal predecessors, (1833), 0 states have call successors, (0), 0 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 03:33:49,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 03:33:49,598 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 03:33:49,598 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1761 flow. Second operand 29 states and 1833 transitions. [2023-08-31 03:33:49,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2918 flow [2023-08-31 03:33:49,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2458 flow, removed 177 selfloop flow, removed 18 redundant places. [2023-08-31 03:33:49,639 INFO L231 Difference]: Finished difference. Result has 190 places, 154 transitions, 1710 flow [2023-08-31 03:33:49,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1710, PETRI_PLACES=190, PETRI_TRANSITIONS=154} [2023-08-31 03:33:49,639 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-08-31 03:33:49,640 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 154 transitions, 1710 flow [2023-08-31 03:33:49,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.65217391304348) internal successors, (1372), 23 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 03:33:49,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:49,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:49,645 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 03:33:49,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:33:49,845 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:49,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:49,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1268773024, now seen corresponding path program 16 times [2023-08-31 03:33:49,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:49,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910843270] [2023-08-31 03:33:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:49,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:50,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:50,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910843270] [2023-08-31 03:33:50,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910843270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:50,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669984140] [2023-08-31 03:33:50,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:33:50,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:50,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:50,017 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 03:33:50,043 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 03:33:50,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:33:50,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:50,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:50,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669984140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:50,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:50,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-31 03:33:50,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561676015] [2023-08-31 03:33:50,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:50,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:33:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:33:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:33:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:50,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 154 transitions, 1710 flow. Second operand has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 0 states have call successors, (0), 0 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 03:33:50,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:50,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:50,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:51,124 INFO L130 PetriNetUnfolder]: 394/790 cut-off events. [2023-08-31 03:33:51,124 INFO L131 PetriNetUnfolder]: For 10103/10103 co-relation queries the response was YES. [2023-08-31 03:33:51,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 790 events. 394/790 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3994 event pairs, 15 based on Foata normal form. 5/791 useless extension candidates. Maximal degree in co-relation 4945. Up to 511 conditions per place. [2023-08-31 03:33:51,130 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 157 selfloop transitions, 41 changer transitions 41/239 dead transitions. [2023-08-31 03:33:51,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 239 transitions, 2764 flow [2023-08-31 03:33:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:33:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:33:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1623 transitions. [2023-08-31 03:33:51,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43050397877984087 [2023-08-31 03:33:51,134 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1623 transitions. [2023-08-31 03:33:51,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1623 transitions. [2023-08-31 03:33:51,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:51,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1623 transitions. [2023-08-31 03:33:51,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 62.42307692307692) internal successors, (1623), 26 states have internal predecessors, (1623), 0 states have call successors, (0), 0 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 03:33:51,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 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 03:33:51,141 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 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 03:33:51,141 INFO L175 Difference]: Start difference. First operand has 190 places, 154 transitions, 1710 flow. Second operand 26 states and 1623 transitions. [2023-08-31 03:33:51,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 239 transitions, 2764 flow [2023-08-31 03:33:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 239 transitions, 2488 flow, removed 61 selfloop flow, removed 23 redundant places. [2023-08-31 03:33:51,170 INFO L231 Difference]: Finished difference. Result has 194 places, 157 transitions, 1684 flow [2023-08-31 03:33:51,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1684, PETRI_PLACES=194, PETRI_TRANSITIONS=157} [2023-08-31 03:33:51,171 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-31 03:33:51,171 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 157 transitions, 1684 flow [2023-08-31 03:33:51,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.76190476190476) internal successors, (1255), 21 states have internal predecessors, (1255), 0 states have call successors, (0), 0 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 03:33:51,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:51,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:51,180 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 03:33:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:33:51,377 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:51,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1188036426, now seen corresponding path program 17 times [2023-08-31 03:33:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:51,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716108633] [2023-08-31 03:33:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:51,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:51,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716108633] [2023-08-31 03:33:51,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716108633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:51,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537973706] [2023-08-31 03:33:51,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:33:51,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:51,537 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 03:33:51,552 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 03:33:51,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:33:51,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:51,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:51,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537973706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:51,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:51,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-31 03:33:51,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415103954] [2023-08-31 03:33:51,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:51,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:33:51,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:51,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:33:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:33:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:52,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 157 transitions, 1684 flow. Second operand has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 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 03:33:52,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:52,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:52,777 INFO L130 PetriNetUnfolder]: 466/942 cut-off events. [2023-08-31 03:33:52,778 INFO L131 PetriNetUnfolder]: For 17504/17504 co-relation queries the response was YES. [2023-08-31 03:33:52,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 942 events. 466/942 cut-off events. For 17504/17504 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4987 event pairs, 19 based on Foata normal form. 7/945 useless extension candidates. Maximal degree in co-relation 6269. Up to 517 conditions per place. [2023-08-31 03:33:52,784 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 178 selfloop transitions, 57 changer transitions 32/267 dead transitions. [2023-08-31 03:33:52,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3232 flow [2023-08-31 03:33:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 03:33:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 03:33:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1698 transitions. [2023-08-31 03:33:52,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337164750957854 [2023-08-31 03:33:52,786 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1698 transitions. [2023-08-31 03:33:52,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1698 transitions. [2023-08-31 03:33:52,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:52,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1698 transitions. [2023-08-31 03:33:52,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 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 03:33:52,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 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 03:33:52,792 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 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 03:33:52,792 INFO L175 Difference]: Start difference. First operand has 194 places, 157 transitions, 1684 flow. Second operand 27 states and 1698 transitions. [2023-08-31 03:33:52,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3232 flow [2023-08-31 03:33:52,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 267 transitions, 2923 flow, removed 128 selfloop flow, removed 18 redundant places. [2023-08-31 03:33:52,820 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 2008 flow [2023-08-31 03:33:52,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2008, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2023-08-31 03:33:52,820 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-08-31 03:33:52,821 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 2008 flow [2023-08-31 03:33:52,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 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 03:33:52,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:52,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:52,827 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 03:33:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:53,027 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:53,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2122586034, now seen corresponding path program 18 times [2023-08-31 03:33:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173645051] [2023-08-31 03:33:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:53,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173645051] [2023-08-31 03:33:53,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173645051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:53,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140291409] [2023-08-31 03:33:53,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:33:53,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:53,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:53,189 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 03:33:53,213 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 03:33:53,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:33:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:53,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 03:33:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:53,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:53,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140291409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:53,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:53,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-31 03:33:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503935767] [2023-08-31 03:33:53,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:33:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:33:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:33:53,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:53,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 2008 flow. Second operand has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 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 03:33:53,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:53,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:53,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:54,714 INFO L130 PetriNetUnfolder]: 556/1126 cut-off events. [2023-08-31 03:33:54,715 INFO L131 PetriNetUnfolder]: For 22866/22866 co-relation queries the response was YES. [2023-08-31 03:33:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1126 events. 556/1126 cut-off events. For 22866/22866 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6267 event pairs, 25 based on Foata normal form. 5/1127 useless extension candidates. Maximal degree in co-relation 7887. Up to 616 conditions per place. [2023-08-31 03:33:54,723 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 191 selfloop transitions, 68 changer transitions 39/298 dead transitions. [2023-08-31 03:33:54,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 298 transitions, 3805 flow [2023-08-31 03:33:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 03:33:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 03:33:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1711 transitions. [2023-08-31 03:33:54,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-08-31 03:33:54,731 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1711 transitions. [2023-08-31 03:33:54,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1711 transitions. [2023-08-31 03:33:54,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:54,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1711 transitions. [2023-08-31 03:33:54,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.370370370370374) internal successors, (1711), 27 states have internal predecessors, (1711), 0 states have call successors, (0), 0 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 03:33:54,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 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 03:33:54,739 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 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 03:33:54,739 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 2008 flow. Second operand 27 states and 1711 transitions. [2023-08-31 03:33:54,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 298 transitions, 3805 flow [2023-08-31 03:33:54,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 298 transitions, 3518 flow, removed 121 selfloop flow, removed 16 redundant places. [2023-08-31 03:33:54,804 INFO L231 Difference]: Finished difference. Result has 222 places, 196 transitions, 2493 flow [2023-08-31 03:33:54,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2493, PETRI_PLACES=222, PETRI_TRANSITIONS=196} [2023-08-31 03:33:54,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-08-31 03:33:54,805 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 196 transitions, 2493 flow [2023-08-31 03:33:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.68181818181818) internal successors, (1313), 22 states have internal predecessors, (1313), 0 states have call successors, (0), 0 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 03:33:54,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:54,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:54,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:55,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:55,011 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:55,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 56355927, now seen corresponding path program 19 times [2023-08-31 03:33:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:55,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591461374] [2023-08-31 03:33:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:55,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591461374] [2023-08-31 03:33:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591461374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435370835] [2023-08-31 03:33:55,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:33:55,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:55,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:33:55,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:33:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:33:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:55,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435370835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:55,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:55,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 03:33:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878871617] [2023-08-31 03:33:55,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:55,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 03:33:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:55,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 03:33:55,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-31 03:33:55,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:55,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 196 transitions, 2493 flow. Second operand has 26 states, 26 states have (on average 59.57692307692308) internal successors, (1549), 26 states have internal predecessors, (1549), 0 states have call successors, (0), 0 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 03:33:55,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:55,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:55,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:57,004 INFO L130 PetriNetUnfolder]: 743/1452 cut-off events. [2023-08-31 03:33:57,004 INFO L131 PetriNetUnfolder]: For 36204/36204 co-relation queries the response was YES. [2023-08-31 03:33:57,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10999 conditions, 1452 events. 743/1452 cut-off events. For 36204/36204 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8361 event pairs, 37 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 10923. Up to 581 conditions per place. [2023-08-31 03:33:57,014 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 189 selfloop transitions, 149 changer transitions 36/374 dead transitions. [2023-08-31 03:33:57,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 4925 flow [2023-08-31 03:33:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 03:33:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 03:33:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2388 transitions. [2023-08-31 03:33:57,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43339382940108895 [2023-08-31 03:33:57,018 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2388 transitions. [2023-08-31 03:33:57,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2388 transitions. [2023-08-31 03:33:57,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:57,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2388 transitions. [2023-08-31 03:33:57,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.8421052631579) internal successors, (2388), 38 states have internal predecessors, (2388), 0 states have call successors, (0), 0 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 03:33:57,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 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 03:33:57,026 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 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 03:33:57,026 INFO L175 Difference]: Start difference. First operand has 222 places, 196 transitions, 2493 flow. Second operand 38 states and 2388 transitions. [2023-08-31 03:33:57,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 4925 flow [2023-08-31 03:33:57,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 4570 flow, removed 145 selfloop flow, removed 15 redundant places. [2023-08-31 03:33:57,171 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 3451 flow [2023-08-31 03:33:57,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3451, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2023-08-31 03:33:57,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-08-31 03:33:57,172 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 3451 flow [2023-08-31 03:33:57,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.57692307692308) internal successors, (1549), 26 states have internal predecessors, (1549), 0 states have call successors, (0), 0 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 03:33:57,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:57,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:57,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:57,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:57,373 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:57,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash -376590837, now seen corresponding path program 20 times [2023-08-31 03:33:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:57,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358648524] [2023-08-31 03:33:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:57,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:57,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:57,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358648524] [2023-08-31 03:33:57,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358648524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:57,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448534089] [2023-08-31 03:33:57,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:33:57,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:57,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:57,561 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:33:57,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:33:57,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:33:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:33:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:33:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:33:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:57,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:33:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:33:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448534089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:33:57,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:33:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-31 03:33:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630332927] [2023-08-31 03:33:57,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:33:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:33:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:33:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:33:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:33:58,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:33:58,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 3451 flow. Second operand has 24 states, 24 states have (on average 59.666666666666664) internal successors, (1432), 24 states have internal predecessors, (1432), 0 states have call successors, (0), 0 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 03:33:58,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:33:58,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:33:58,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:33:59,316 INFO L130 PetriNetUnfolder]: 1024/1951 cut-off events. [2023-08-31 03:33:59,317 INFO L131 PetriNetUnfolder]: For 66721/66721 co-relation queries the response was YES. [2023-08-31 03:33:59,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17262 conditions, 1951 events. 1024/1951 cut-off events. For 66721/66721 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11822 event pairs, 63 based on Foata normal form. 16/1963 useless extension candidates. Maximal degree in co-relation 17179. Up to 915 conditions per place. [2023-08-31 03:33:59,334 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 256 selfloop transitions, 118 changer transitions 89/463 dead transitions. [2023-08-31 03:33:59,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 463 transitions, 7305 flow [2023-08-31 03:33:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-31 03:33:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-31 03:33:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2870 transitions. [2023-08-31 03:33:59,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302848575712144 [2023-08-31 03:33:59,338 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2870 transitions. [2023-08-31 03:33:59,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2870 transitions. [2023-08-31 03:33:59,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:33:59,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2870 transitions. [2023-08-31 03:33:59,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.391304347826086) internal successors, (2870), 46 states have internal predecessors, (2870), 0 states have call successors, (0), 0 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 03:33:59,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 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 03:33:59,346 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 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 03:33:59,347 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 3451 flow. Second operand 46 states and 2870 transitions. [2023-08-31 03:33:59,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 463 transitions, 7305 flow [2023-08-31 03:33:59,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 463 transitions, 6297 flow, removed 432 selfloop flow, removed 25 redundant places. [2023-08-31 03:33:59,594 INFO L231 Difference]: Finished difference. Result has 282 places, 270 transitions, 3999 flow [2023-08-31 03:33:59,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3999, PETRI_PLACES=282, PETRI_TRANSITIONS=270} [2023-08-31 03:33:59,594 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-08-31 03:33:59,595 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 270 transitions, 3999 flow [2023-08-31 03:33:59,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.666666666666664) internal successors, (1432), 24 states have internal predecessors, (1432), 0 states have call successors, (0), 0 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 03:33:59,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:33:59,595 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:33:59,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:33:59,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 03:33:59,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:33:59,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:33:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash -857253995, now seen corresponding path program 21 times [2023-08-31 03:33:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:33:59,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372494322] [2023-08-31 03:33:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:33:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:33:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:33:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:33:59,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:33:59,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372494322] [2023-08-31 03:33:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372494322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:33:59,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502031676] [2023-08-31 03:33:59,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:33:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:33:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:33:59,990 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:00,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:34:00,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:34:00,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:00,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:34:00,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:00,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502031676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:00,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:00,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2023-08-31 03:34:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659466242] [2023-08-31 03:34:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:00,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:34:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:34:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:34:00,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:00,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 270 transitions, 3999 flow. Second operand has 23 states, 23 states have (on average 59.82608695652174) internal successors, (1376), 23 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 03:34:00,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:00,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:00,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:02,119 INFO L130 PetriNetUnfolder]: 1208/2243 cut-off events. [2023-08-31 03:34:02,120 INFO L131 PetriNetUnfolder]: For 95392/95392 co-relation queries the response was YES. [2023-08-31 03:34:02,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 2243 events. 1208/2243 cut-off events. For 95392/95392 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13533 event pairs, 83 based on Foata normal form. 8/2247 useless extension candidates. Maximal degree in co-relation 21847. Up to 1364 conditions per place. [2023-08-31 03:34:02,139 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 291 selfloop transitions, 162 changer transitions 32/485 dead transitions. [2023-08-31 03:34:02,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 485 transitions, 8434 flow [2023-08-31 03:34:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-31 03:34:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-31 03:34:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2806 transitions. [2023-08-31 03:34:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300383141762452 [2023-08-31 03:34:02,143 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2806 transitions. [2023-08-31 03:34:02,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2806 transitions. [2023-08-31 03:34:02,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:02,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2806 transitions. [2023-08-31 03:34:02,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.355555555555554) internal successors, (2806), 45 states have internal predecessors, (2806), 0 states have call successors, (0), 0 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 03:34:02,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 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 03:34:02,151 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 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 03:34:02,151 INFO L175 Difference]: Start difference. First operand has 282 places, 270 transitions, 3999 flow. Second operand 45 states and 2806 transitions. [2023-08-31 03:34:02,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 485 transitions, 8434 flow [2023-08-31 03:34:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 485 transitions, 7272 flow, removed 500 selfloop flow, removed 34 redundant places. [2023-08-31 03:34:02,483 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5741 flow [2023-08-31 03:34:02,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5741, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2023-08-31 03:34:02,483 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2023-08-31 03:34:02,484 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5741 flow [2023-08-31 03:34:02,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.82608695652174) internal successors, (1376), 23 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 03:34:02,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:02,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:02,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:02,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 03:34:02,685 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:02,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1236654659, now seen corresponding path program 22 times [2023-08-31 03:34:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:02,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221475887] [2023-08-31 03:34:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221475887] [2023-08-31 03:34:02,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221475887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:02,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303195135] [2023-08-31 03:34:02,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:34:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:02,873 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:02,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:34:02,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:34:02,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:34:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:03,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:03,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303195135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:03,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:03,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:34:03,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387162151] [2023-08-31 03:34:03,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:03,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:34:03,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:34:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:34:03,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:03,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5741 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 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 03:34:03,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:03,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:03,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:05,033 INFO L130 PetriNetUnfolder]: 1239/2321 cut-off events. [2023-08-31 03:34:05,033 INFO L131 PetriNetUnfolder]: For 105658/105658 co-relation queries the response was YES. [2023-08-31 03:34:05,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 2321 events. 1239/2321 cut-off events. For 105658/105658 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14077 event pairs, 63 based on Foata normal form. 11/2328 useless extension candidates. Maximal degree in co-relation 22455. Up to 1049 conditions per place. [2023-08-31 03:34:05,050 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 309 selfloop transitions, 180 changer transitions 33/522 dead transitions. [2023-08-31 03:34:05,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 522 transitions, 9259 flow [2023-08-31 03:34:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 03:34:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 03:34:05,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2627 transitions. [2023-08-31 03:34:05,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43136288998357963 [2023-08-31 03:34:05,052 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2627 transitions. [2023-08-31 03:34:05,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2627 transitions. [2023-08-31 03:34:05,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:05,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2627 transitions. [2023-08-31 03:34:05,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 62.54761904761905) internal successors, (2627), 42 states have internal predecessors, (2627), 0 states have call successors, (0), 0 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 03:34:05,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 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 03:34:05,060 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 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 03:34:05,060 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5741 flow. Second operand 42 states and 2627 transitions. [2023-08-31 03:34:05,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 522 transitions, 9259 flow [2023-08-31 03:34:05,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 522 transitions, 7914 flow, removed 626 selfloop flow, removed 25 redundant places. [2023-08-31 03:34:05,319 INFO L231 Difference]: Finished difference. Result has 312 places, 363 transitions, 5781 flow [2023-08-31 03:34:05,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5781, PETRI_PLACES=312, PETRI_TRANSITIONS=363} [2023-08-31 03:34:05,320 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-08-31 03:34:05,320 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 363 transitions, 5781 flow [2023-08-31 03:34:05,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 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 03:34:05,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:05,320 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:05,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:05,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:05,521 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:05,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1224381777, now seen corresponding path program 23 times [2023-08-31 03:34:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:05,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794571147] [2023-08-31 03:34:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:05,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:05,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:05,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794571147] [2023-08-31 03:34:05,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794571147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:05,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767418702] [2023-08-31 03:34:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:34:05,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:05,709 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:05,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:34:05,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:34:05,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:05,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 03:34:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:05,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767418702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:06,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:06,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:34:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552511169] [2023-08-31 03:34:06,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:06,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:34:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:34:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:34:06,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:06,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 363 transitions, 5781 flow. Second operand has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 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 03:34:06,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:06,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:06,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:08,527 INFO L130 PetriNetUnfolder]: 1665/3168 cut-off events. [2023-08-31 03:34:08,527 INFO L131 PetriNetUnfolder]: For 159603/159603 co-relation queries the response was YES. [2023-08-31 03:34:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3168 events. 1665/3168 cut-off events. For 159603/159603 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21180 event pairs, 57 based on Foata normal form. 26/3190 useless extension candidates. Maximal degree in co-relation 31709. Up to 1694 conditions per place. [2023-08-31 03:34:08,554 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 409 selfloop transitions, 190 changer transitions 74/673 dead transitions. [2023-08-31 03:34:08,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 673 transitions, 11632 flow [2023-08-31 03:34:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-31 03:34:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-31 03:34:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3464 transitions. [2023-08-31 03:34:08,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343573667711599 [2023-08-31 03:34:08,557 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3464 transitions. [2023-08-31 03:34:08,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3464 transitions. [2023-08-31 03:34:08,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:08,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3464 transitions. [2023-08-31 03:34:08,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 62.981818181818184) internal successors, (3464), 55 states have internal predecessors, (3464), 0 states have call successors, (0), 0 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 03:34:08,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 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 03:34:08,567 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 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 03:34:08,567 INFO L175 Difference]: Start difference. First operand has 312 places, 363 transitions, 5781 flow. Second operand 55 states and 3464 transitions. [2023-08-31 03:34:08,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 673 transitions, 11632 flow [2023-08-31 03:34:09,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 673 transitions, 11103 flow, removed 156 selfloop flow, removed 30 redundant places. [2023-08-31 03:34:09,025 INFO L231 Difference]: Finished difference. Result has 340 places, 484 transitions, 8710 flow [2023-08-31 03:34:09,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8710, PETRI_PLACES=340, PETRI_TRANSITIONS=484} [2023-08-31 03:34:09,025 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-08-31 03:34:09,025 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 484 transitions, 8710 flow [2023-08-31 03:34:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.6) internal successors, (1490), 25 states have internal predecessors, (1490), 0 states have call successors, (0), 0 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 03:34:09,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:09,026 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:09,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:09,226 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:09,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1590475332, now seen corresponding path program 24 times [2023-08-31 03:34:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324892755] [2023-08-31 03:34:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:09,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324892755] [2023-08-31 03:34:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324892755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595057711] [2023-08-31 03:34:09,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:34:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:09,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:09,461 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:09,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 03:34:09,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:34:09,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 03:34:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:09,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595057711] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:10,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:10,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 03:34:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424650837] [2023-08-31 03:34:10,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:34:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:34:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:34:10,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:10,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 484 transitions, 8710 flow. Second operand has 28 states, 28 states have (on average 59.57142857142857) internal successors, (1668), 28 states have internal predecessors, (1668), 0 states have call successors, (0), 0 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 03:34:10,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:10,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:10,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:13,132 INFO L130 PetriNetUnfolder]: 2973/5695 cut-off events. [2023-08-31 03:34:13,132 INFO L131 PetriNetUnfolder]: For 363228/363228 co-relation queries the response was YES. [2023-08-31 03:34:13,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65947 conditions, 5695 events. 2973/5695 cut-off events. For 363228/363228 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43216 event pairs, 99 based on Foata normal form. 39/5730 useless extension candidates. Maximal degree in co-relation 65835. Up to 1775 conditions per place. [2023-08-31 03:34:13,188 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 476 selfloop transitions, 439 changer transitions 90/1005 dead transitions. [2023-08-31 03:34:13,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1005 transitions, 20173 flow [2023-08-31 03:34:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-31 03:34:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-31 03:34:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3353 transitions. [2023-08-31 03:34:13,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363044892648016 [2023-08-31 03:34:13,190 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3353 transitions. [2023-08-31 03:34:13,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3353 transitions. [2023-08-31 03:34:13,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:13,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3353 transitions. [2023-08-31 03:34:13,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 63.264150943396224) internal successors, (3353), 53 states have internal predecessors, (3353), 0 states have call successors, (0), 0 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 03:34:13,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:13,201 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:13,201 INFO L175 Difference]: Start difference. First operand has 340 places, 484 transitions, 8710 flow. Second operand 53 states and 3353 transitions. [2023-08-31 03:34:13,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1005 transitions, 20173 flow [2023-08-31 03:34:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1005 transitions, 17491 flow, removed 1243 selfloop flow, removed 31 redundant places. [2023-08-31 03:34:14,167 INFO L231 Difference]: Finished difference. Result has 371 places, 750 transitions, 13577 flow [2023-08-31 03:34:14,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13577, PETRI_PLACES=371, PETRI_TRANSITIONS=750} [2023-08-31 03:34:14,168 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2023-08-31 03:34:14,168 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 750 transitions, 13577 flow [2023-08-31 03:34:14,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.57142857142857) internal successors, (1668), 28 states have internal predecessors, (1668), 0 states have call successors, (0), 0 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 03:34:14,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:14,169 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:14,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:14,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 03:34:14,374 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:14,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1528243986, now seen corresponding path program 25 times [2023-08-31 03:34:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:14,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022613958] [2023-08-31 03:34:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:14,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022613958] [2023-08-31 03:34:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022613958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022068684] [2023-08-31 03:34:14,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:34:14,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:14,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:14,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:14,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 03:34:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:14,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 03:34:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:14,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022068684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:15,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:15,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-31 03:34:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47782727] [2023-08-31 03:34:15,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:34:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:34:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:34:15,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:15,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 750 transitions, 13577 flow. Second operand has 28 states, 28 states have (on average 59.642857142857146) internal successors, (1670), 28 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 03:34:15,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:15,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:18,513 INFO L130 PetriNetUnfolder]: 3346/6465 cut-off events. [2023-08-31 03:34:18,514 INFO L131 PetriNetUnfolder]: For 341006/341006 co-relation queries the response was YES. [2023-08-31 03:34:18,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73310 conditions, 6465 events. 3346/6465 cut-off events. For 341006/341006 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50467 event pairs, 173 based on Foata normal form. 45/6506 useless extension candidates. Maximal degree in co-relation 73189. Up to 3403 conditions per place. [2023-08-31 03:34:18,573 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 567 selfloop transitions, 284 changer transitions 183/1034 dead transitions. [2023-08-31 03:34:18,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1034 transitions, 21725 flow [2023-08-31 03:34:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-31 03:34:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-31 03:34:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2804 transitions. [2023-08-31 03:34:18,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42973180076628353 [2023-08-31 03:34:18,577 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2804 transitions. [2023-08-31 03:34:18,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2804 transitions. [2023-08-31 03:34:18,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:18,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2804 transitions. [2023-08-31 03:34:18,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.31111111111111) internal successors, (2804), 45 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 03:34:18,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 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 03:34:18,585 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 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 03:34:18,586 INFO L175 Difference]: Start difference. First operand has 371 places, 750 transitions, 13577 flow. Second operand 45 states and 2804 transitions. [2023-08-31 03:34:18,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1034 transitions, 21725 flow [2023-08-31 03:34:20,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1034 transitions, 19051 flow, removed 1271 selfloop flow, removed 29 redundant places. [2023-08-31 03:34:20,089 INFO L231 Difference]: Finished difference. Result has 399 places, 763 transitions, 13433 flow [2023-08-31 03:34:20,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13433, PETRI_PLACES=399, PETRI_TRANSITIONS=763} [2023-08-31 03:34:20,090 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-31 03:34:20,090 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 763 transitions, 13433 flow [2023-08-31 03:34:20,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 59.642857142857146) internal successors, (1670), 28 states have internal predecessors, (1670), 0 states have call successors, (0), 0 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 03:34:20,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:20,091 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:20,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 03:34:20,291 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:20,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash 834360269, now seen corresponding path program 26 times [2023-08-31 03:34:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008310427] [2023-08-31 03:34:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008310427] [2023-08-31 03:34:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008310427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344111262] [2023-08-31 03:34:20,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:34:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:20,511 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:20,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 03:34:20,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:34:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:34:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:20,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:21,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344111262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:21,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:21,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-31 03:34:21,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306514644] [2023-08-31 03:34:21,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:21,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 03:34:21,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 03:34:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-08-31 03:34:21,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:21,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 763 transitions, 13433 flow. Second operand has 30 states, 30 states have (on average 59.56666666666667) internal successors, (1787), 30 states have internal predecessors, (1787), 0 states have call successors, (0), 0 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 03:34:21,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:21,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:21,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:23,786 INFO L130 PetriNetUnfolder]: 2635/5302 cut-off events. [2023-08-31 03:34:23,786 INFO L131 PetriNetUnfolder]: For 177078/177078 co-relation queries the response was YES. [2023-08-31 03:34:23,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 5302 events. 2635/5302 cut-off events. For 177078/177078 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41478 event pairs, 81 based on Foata normal form. 30/5328 useless extension candidates. Maximal degree in co-relation 50059. Up to 1415 conditions per place. [2023-08-31 03:34:23,846 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 416 selfloop transitions, 422 changer transitions 155/993 dead transitions. [2023-08-31 03:34:23,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 993 transitions, 19676 flow [2023-08-31 03:34:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-31 03:34:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-31 03:34:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2812 transitions. [2023-08-31 03:34:23,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43095785440613027 [2023-08-31 03:34:23,849 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2812 transitions. [2023-08-31 03:34:23,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2812 transitions. [2023-08-31 03:34:23,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:23,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2812 transitions. [2023-08-31 03:34:23,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 62.48888888888889) internal successors, (2812), 45 states have internal predecessors, (2812), 0 states have call successors, (0), 0 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 03:34:23,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 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 03:34:23,856 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 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 03:34:23,856 INFO L175 Difference]: Start difference. First operand has 399 places, 763 transitions, 13433 flow. Second operand 45 states and 2812 transitions. [2023-08-31 03:34:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 993 transitions, 19676 flow [2023-08-31 03:34:24,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 993 transitions, 18505 flow, removed 499 selfloop flow, removed 39 redundant places. [2023-08-31 03:34:24,956 INFO L231 Difference]: Finished difference. Result has 402 places, 749 transitions, 14038 flow [2023-08-31 03:34:24,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12630, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14038, PETRI_PLACES=402, PETRI_TRANSITIONS=749} [2023-08-31 03:34:24,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-08-31 03:34:24,958 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 749 transitions, 14038 flow [2023-08-31 03:34:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.56666666666667) internal successors, (1787), 30 states have internal predecessors, (1787), 0 states have call successors, (0), 0 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 03:34:24,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:24,958 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:24,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 03:34:25,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 03:34:25,162 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:25,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash -25703553, now seen corresponding path program 27 times [2023-08-31 03:34:25,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:25,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333743603] [2023-08-31 03:34:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:25,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:25,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333743603] [2023-08-31 03:34:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333743603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784336128] [2023-08-31 03:34:25,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:34:25,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:25,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:25,400 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:25,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 03:34:25,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 03:34:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:34:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:25,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:26,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784336128] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:26,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:26,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-31 03:34:26,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772772685] [2023-08-31 03:34:26,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:26,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:34:26,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:34:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-08-31 03:34:26,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:26,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 749 transitions, 14038 flow. Second operand has 31 states, 31 states have (on average 59.516129032258064) internal successors, (1845), 31 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 03:34:26,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:26,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:26,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:28,777 INFO L130 PetriNetUnfolder]: 2416/4845 cut-off events. [2023-08-31 03:34:28,777 INFO L131 PetriNetUnfolder]: For 160642/160642 co-relation queries the response was YES. [2023-08-31 03:34:28,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45963 conditions, 4845 events. 2416/4845 cut-off events. For 160642/160642 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37225 event pairs, 83 based on Foata normal form. 28/4869 useless extension candidates. Maximal degree in co-relation 45835. Up to 1415 conditions per place. [2023-08-31 03:34:28,822 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 397 selfloop transitions, 429 changer transitions 52/878 dead transitions. [2023-08-31 03:34:28,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 878 transitions, 16975 flow [2023-08-31 03:34:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 03:34:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 03:34:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2745 transitions. [2023-08-31 03:34:28,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43025078369905956 [2023-08-31 03:34:28,824 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2745 transitions. [2023-08-31 03:34:28,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2745 transitions. [2023-08-31 03:34:28,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:28,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2745 transitions. [2023-08-31 03:34:28,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 62.38636363636363) internal successors, (2745), 44 states have internal predecessors, (2745), 0 states have call successors, (0), 0 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 03:34:28,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 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 03:34:28,830 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 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 03:34:28,830 INFO L175 Difference]: Start difference. First operand has 402 places, 749 transitions, 14038 flow. Second operand 44 states and 2745 transitions. [2023-08-31 03:34:28,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 878 transitions, 16975 flow [2023-08-31 03:34:29,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 878 transitions, 15765 flow, removed 492 selfloop flow, removed 38 redundant places. [2023-08-31 03:34:29,848 INFO L231 Difference]: Finished difference. Result has 399 places, 743 transitions, 13814 flow [2023-08-31 03:34:29,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12973, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13814, PETRI_PLACES=399, PETRI_TRANSITIONS=743} [2023-08-31 03:34:29,849 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-31 03:34:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 743 transitions, 13814 flow [2023-08-31 03:34:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.516129032258064) internal successors, (1845), 31 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 03:34:29,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:29,849 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:29,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-31 03:34:30,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 03:34:30,053 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:30,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash 125395759, now seen corresponding path program 28 times [2023-08-31 03:34:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:30,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988854048] [2023-08-31 03:34:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:30,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988854048] [2023-08-31 03:34:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988854048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018514177] [2023-08-31 03:34:30,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:34:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:30,254 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:30,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 03:34:30,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:34:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:30,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:34:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:30,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:30,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018514177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:30,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:30,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-31 03:34:30,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116380671] [2023-08-31 03:34:30,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:34:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:34:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-08-31 03:34:31,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:31,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 743 transitions, 13814 flow. Second operand has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 03:34:31,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:31,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:31,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:34,261 INFO L130 PetriNetUnfolder]: 3625/6950 cut-off events. [2023-08-31 03:34:34,262 INFO L131 PetriNetUnfolder]: For 199928/199928 co-relation queries the response was YES. [2023-08-31 03:34:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67025 conditions, 6950 events. 3625/6950 cut-off events. For 199928/199928 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 53940 event pairs, 171 based on Foata normal form. 50/6996 useless extension candidates. Maximal degree in co-relation 66903. Up to 1805 conditions per place. [2023-08-31 03:34:34,324 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 364 selfloop transitions, 558 changer transitions 384/1306 dead transitions. [2023-08-31 03:34:34,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1306 transitions, 28646 flow [2023-08-31 03:34:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 03:34:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 03:34:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3240 transitions. [2023-08-31 03:34:34,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297082228116711 [2023-08-31 03:34:34,328 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3240 transitions. [2023-08-31 03:34:34,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3240 transitions. [2023-08-31 03:34:34,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:34,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3240 transitions. [2023-08-31 03:34:34,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 62.30769230769231) internal successors, (3240), 52 states have internal predecessors, (3240), 0 states have call successors, (0), 0 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 03:34:34,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 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 03:34:34,336 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 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 03:34:34,337 INFO L175 Difference]: Start difference. First operand has 399 places, 743 transitions, 13814 flow. Second operand 52 states and 3240 transitions. [2023-08-31 03:34:34,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1306 transitions, 28646 flow [2023-08-31 03:34:35,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1306 transitions, 26993 flow, removed 165 selfloop flow, removed 39 redundant places. [2023-08-31 03:34:35,439 INFO L231 Difference]: Finished difference. Result has 414 places, 812 transitions, 16633 flow [2023-08-31 03:34:35,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12766, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=16633, PETRI_PLACES=414, PETRI_TRANSITIONS=812} [2023-08-31 03:34:35,440 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-08-31 03:34:35,440 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 812 transitions, 16633 flow [2023-08-31 03:34:35,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 03:34:35,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:35,440 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:35,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:35,646 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:35,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1213169703, now seen corresponding path program 29 times [2023-08-31 03:34:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:35,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104704005] [2023-08-31 03:34:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:35,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:35,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104704005] [2023-08-31 03:34:35,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104704005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:35,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524756491] [2023-08-31 03:34:35,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:34:35,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:35,864 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:35,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 03:34:35,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:34:35,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 03:34:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:36,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524756491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:36,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:36,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-31 03:34:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627538874] [2023-08-31 03:34:36,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 03:34:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 03:34:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-08-31 03:34:36,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:36,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 812 transitions, 16633 flow. Second operand has 30 states, 30 states have (on average 59.53333333333333) internal successors, (1786), 30 states have internal predecessors, (1786), 0 states have call successors, (0), 0 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 03:34:36,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:36,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:36,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:39,704 INFO L130 PetriNetUnfolder]: 2999/5935 cut-off events. [2023-08-31 03:34:39,704 INFO L131 PetriNetUnfolder]: For 160320/160320 co-relation queries the response was YES. [2023-08-31 03:34:39,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56225 conditions, 5935 events. 2999/5935 cut-off events. For 160320/160320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45872 event pairs, 151 based on Foata normal form. 29/5960 useless extension candidates. Maximal degree in co-relation 56103. Up to 3402 conditions per place. [2023-08-31 03:34:39,758 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 719 selfloop transitions, 234 changer transitions 149/1102 dead transitions. [2023-08-31 03:34:39,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1102 transitions, 22714 flow [2023-08-31 03:34:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-31 03:34:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-31 03:34:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2868 transitions. [2023-08-31 03:34:39,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42998500749625185 [2023-08-31 03:34:39,761 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2868 transitions. [2023-08-31 03:34:39,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2868 transitions. [2023-08-31 03:34:39,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:39,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2868 transitions. [2023-08-31 03:34:39,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 62.34782608695652) internal successors, (2868), 46 states have internal predecessors, (2868), 0 states have call successors, (0), 0 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 03:34:39,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 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 03:34:39,768 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 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 03:34:39,768 INFO L175 Difference]: Start difference. First operand has 414 places, 812 transitions, 16633 flow. Second operand 46 states and 2868 transitions. [2023-08-31 03:34:39,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1102 transitions, 22714 flow [2023-08-31 03:34:41,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1102 transitions, 20479 flow, removed 858 selfloop flow, removed 47 redundant places. [2023-08-31 03:34:41,024 INFO L231 Difference]: Finished difference. Result has 403 places, 873 transitions, 16702 flow [2023-08-31 03:34:41,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=14940, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16702, PETRI_PLACES=403, PETRI_TRANSITIONS=873} [2023-08-31 03:34:41,026 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-08-31 03:34:41,026 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 873 transitions, 16702 flow [2023-08-31 03:34:41,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.53333333333333) internal successors, (1786), 30 states have internal predecessors, (1786), 0 states have call successors, (0), 0 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 03:34:41,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:41,026 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:41,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:41,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:41,233 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:41,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash -808262398, now seen corresponding path program 30 times [2023-08-31 03:34:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:41,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441273411] [2023-08-31 03:34:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441273411] [2023-08-31 03:34:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441273411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483501314] [2023-08-31 03:34:41,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:34:41,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:41,480 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:41,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 03:34:41,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 03:34:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 03:34:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:41,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:42,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483501314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:42,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:42,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2023-08-31 03:34:42,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004600479] [2023-08-31 03:34:42,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:42,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:34:42,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:34:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-08-31 03:34:42,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:42,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 873 transitions, 16702 flow. Second operand has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 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 03:34:42,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:42,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:42,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:45,139 INFO L130 PetriNetUnfolder]: 2565/5240 cut-off events. [2023-08-31 03:34:45,140 INFO L131 PetriNetUnfolder]: For 111733/111733 co-relation queries the response was YES. [2023-08-31 03:34:45,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46269 conditions, 5240 events. 2565/5240 cut-off events. For 111733/111733 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40939 event pairs, 77 based on Foata normal form. 64/5300 useless extension candidates. Maximal degree in co-relation 46155. Up to 1509 conditions per place. [2023-08-31 03:34:45,195 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 457 selfloop transitions, 512 changer transitions 72/1041 dead transitions. [2023-08-31 03:34:45,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1041 transitions, 21050 flow [2023-08-31 03:34:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 03:34:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 03:34:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3034 transitions. [2023-08-31 03:34:45,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42702322308233637 [2023-08-31 03:34:45,198 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3034 transitions. [2023-08-31 03:34:45,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3034 transitions. [2023-08-31 03:34:45,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:45,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3034 transitions. [2023-08-31 03:34:45,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 61.91836734693877) internal successors, (3034), 49 states have internal predecessors, (3034), 0 states have call successors, (0), 0 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 03:34:45,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 03:34:45,207 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 03:34:45,207 INFO L175 Difference]: Start difference. First operand has 403 places, 873 transitions, 16702 flow. Second operand 49 states and 3034 transitions. [2023-08-31 03:34:45,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1041 transitions, 21050 flow [2023-08-31 03:34:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1041 transitions, 20410 flow, removed 268 selfloop flow, removed 32 redundant places. [2023-08-31 03:34:46,087 INFO L231 Difference]: Finished difference. Result has 412 places, 891 transitions, 18343 flow [2023-08-31 03:34:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=16130, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18343, PETRI_PLACES=412, PETRI_TRANSITIONS=891} [2023-08-31 03:34:46,088 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-08-31 03:34:46,088 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 891 transitions, 18343 flow [2023-08-31 03:34:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 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 03:34:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:46,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-31 03:34:46,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 03:34:46,290 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:46,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1662152656, now seen corresponding path program 31 times [2023-08-31 03:34:46,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:46,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891699516] [2023-08-31 03:34:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:46,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:46,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891699516] [2023-08-31 03:34:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891699516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170312704] [2023-08-31 03:34:46,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:34:46,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:46,539 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:46,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 03:34:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 03:34:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:46,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170312704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:47,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2023-08-31 03:34:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245566780] [2023-08-31 03:34:47,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 03:34:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 03:34:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2023-08-31 03:34:47,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:47,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 891 transitions, 18343 flow. Second operand has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 03:34:47,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:47,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:47,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:49,917 INFO L130 PetriNetUnfolder]: 2335/4642 cut-off events. [2023-08-31 03:34:49,918 INFO L131 PetriNetUnfolder]: For 85783/85783 co-relation queries the response was YES. [2023-08-31 03:34:49,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41724 conditions, 4642 events. 2335/4642 cut-off events. For 85783/85783 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34274 event pairs, 3 based on Foata normal form. 30/4668 useless extension candidates. Maximal degree in co-relation 41612. Up to 2668 conditions per place. [2023-08-31 03:34:49,962 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 752 selfloop transitions, 259 changer transitions 50/1061 dead transitions. [2023-08-31 03:34:49,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1061 transitions, 22180 flow [2023-08-31 03:34:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 03:34:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 03:34:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2376 transitions. [2023-08-31 03:34:49,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43121597096188746 [2023-08-31 03:34:49,964 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2376 transitions. [2023-08-31 03:34:49,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2376 transitions. [2023-08-31 03:34:49,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:49,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2376 transitions. [2023-08-31 03:34:49,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 62.526315789473685) internal successors, (2376), 38 states have internal predecessors, (2376), 0 states have call successors, (0), 0 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 03:34:49,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 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 03:34:49,970 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 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 03:34:49,970 INFO L175 Difference]: Start difference. First operand has 412 places, 891 transitions, 18343 flow. Second operand 38 states and 2376 transitions. [2023-08-31 03:34:49,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1061 transitions, 22180 flow [2023-08-31 03:34:50,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1061 transitions, 21212 flow, removed 235 selfloop flow, removed 43 redundant places. [2023-08-31 03:34:50,660 INFO L231 Difference]: Finished difference. Result has 413 places, 941 transitions, 19037 flow [2023-08-31 03:34:50,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=17393, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19037, PETRI_PLACES=413, PETRI_TRANSITIONS=941} [2023-08-31 03:34:50,660 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-08-31 03:34:50,661 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 941 transitions, 19037 flow [2023-08-31 03:34:50,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.58064516129032) internal successors, (1847), 31 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 03:34:50,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:50,661 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:50,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:50,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:50,862 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:50,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash 543377190, now seen corresponding path program 32 times [2023-08-31 03:34:50,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:50,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401729357] [2023-08-31 03:34:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:50,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401729357] [2023-08-31 03:34:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401729357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027810986] [2023-08-31 03:34:51,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:34:51,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:51,132 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:51,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 03:34:51,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:34:51,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:51,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:34:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:51,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:51,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027810986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:51,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:51,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-08-31 03:34:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688255482] [2023-08-31 03:34:51,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:51,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 03:34:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 03:34:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-08-31 03:34:51,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:51,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 941 transitions, 19037 flow. Second operand has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 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 03:34:51,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:51,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:51,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:55,586 INFO L130 PetriNetUnfolder]: 3109/6832 cut-off events. [2023-08-31 03:34:55,586 INFO L131 PetriNetUnfolder]: For 113362/113362 co-relation queries the response was YES. [2023-08-31 03:34:55,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55455 conditions, 6832 events. 3109/6832 cut-off events. For 113362/113362 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59404 event pairs, 7 based on Foata normal form. 84/6912 useless extension candidates. Maximal degree in co-relation 55335. Up to 2818 conditions per place. [2023-08-31 03:34:55,663 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 931 selfloop transitions, 302 changer transitions 474/1707 dead transitions. [2023-08-31 03:34:55,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1707 transitions, 32940 flow [2023-08-31 03:34:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-31 03:34:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-31 03:34:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4078 transitions. [2023-08-31 03:34:55,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326790450928382 [2023-08-31 03:34:55,667 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4078 transitions. [2023-08-31 03:34:55,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4078 transitions. [2023-08-31 03:34:55,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:55,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4078 transitions. [2023-08-31 03:34:55,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 62.738461538461536) internal successors, (4078), 65 states have internal predecessors, (4078), 0 states have call successors, (0), 0 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 03:34:55,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 03:34:55,674 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 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 03:34:55,674 INFO L175 Difference]: Start difference. First operand has 413 places, 941 transitions, 19037 flow. Second operand 65 states and 4078 transitions. [2023-08-31 03:34:55,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1707 transitions, 32940 flow [2023-08-31 03:34:56,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1707 transitions, 32635 flow, removed 83 selfloop flow, removed 23 redundant places. [2023-08-31 03:34:56,547 INFO L231 Difference]: Finished difference. Result has 477 places, 1043 transitions, 21861 flow [2023-08-31 03:34:56,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18882, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=21861, PETRI_PLACES=477, PETRI_TRANSITIONS=1043} [2023-08-31 03:34:56,547 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 457 predicate places. [2023-08-31 03:34:56,548 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1043 transitions, 21861 flow [2023-08-31 03:34:56,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 59.53125) internal successors, (1905), 32 states have internal predecessors, (1905), 0 states have call successors, (0), 0 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 03:34:56,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:56,548 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:56,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-31 03:34:56,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:56,749 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:56,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1301031468, now seen corresponding path program 33 times [2023-08-31 03:34:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:56,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413220112] [2023-08-31 03:34:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:56,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:56,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413220112] [2023-08-31 03:34:56,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413220112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231651002] [2023-08-31 03:34:56,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:34:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:56,994 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:56,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 03:34:57,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-31 03:34:57,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:57,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 03:34:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:57,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231651002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:57,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:57,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-31 03:34:57,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829385472] [2023-08-31 03:34:57,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:57,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 03:34:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 03:34:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 03:34:57,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:34:57,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1043 transitions, 21861 flow. Second operand has 33 states, 33 states have (on average 59.484848484848484) internal successors, (1963), 33 states have internal predecessors, (1963), 0 states have call successors, (0), 0 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 03:34:57,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:57,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:34:57,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:01,300 INFO L130 PetriNetUnfolder]: 3094/6954 cut-off events. [2023-08-31 03:35:01,301 INFO L131 PetriNetUnfolder]: For 162610/162610 co-relation queries the response was YES. [2023-08-31 03:35:01,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61972 conditions, 6954 events. 3094/6954 cut-off events. For 162610/162610 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 61590 event pairs, 3 based on Foata normal form. 137/7087 useless extension candidates. Maximal degree in co-relation 61831. Up to 2668 conditions per place. [2023-08-31 03:35:01,375 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 724 selfloop transitions, 492 changer transitions 144/1360 dead transitions. [2023-08-31 03:35:01,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1360 transitions, 30216 flow [2023-08-31 03:35:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:35:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:35:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2191 transitions. [2023-08-31 03:35:01,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317241379310345 [2023-08-31 03:35:01,377 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2191 transitions. [2023-08-31 03:35:01,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2191 transitions. [2023-08-31 03:35:01,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:01,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2191 transitions. [2023-08-31 03:35:01,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 62.6) internal successors, (2191), 35 states have internal predecessors, (2191), 0 states have call successors, (0), 0 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 03:35:01,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 03:35:01,381 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 03:35:01,381 INFO L175 Difference]: Start difference. First operand has 477 places, 1043 transitions, 21861 flow. Second operand 35 states and 2191 transitions. [2023-08-31 03:35:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1360 transitions, 30216 flow [2023-08-31 03:35:03,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1360 transitions, 26633 flow, removed 1403 selfloop flow, removed 48 redundant places. [2023-08-31 03:35:03,166 INFO L231 Difference]: Finished difference. Result has 445 places, 1163 transitions, 23234 flow [2023-08-31 03:35:03,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19952, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23234, PETRI_PLACES=445, PETRI_TRANSITIONS=1163} [2023-08-31 03:35:03,167 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 425 predicate places. [2023-08-31 03:35:03,167 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1163 transitions, 23234 flow [2023-08-31 03:35:03,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.484848484848484) internal successors, (1963), 33 states have internal predecessors, (1963), 0 states have call successors, (0), 0 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 03:35:03,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:03,167 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:03,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:03,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-31 03:35:03,368 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:03,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:03,368 INFO L85 PathProgramCache]: Analyzing trace with hash -34981713, now seen corresponding path program 34 times [2023-08-31 03:35:03,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:03,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829809992] [2023-08-31 03:35:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:03,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:35:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829809992] [2023-08-31 03:35:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829809992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:03,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783152830] [2023-08-31 03:35:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:35:03,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:03,592 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:03,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 03:35:03,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:35:03,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:35:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:03,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783152830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:04,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:04,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2023-08-31 03:35:04,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671366801] [2023-08-31 03:35:04,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 03:35:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 03:35:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-08-31 03:35:04,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:35:04,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1163 transitions, 23234 flow. Second operand has 33 states, 33 states have (on average 59.57575757575758) internal successors, (1966), 33 states have internal predecessors, (1966), 0 states have call successors, (0), 0 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 03:35:04,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:04,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:35:04,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:06,700 INFO L130 PetriNetUnfolder]: 2730/5071 cut-off events. [2023-08-31 03:35:06,700 INFO L131 PetriNetUnfolder]: For 64336/64336 co-relation queries the response was YES. [2023-08-31 03:35:06,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45809 conditions, 5071 events. 2730/5071 cut-off events. For 64336/64336 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34760 event pairs, 3 based on Foata normal form. 12/5079 useless extension candidates. Maximal degree in co-relation 45687. Up to 2030 conditions per place. [2023-08-31 03:35:06,756 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 662 selfloop transitions, 572 changer transitions 83/1317 dead transitions. [2023-08-31 03:35:06,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1317 transitions, 27831 flow [2023-08-31 03:35:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 03:35:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 03:35:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2434 transitions. [2023-08-31 03:35:06,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304155614500442 [2023-08-31 03:35:06,758 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2434 transitions. [2023-08-31 03:35:06,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2434 transitions. [2023-08-31 03:35:06,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:06,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2434 transitions. [2023-08-31 03:35:06,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.41025641025641) internal successors, (2434), 39 states have internal predecessors, (2434), 0 states have call successors, (0), 0 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 03:35:06,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 03:35:06,763 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 03:35:06,763 INFO L175 Difference]: Start difference. First operand has 445 places, 1163 transitions, 23234 flow. Second operand 39 states and 2434 transitions. [2023-08-31 03:35:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1317 transitions, 27831 flow [2023-08-31 03:35:07,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1317 transitions, 26548 flow, removed 505 selfloop flow, removed 26 redundant places. [2023-08-31 03:35:07,463 INFO L231 Difference]: Finished difference. Result has 451 places, 1176 transitions, 24146 flow [2023-08-31 03:35:07,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24146, PETRI_PLACES=451, PETRI_TRANSITIONS=1176} [2023-08-31 03:35:07,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2023-08-31 03:35:07,464 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1176 transitions, 24146 flow [2023-08-31 03:35:07,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.57575757575758) internal successors, (1966), 33 states have internal predecessors, (1966), 0 states have call successors, (0), 0 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 03:35:07,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:07,464 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:07,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:07,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-31 03:35:07,665 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:07,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash -801870177, now seen corresponding path program 35 times [2023-08-31 03:35:07,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:07,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896657152] [2023-08-31 03:35:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:35:07,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:07,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896657152] [2023-08-31 03:35:07,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896657152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:07,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130227796] [2023-08-31 03:35:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:35:07,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:07,908 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:07,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 03:35:07,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-31 03:35:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:07,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 03:35:07,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:08,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130227796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:08,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:08,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-08-31 03:35:08,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547712589] [2023-08-31 03:35:08,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:08,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 03:35:08,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 03:35:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-08-31 03:35:08,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:35:08,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1176 transitions, 24146 flow. Second operand has 34 states, 34 states have (on average 59.529411764705884) internal successors, (2024), 34 states have internal predecessors, (2024), 0 states have call successors, (0), 0 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 03:35:08,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:08,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:35:08,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:11,274 INFO L130 PetriNetUnfolder]: 2657/4893 cut-off events. [2023-08-31 03:35:11,274 INFO L131 PetriNetUnfolder]: For 58703/58703 co-relation queries the response was YES. [2023-08-31 03:35:11,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44050 conditions, 4893 events. 2657/4893 cut-off events. For 58703/58703 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33134 event pairs, 3 based on Foata normal form. 9/4898 useless extension candidates. Maximal degree in co-relation 43931. Up to 2030 conditions per place. [2023-08-31 03:35:11,311 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 523 selfloop transitions, 36 changer transitions 717/1276 dead transitions. [2023-08-31 03:35:11,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1276 transitions, 27396 flow [2023-08-31 03:35:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 03:35:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 03:35:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2546 transitions. [2023-08-31 03:35:11,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42825904121110175 [2023-08-31 03:35:11,313 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2546 transitions. [2023-08-31 03:35:11,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2546 transitions. [2023-08-31 03:35:11,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:11,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2546 transitions. [2023-08-31 03:35:11,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 62.09756097560975) internal successors, (2546), 41 states have internal predecessors, (2546), 0 states have call successors, (0), 0 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 03:35:11,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 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 03:35:11,317 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 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 03:35:11,317 INFO L175 Difference]: Start difference. First operand has 451 places, 1176 transitions, 24146 flow. Second operand 41 states and 2546 transitions. [2023-08-31 03:35:11,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1276 transitions, 27396 flow [2023-08-31 03:35:11,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1276 transitions, 26889 flow, removed 177 selfloop flow, removed 29 redundant places. [2023-08-31 03:35:11,913 INFO L231 Difference]: Finished difference. Result has 456 places, 548 transitions, 8216 flow [2023-08-31 03:35:11,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=23747, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8216, PETRI_PLACES=456, PETRI_TRANSITIONS=548} [2023-08-31 03:35:11,914 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2023-08-31 03:35:11,914 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 548 transitions, 8216 flow [2023-08-31 03:35:11,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 59.529411764705884) internal successors, (2024), 34 states have internal predecessors, (2024), 0 states have call successors, (0), 0 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 03:35:11,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:11,915 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:11,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 03:35:12,120 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:12,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1643464096, now seen corresponding path program 36 times [2023-08-31 03:35:12,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965569622] [2023-08-31 03:35:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:12,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965569622] [2023-08-31 03:35:12,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965569622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539430054] [2023-08-31 03:35:12,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:35:12,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:12,387 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:12,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 03:35:12,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-31 03:35:12,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 03:35:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:12,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:35:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539430054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:13,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:13,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-08-31 03:35:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066375178] [2023-08-31 03:35:13,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:13,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-31 03:35:13,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-31 03:35:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-08-31 03:35:13,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-31 03:35:13,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 548 transitions, 8216 flow. Second operand has 42 states, 42 states have (on average 59.42857142857143) internal successors, (2496), 42 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 03:35:13,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:13,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-31 03:35:13,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:15,120 INFO L130 PetriNetUnfolder]: 1693/3215 cut-off events. [2023-08-31 03:35:15,120 INFO L131 PetriNetUnfolder]: For 10432/10432 co-relation queries the response was YES. [2023-08-31 03:35:15,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21453 conditions, 3215 events. 1693/3215 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20402 event pairs, 0 based on Foata normal form. 17/3230 useless extension candidates. Maximal degree in co-relation 21339. Up to 985 conditions per place. [2023-08-31 03:35:15,144 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 0 selfloop transitions, 0 changer transitions 905/905 dead transitions. [2023-08-31 03:35:15,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 905 transitions, 14323 flow [2023-08-31 03:35:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-31 03:35:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-31 03:35:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3138 transitions. [2023-08-31 03:35:15,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243407707910751 [2023-08-31 03:35:15,146 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3138 transitions. [2023-08-31 03:35:15,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3138 transitions. [2023-08-31 03:35:15,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:15,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3138 transitions. [2023-08-31 03:35:15,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.529411764705884) internal successors, (3138), 51 states have internal predecessors, (3138), 0 states have call successors, (0), 0 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 03:35:15,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 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 03:35:15,152 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 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 03:35:15,152 INFO L175 Difference]: Start difference. First operand has 456 places, 548 transitions, 8216 flow. Second operand 51 states and 3138 transitions. [2023-08-31 03:35:15,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 905 transitions, 14323 flow [2023-08-31 03:35:15,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 905 transitions, 13429 flow, removed 258 selfloop flow, removed 42 redundant places. [2023-08-31 03:35:15,266 INFO L231 Difference]: Finished difference. Result has 276 places, 0 transitions, 0 flow [2023-08-31 03:35:15,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=276, PETRI_TRANSITIONS=0} [2023-08-31 03:35:15,266 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-08-31 03:35:15,266 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 0 transitions, 0 flow [2023-08-31 03:35:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 59.42857142857143) internal successors, (2496), 42 states have internal predecessors, (2496), 0 states have call successors, (0), 0 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 03:35:15,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-31 03:35:15,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-31 03:35:15,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-31 03:35:15,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-31 03:35:15,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:15,471 INFO L445 BasicCegarLoop]: Path program histogram: [36, 1, 1] [2023-08-31 03:35:15,473 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-31 03:35:15,473 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-31 03:35:15,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.08 03:35:15 BasicIcfg [2023-08-31 03:35:15,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-31 03:35:15,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-31 03:35:15,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-31 03:35:15,476 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-31 03:35:15,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:33:21" (3/4) ... [2023-08-31 03:35:15,479 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-31 03:35:15,484 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-31 03:35:15,484 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-31 03:35:15,487 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-31 03:35:15,488 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-31 03:35:15,488 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-31 03:35:15,488 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-31 03:35:15,520 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-31 03:35:15,520 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-31 03:35:15,521 INFO L158 Benchmark]: Toolchain (without parser) took 115116.60ms. Allocated memory was 67.1MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 36.0MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2023-08-31 03:35:15,521 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory is still 30.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-31 03:35:15,521 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.60ms. Allocated memory is still 67.1MB. Free memory was 35.9MB in the beginning and 40.8MB in the end (delta: -4.9MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2023-08-31 03:35:15,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.09ms. Allocated memory is still 67.1MB. Free memory was 40.8MB in the beginning and 39.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 03:35:15,522 INFO L158 Benchmark]: Boogie Preprocessor took 39.18ms. Allocated memory is still 67.1MB. Free memory was 39.2MB in the beginning and 37.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-31 03:35:15,522 INFO L158 Benchmark]: RCFGBuilder took 487.51ms. Allocated memory is still 67.1MB. Free memory was 37.9MB in the beginning and 43.0MB in the end (delta: -5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-31 03:35:15,523 INFO L158 Benchmark]: TraceAbstraction took 114266.36ms. Allocated memory was 67.1MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 42.4MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2023-08-31 03:35:15,523 INFO L158 Benchmark]: Witness Printer took 44.01ms. Allocated memory is still 3.5GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-31 03:35:15,524 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory is still 30.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.60ms. Allocated memory is still 67.1MB. Free memory was 35.9MB in the beginning and 40.8MB in the end (delta: -4.9MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.09ms. Allocated memory is still 67.1MB. Free memory was 40.8MB in the beginning and 39.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.18ms. Allocated memory is still 67.1MB. Free memory was 39.2MB in the beginning and 37.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 487.51ms. Allocated memory is still 67.1MB. Free memory was 37.9MB in the beginning and 43.0MB in the end (delta: -5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 114266.36ms. Allocated memory was 67.1MB in the beginning and 3.5GB in the end (delta: 3.4GB). Free memory was 42.4MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. * Witness Printer took 44.01ms. Allocated memory is still 3.5GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 3.2MB). 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: 2.1s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 449 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 448, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 218, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 448, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 218, unknown conditional: 0, unknown unconditional: 218] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: 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 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 114.1s, OverallIterations: 38, TraceHistogramMax: 8, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 79.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8844 SdHoareTripleChecker+Valid, 18.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8511 mSDsluCounter, 3473 SdHoareTripleChecker+Invalid, 15.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3300 mSDsCounter, 1605 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44673 IncrementalHoareTripleChecker+Invalid, 46278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1605 mSolverCounterUnsat, 173 mSDtfsCounter, 44673 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2465 GetRequests, 623 SyntacticMatches, 50 SemanticMatches, 1792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31147 ImplicationChecksByTransitivity, 30.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24146occurred in iteration=36, InterpolantAutomatonStates: 1275, 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, 1.0s SatisfiabilityAnalysisTime, 21.8s InterpolantComputationTime, 1267 NumberOfCodeBlocks, 1267 NumberOfCodeBlocksAsserted, 130 NumberOfCheckSat, 1777 ConstructedInterpolants, 0 QuantifiedInterpolants, 19557 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 931 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 47/922 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 03:35:15,551 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