./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp1x3.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 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:31:52,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:31:52,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:31:52,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:31:52,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:31:52,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:31:52,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:31:52,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:31:52,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:31:52,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:31:52,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:31:52,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:31:52,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:31:52,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:31:52,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:31:52,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:31:52,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:31:52,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:31:52,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:31:52,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:31:52,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:31:52,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:31:52,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:31:52,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:31:52,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:31:52,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:31:52,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:31:52,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:31:52,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:31:52,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:31:52,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:31:52,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:31:52,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:31:52,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:31:52,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:31:52,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:31:52,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:31:52,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:31:52,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:31:52,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:31:52,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:31:52,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:31:52,609 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:31:52,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:31:52,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:31:52,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:31:52,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:31:52,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:31:52,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:31:52,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:31:52,612 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:31:52,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:31:52,613 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:31:52,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:31:52,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:31:52,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:31:52,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:31:52,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:31:52,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:31:52,614 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:31:52,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:31:52,615 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:31:52,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:31:52,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:31:52,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:31:52,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:31:52,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:31:52,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:31:52,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:31:52,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:31:52,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:31:52,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:31:52,617 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:31:52,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:31:52,617 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:31:52,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:31:52,618 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:31:52,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:31:52,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:31:52,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:31:52,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:31:52,913 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:31:52,914 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:31:52,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2023-09-01 11:31:54,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:31:54,279 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:31:54,279 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp1x3.wvr.c [2023-09-01 11:31:54,287 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04065ebb/45d9cc6ff94e41dc9bc562564b9e14c0/FLAG1ee44ba48 [2023-09-01 11:31:54,306 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c04065ebb/45d9cc6ff94e41dc9bc562564b9e14c0 [2023-09-01 11:31:54,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:31:54,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:31:54,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:31:54,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:31:54,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:31:54,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617dcf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54, skipping insertion in model container [2023-09-01 11:31:54,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:31:54,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:31:54,504 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/bench-exp1x3.wvr.c[1849,1862] [2023-09-01 11:31:54,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:31:54,521 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:31:54,542 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/bench-exp1x3.wvr.c[1849,1862] [2023-09-01 11:31:54,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:31:54,562 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:31:54,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54 WrapperNode [2023-09-01 11:31:54,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:31:54,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:31:54,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:31:54,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:31:54,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,598 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2023-09-01 11:31:54,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:31:54,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:31:54,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:31:54,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:31:54,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:31:54,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:31:54,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:31:54,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:31:54,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (1/1) ... [2023-09-01 11:31:54,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:31:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:31:54,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 11:31:54,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 11:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:31:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:31:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:31:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:31:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:31:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:31:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:31:54,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:31:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:31:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:31:54,723 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:31:54,819 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:31:54,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:31:55,047 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:31:55,053 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:31:55,053 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 11:31:55,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:31:55 BoogieIcfgContainer [2023-09-01 11:31:55,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:31:55,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:31:55,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:31:55,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:31:55,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:31:54" (1/3) ... [2023-09-01 11:31:55,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb0e86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:31:55, skipping insertion in model container [2023-09-01 11:31:55,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:31:54" (2/3) ... [2023-09-01 11:31:55,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb0e86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:31:55, skipping insertion in model container [2023-09-01 11:31:55,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:31:55" (3/3) ... [2023-09-01 11:31:55,074 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2023-09-01 11:31:55,081 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:31:55,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:31:55,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:31:55,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:31:55,200 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:31:55,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2023-09-01 11:31:55,313 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2023-09-01 11:31:55,313 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:31:55,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-09-01 11:31:55,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2023-09-01 11:31:55,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2023-09-01 11:31:55,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:31:55,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 67 transitions, 146 flow [2023-09-01 11:31:55,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 67 transitions, 146 flow [2023-09-01 11:31:55,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 146 flow [2023-09-01 11:31:55,372 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2023-09-01 11:31:55,372 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:31:55,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 6/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-09-01 11:31:55,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 252 [2023-09-01 11:31:57,412 INFO L134 LiptonReduction]: Checked pairs total: 297 [2023-09-01 11:31:57,413 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-09-01 11:31:57,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:31:57,430 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1dbbc4e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:31:57,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 11:31:57,435 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-09-01 11:31:57,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:31:57,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:57,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:57,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:57,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1136073076, now seen corresponding path program 1 times [2023-09-01 11:31:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:57,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219340146] [2023-09-01 11:31:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:57,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:57,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219340146] [2023-09-01 11:31:57,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219340146] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:31:57,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:31:57,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 11:31:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681336975] [2023-09-01 11:31:57,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:31:57,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:31:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:31:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:31:58,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-09-01 11:31:58,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:31:58,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-09-01 11:31:58,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:58,120 INFO L130 PetriNetUnfolder]: 41/77 cut-off events. [2023-09-01 11:31:58,121 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-09-01 11:31:58,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 77 events. 41/77 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 165 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 120. Up to 51 conditions per place. [2023-09-01 11:31:58,123 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-09-01 11:31:58,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 23 transitions, 113 flow [2023-09-01 11:31:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:31:58,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:31:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-09-01 11:31:58,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49295774647887325 [2023-09-01 11:31:58,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-09-01 11:31:58,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-09-01 11:31:58,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:58,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-09-01 11:31:58,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,160 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 210 transitions. [2023-09-01 11:31:58,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 23 transitions, 113 flow [2023-09-01 11:31:58,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 23 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:31:58,165 INFO L231 Difference]: Finished difference. Result has 17 places, 15 transitions, 49 flow [2023-09-01 11:31:58,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=49, PETRI_PLACES=17, PETRI_TRANSITIONS=15} [2023-09-01 11:31:58,171 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-09-01 11:31:58,171 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 15 transitions, 49 flow [2023-09-01 11:31:58,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:58,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:58,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:31:58,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:58,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:58,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1884749856, now seen corresponding path program 1 times [2023-09-01 11:31:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:58,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323565450] [2023-09-01 11:31:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:58,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:58,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323565450] [2023-09-01 11:31:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323565450] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:31:58,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:31:58,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:31:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336351061] [2023-09-01 11:31:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:31:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:31:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:31:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:31:58,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 11:31:58,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 49 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:31:58,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 11:31:58,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:58,476 INFO L130 PetriNetUnfolder]: 39/75 cut-off events. [2023-09-01 11:31:58,477 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 11:31:58,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 75 events. 39/75 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 165 event pairs, 2 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 55. Up to 28 conditions per place. [2023-09-01 11:31:58,479 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 24 selfloop transitions, 6 changer transitions 4/34 dead transitions. [2023-09-01 11:31:58,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 34 transitions, 165 flow [2023-09-01 11:31:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:31:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:31:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2023-09-01 11:31:58,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44366197183098594 [2023-09-01 11:31:58,486 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2023-09-01 11:31:58,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2023-09-01 11:31:58,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:58,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2023-09-01 11:31:58,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,494 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,494 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 49 flow. Second operand 5 states and 315 transitions. [2023-09-01 11:31:58,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 34 transitions, 165 flow [2023-09-01 11:31:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 34 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:31:58,496 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 70 flow [2023-09-01 11:31:58,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-09-01 11:31:58,497 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-09-01 11:31:58,497 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 70 flow [2023-09-01 11:31:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:58,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:58,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 11:31:58,499 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:58,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1479151157, now seen corresponding path program 1 times [2023-09-01 11:31:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:58,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485348167] [2023-09-01 11:31:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:58,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:58,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:58,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485348167] [2023-09-01 11:31:58,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485348167] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:31:58,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:31:58,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:31:58,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188587383] [2023-09-01 11:31:58,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:31:58,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:31:58,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:31:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:31:58,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 11:31:58,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:31:58,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 11:31:58,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:58,778 INFO L130 PetriNetUnfolder]: 32/66 cut-off events. [2023-09-01 11:31:58,778 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-09-01 11:31:58,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 66 events. 32/66 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 6 based on Foata normal form. 4/70 useless extension candidates. Maximal degree in co-relation 57. Up to 45 conditions per place. [2023-09-01 11:31:58,780 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 15 selfloop transitions, 3 changer transitions 8/26 dead transitions. [2023-09-01 11:31:58,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 142 flow [2023-09-01 11:31:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:31:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:31:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2023-09-01 11:31:58,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44190140845070425 [2023-09-01 11:31:58,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 251 transitions. [2023-09-01 11:31:58,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 251 transitions. [2023-09-01 11:31:58,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:58,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 251 transitions. [2023-09-01 11:31:58,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,785 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,785 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 70 flow. Second operand 4 states and 251 transitions. [2023-09-01 11:31:58,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 142 flow [2023-09-01 11:31:58,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 26 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:31:58,787 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 62 flow [2023-09-01 11:31:58,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-09-01 11:31:58,788 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2023-09-01 11:31:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 62 flow [2023-09-01 11:31:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:58,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:58,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 11:31:58,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:58,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1582616416, now seen corresponding path program 2 times [2023-09-01 11:31:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:58,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189141127] [2023-09-01 11:31:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:58,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:58,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189141127] [2023-09-01 11:31:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189141127] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:31:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662393863] [2023-09-01 11:31:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:31:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:31:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:31:58,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:31:58,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:31:58,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:31:58,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:31:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:31:58,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:31:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:59,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:31:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:59,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662393863] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:31:59,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:31:59,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-09-01 11:31:59,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756906549] [2023-09-01 11:31:59,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:31:59,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 11:31:59,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 11:31:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:31:59,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2023-09-01 11:31:59,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 62 flow. Second operand has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:31:59,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2023-09-01 11:31:59,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:59,466 INFO L130 PetriNetUnfolder]: 34/63 cut-off events. [2023-09-01 11:31:59,466 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-09-01 11:31:59,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 63 events. 34/63 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 4 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 49. Up to 39 conditions per place. [2023-09-01 11:31:59,467 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 22 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2023-09-01 11:31:59,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 155 flow [2023-09-01 11:31:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:31:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:31:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 310 transitions. [2023-09-01 11:31:59,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43661971830985913 [2023-09-01 11:31:59,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 310 transitions. [2023-09-01 11:31:59,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 310 transitions. [2023-09-01 11:31:59,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:59,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 310 transitions. [2023-09-01 11:31:59,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,472 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,472 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 62 flow. Second operand 5 states and 310 transitions. [2023-09-01 11:31:59,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 155 flow [2023-09-01 11:31:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 28 transitions, 147 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 11:31:59,474 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 91 flow [2023-09-01 11:31:59,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-09-01 11:31:59,475 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-09-01 11:31:59,475 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 91 flow [2023-09-01 11:31:59,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:59,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:59,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 11:31:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:31:59,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:59,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash 410010517, now seen corresponding path program 2 times [2023-09-01 11:31:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:59,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481884622] [2023-09-01 11:31:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:31:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:31:59,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:31:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481884622] [2023-09-01 11:31:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481884622] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:31:59,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:31:59,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:31:59,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545499155] [2023-09-01 11:31:59,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:31:59,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:31:59,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:31:59,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:31:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:31:59,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-09-01 11:31:59,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 56.4) internal successors, (282), 5 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:31:59,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-09-01 11:31:59,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:31:59,959 INFO L130 PetriNetUnfolder]: 40/73 cut-off events. [2023-09-01 11:31:59,959 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-09-01 11:31:59,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 73 events. 40/73 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 4 based on Foata normal form. 4/77 useless extension candidates. Maximal degree in co-relation 119. Up to 61 conditions per place. [2023-09-01 11:31:59,961 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 21 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2023-09-01 11:31:59,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 178 flow [2023-09-01 11:31:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:31:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:31:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2023-09-01 11:31:59,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169014084507042 [2023-09-01 11:31:59,963 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 296 transitions. [2023-09-01 11:31:59,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 296 transitions. [2023-09-01 11:31:59,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:31:59,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 296 transitions. [2023-09-01 11:31:59,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,966 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 91 flow. Second operand 5 states and 296 transitions. [2023-09-01 11:31:59,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 178 flow [2023-09-01 11:31:59,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 173 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:31:59,968 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 127 flow [2023-09-01 11:31:59,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-09-01 11:31:59,969 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 12 predicate places. [2023-09-01 11:31:59,969 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 127 flow [2023-09-01 11:31:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.4) internal successors, (282), 5 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:31:59,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:31:59,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:31:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:31:59,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:31:59,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:31:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash 656812837, now seen corresponding path program 1 times [2023-09-01 11:31:59,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:31:59,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960031737] [2023-09-01 11:31:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:31:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:31:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:32:00,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:32:00,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960031737] [2023-09-01 11:32:00,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960031737] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:32:00,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652062077] [2023-09-01 11:32:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:32:00,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:32:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:32:00,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:32:00,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:32:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:32:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:32:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:32:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:32:09,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:32:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:32:13,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652062077] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:32:13,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:32:13,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-09-01 11:32:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994370856] [2023-09-01 11:32:13,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:32:13,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 11:32:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:32:13,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 11:32:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=147, Unknown=2, NotChecked=0, Total=210 [2023-09-01 11:32:15,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:32:16,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:32:18,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:32:20,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:32:20,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-09-01 11:32:20,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 127 flow. Second operand has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:32:20,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:32:20,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-09-01 11:32:20,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:32:55,720 WARN L222 SmtUtils]: Spent 33.02s on a formula simplification. DAG size of input: 68 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:32:57,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:03,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:05,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:07,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:08,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:12,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:26,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:35,296 INFO L130 PetriNetUnfolder]: 113/219 cut-off events. [2023-09-01 11:33:35,297 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-09-01 11:33:35,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 219 events. 113/219 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 744 event pairs, 0 based on Foata normal form. 7/226 useless extension candidates. Maximal degree in co-relation 510. Up to 75 conditions per place. [2023-09-01 11:33:35,299 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 50 selfloop transitions, 28 changer transitions 22/100 dead transitions. [2023-09-01 11:33:35,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 100 transitions, 696 flow [2023-09-01 11:33:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:33:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:33:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1015 transitions. [2023-09-01 11:33:35,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204639602319801 [2023-09-01 11:33:35,304 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1015 transitions. [2023-09-01 11:33:35,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1015 transitions. [2023-09-01 11:33:35,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:33:35,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1015 transitions. [2023-09-01 11:33:35,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 59.705882352941174) internal successors, (1015), 17 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) [2023-09-01 11:33:35,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:35,310 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:35,310 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 127 flow. Second operand 17 states and 1015 transitions. [2023-09-01 11:33:35,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 100 transitions, 696 flow [2023-09-01 11:33:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 100 transitions, 669 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-09-01 11:33:35,315 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 380 flow [2023-09-01 11:33:35,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=380, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-09-01 11:33:35,316 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-09-01 11:33:35,316 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 380 flow [2023-09-01 11:33:35,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:35,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:33:35,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:33:35,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:33:35,525 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,SelfDestructingSolverStorable5 [2023-09-01 11:33:35,525 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:33:35,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:33:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1905891163, now seen corresponding path program 2 times [2023-09-01 11:33:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:33:35,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25601546] [2023-09-01 11:33:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:33:35,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:33:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:33:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:33:35,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:33:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25601546] [2023-09-01 11:33:35,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25601546] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:33:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725919837] [2023-09-01 11:33:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:33:35,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:33:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:33:35,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:33:35,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:33:36,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:33:36,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:33:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 11:33:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:33:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:33:43,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:33:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:33:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725919837] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:33:45,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:33:45,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-09-01 11:33:45,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550046120] [2023-09-01 11:33:45,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:33:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 11:33:45,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:33:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 11:33:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=150, Unknown=1, NotChecked=0, Total=210 [2023-09-01 11:33:47,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:51,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:51,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-09-01 11:33:51,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:33:51,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:33:51,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-09-01 11:33:51,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:33:54,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:56,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:33:58,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:11,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:13,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:19,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:21,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:23,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:26,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:28,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:30,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:32,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:38,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:40,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:42,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:44,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:45,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:52,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:53,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:55,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:34:57,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:35:02,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:35:04,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:35:06,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:35:07,393 INFO L130 PetriNetUnfolder]: 203/402 cut-off events. [2023-09-01 11:35:07,393 INFO L131 PetriNetUnfolder]: For 1016/1016 co-relation queries the response was YES. [2023-09-01 11:35:07,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 402 events. 203/402 cut-off events. For 1016/1016 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1742 event pairs, 14 based on Foata normal form. 5/407 useless extension candidates. Maximal degree in co-relation 1797. Up to 177 conditions per place. [2023-09-01 11:35:07,397 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 98 selfloop transitions, 35 changer transitions 13/146 dead transitions. [2023-09-01 11:35:07,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 146 transitions, 1230 flow [2023-09-01 11:35:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:35:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:35:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1091 transitions. [2023-09-01 11:35:07,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42683881064162754 [2023-09-01 11:35:07,401 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1091 transitions. [2023-09-01 11:35:07,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1091 transitions. [2023-09-01 11:35:07,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:35:07,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1091 transitions. [2023-09-01 11:35:07,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.611111111111114) internal successors, (1091), 18 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:07,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:07,408 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 142.0) internal successors, (2698), 19 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:07,408 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 380 flow. Second operand 18 states and 1091 transitions. [2023-09-01 11:35:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 146 transitions, 1230 flow [2023-09-01 11:35:07,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 146 transitions, 972 flow, removed 124 selfloop flow, removed 5 redundant places. [2023-09-01 11:35:07,419 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 581 flow [2023-09-01 11:35:07,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-09-01 11:35:07,420 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2023-09-01 11:35:07,420 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 581 flow [2023-09-01 11:35:07,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.333333333333336) internal successors, (845), 15 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:07,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:35:07,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:35:07,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:35:07,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:35:07,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:35:07,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:35:07,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1326326080, now seen corresponding path program 3 times [2023-09-01 11:35:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:35:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652442162] [2023-09-01 11:35:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:35:07,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:35:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:35:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:35:07,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:35:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652442162] [2023-09-01 11:35:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652442162] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:35:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952513672] [2023-09-01 11:35:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:35:07,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:35:07,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:35:07,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:35:07,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:35:07,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:35:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:35:07,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 11:35:07,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:35:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 11:35:07,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:35:07,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952513672] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:35:07,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:35:07,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-09-01 11:35:07,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817761866] [2023-09-01 11:35:07,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:35:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:35:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:35:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:35:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 11:35:08,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-09-01 11:35:08,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 581 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:08,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:35:08,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-09-01 11:35:08,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:35:08,084 INFO L130 PetriNetUnfolder]: 128/254 cut-off events. [2023-09-01 11:35:08,084 INFO L131 PetriNetUnfolder]: For 1023/1023 co-relation queries the response was YES. [2023-09-01 11:35:08,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 254 events. 128/254 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 950 event pairs, 30 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 1264. Up to 250 conditions per place. [2023-09-01 11:35:08,087 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 48 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-09-01 11:35:08,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 552 flow [2023-09-01 11:35:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:35:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:35:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-09-01 11:35:08,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47417840375586856 [2023-09-01 11:35:08,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-09-01 11:35:08,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-09-01 11:35:08,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:35:08,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-09-01 11:35:08,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:08,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:08,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:08,091 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 581 flow. Second operand 3 states and 202 transitions. [2023-09-01 11:35:08,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 552 flow [2023-09-01 11:35:08,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 401 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-09-01 11:35:08,097 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 303 flow [2023-09-01 11:35:08,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-09-01 11:35:08,100 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-09-01 11:35:08,100 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 303 flow [2023-09-01 11:35:08,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:35:08,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:35:08,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:35:08,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:35:08,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:35:08,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:35:08,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:35:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1432320, now seen corresponding path program 4 times [2023-09-01 11:35:08,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:35:08,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088000007] [2023-09-01 11:35:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:35:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:35:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:35:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:35:08,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:35:08,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088000007] [2023-09-01 11:35:08,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088000007] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:35:08,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694401702] [2023-09-01 11:35:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:35:08,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:35:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:35:08,590 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:35:08,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:35:38,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:35:38,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:35:38,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:35:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:35:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:35:46,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:36:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:36:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694401702] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:36:24,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:36:24,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 15 [2023-09-01 11:36:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956577432] [2023-09-01 11:36:24,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:36:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 11:36:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:36:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 11:36:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=166, Unknown=5, NotChecked=0, Total=240 [2023-09-01 11:36:25,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:27,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:30,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:32,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:35,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:36,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 142 [2023-09-01 11:36:36,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 303 flow. Second operand has 16 states, 16 states have (on average 51.3125) internal successors, (821), 16 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:36:36,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:36:36,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 142 [2023-09-01 11:36:36,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:36:38,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:48,662 WARN L222 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 39 DAG size of output: 18 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:36:51,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:36:53,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:00,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:02,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:09,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:11,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:13,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:17,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:19,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:22,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:25,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:33,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:37:34,661 INFO L130 PetriNetUnfolder]: 188/366 cut-off events. [2023-09-01 11:37:34,661 INFO L131 PetriNetUnfolder]: For 908/908 co-relation queries the response was YES. [2023-09-01 11:37:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 366 events. 188/366 cut-off events. For 908/908 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1461 event pairs, 8 based on Foata normal form. 12/378 useless extension candidates. Maximal degree in co-relation 1378. Up to 122 conditions per place. [2023-09-01 11:37:34,664 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 51 selfloop transitions, 50 changer transitions 23/124 dead transitions. [2023-09-01 11:37:34,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 124 transitions, 972 flow [2023-09-01 11:37:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:37:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:37:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 869 transitions. [2023-09-01 11:37:34,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824823943661972 [2023-09-01 11:37:34,668 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 869 transitions. [2023-09-01 11:37:34,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 869 transitions. [2023-09-01 11:37:34,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:37:34,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 869 transitions. [2023-09-01 11:37:34,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.3125) internal successors, (869), 16 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:34,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:34,674 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:34,674 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 303 flow. Second operand 16 states and 869 transitions. [2023-09-01 11:37:34,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 124 transitions, 972 flow [2023-09-01 11:37:34,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 124 transitions, 964 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 11:37:34,680 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 638 flow [2023-09-01 11:37:34,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=638, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-09-01 11:37:34,680 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 49 predicate places. [2023-09-01 11:37:34,680 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 638 flow [2023-09-01 11:37:34,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 51.3125) internal successors, (821), 16 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:37:34,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:37:34,681 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:37:34,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:37:34,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:34,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:37:34,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:37:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash 863368532, now seen corresponding path program 5 times [2023-09-01 11:37:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:37:34,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177974232] [2023-09-01 11:37:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:37:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:37:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:37:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:37:35,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:37:35,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177974232] [2023-09-01 11:37:35,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177974232] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:37:35,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206737641] [2023-09-01 11:37:35,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:37:35,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:37:35,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:37:35,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:37:35,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:39:01,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 11:39:01,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:39:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 11:39:01,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:39:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:39:08,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:40:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:40:25,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206737641] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:40:25,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:40:25,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2023-09-01 11:40:25,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003549785] [2023-09-01 11:40:25,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:40:25,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 11:40:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:40:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 11:40:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=153, Unknown=9, NotChecked=0, Total=210 [2023-09-01 11:40:27,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:28,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 142 [2023-09-01 11:40:28,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 638 flow. Second operand has 15 states, 15 states have (on average 56.46666666666667) internal successors, (847), 15 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:40:28,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:40:28,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 142 [2023-09-01 11:40:28,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:40:51,175 WARN L222 SmtUtils]: Spent 18.29s on a formula simplification. DAG size of input: 61 DAG size of output: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:40:53,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:55,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:57,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:40:59,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:03,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:06,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:08,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:10,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:12,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:16,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:18,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:21,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:23,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:25,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:27,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:29,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:31,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:33,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:35,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:37,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:39,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:41,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:43,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:45,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:47,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:49,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:51,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:53,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:55,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:57,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:41:59,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:01,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:03,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:05,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:11,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:12,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-09-01 11:42:13,205 INFO L130 PetriNetUnfolder]: 217/429 cut-off events. [2023-09-01 11:42:13,206 INFO L131 PetriNetUnfolder]: For 2226/2226 co-relation queries the response was YES. [2023-09-01 11:42:13,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 429 events. 217/429 cut-off events. For 2226/2226 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1882 event pairs, 0 based on Foata normal form. 16/445 useless extension candidates. Maximal degree in co-relation 1980. Up to 232 conditions per place. [2023-09-01 11:42:13,209 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 80 selfloop transitions, 40 changer transitions 8/128 dead transitions. [2023-09-01 11:42:13,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 1264 flow [2023-09-01 11:42:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:42:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:42:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 826 transitions. [2023-09-01 11:42:13,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154929577464789 [2023-09-01 11:42:13,214 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 826 transitions. [2023-09-01 11:42:13,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 826 transitions. [2023-09-01 11:42:13,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:42:13,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 826 transitions. [2023-09-01 11:42:13,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.0) internal successors, (826), 14 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:13,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:13,219 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 142.0) internal successors, (2130), 15 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:13,219 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 638 flow. Second operand 14 states and 826 transitions. [2023-09-01 11:42:13,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 1264 flow [2023-09-01 11:42:13,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 1147 flow, removed 53 selfloop flow, removed 5 redundant places. [2023-09-01 11:42:13,232 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 880 flow [2023-09-01 11:42:13,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=880, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2023-09-01 11:42:13,233 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 61 predicate places. [2023-09-01 11:42:13,234 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 880 flow [2023-09-01 11:42:13,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.46666666666667) internal successors, (847), 15 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:42:13,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:42:13,234 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:42:13,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:42:13,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:42:13,437 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:42:13,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:42:13,438 INFO L85 PathProgramCache]: Analyzing trace with hash 595204859, now seen corresponding path program 6 times [2023-09-01 11:42:13,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:42:13,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274915931] [2023-09-01 11:42:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:42:13,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:42:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:42:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:42:13,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:42:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274915931] [2023-09-01 11:42:13,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274915931] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:42:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475752749] [2023-09-01 11:42:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:42:13,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:42:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:42:13,578 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:42:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:45:53,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:45:53,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:45:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 11:45:53,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:46:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:46:00,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15