./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.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/chl-chromosome-trans.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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --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 11:59:33,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:59:33,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:59:33,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:59:33,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:59:33,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:59:33,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:59:33,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:59:33,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:59:33,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:59:33,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:59:33,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:59:33,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:59:33,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:59:33,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:59:33,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:59:33,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:59:33,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:59:33,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:59:33,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:59:33,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:59:33,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:59:33,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:59:33,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:59:33,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:59:33,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:59:33,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:59:33,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:59:33,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:59:33,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:59:33,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:59:33,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:59:33,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:59:33,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:59:33,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:59:33,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:59:33,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:59:33,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:59:33,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:59:33,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:59:33,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:59:33,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:59:33,608 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:59:33,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:59:33,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:59:33,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:59:33,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:59:33,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:59:33,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:59:33,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:59:33,610 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:59:33,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:59:33,611 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:59:33,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:59:33,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:59:33,612 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:59:33,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:59:33,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:59:33,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:59:33,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:59:33,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:59:33,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:59:33,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:59:33,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:59:33,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:59:33,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:59:33,614 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:59:33,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:59:33,614 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:59:33,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:59:33,615 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:59:33,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:59:33,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:59:33,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:59:33,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:59:33,878 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:59:33,878 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:59:33,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-09-01 11:59:34,876 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:59:35,020 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:59:35,021 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-09-01 11:59:35,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01f7110e/dcc4394ebac649b89e141e55cd16863b/FLAG168371449 [2023-09-01 11:59:35,043 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b01f7110e/dcc4394ebac649b89e141e55cd16863b [2023-09-01 11:59:35,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:59:35,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:59:35,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:59:35,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:59:35,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:59:35,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f09c4f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35, skipping insertion in model container [2023-09-01 11:59:35,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:59:35,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:59:35,179 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/chl-chromosome-trans.wvr.c[3034,3047] [2023-09-01 11:59:35,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:59:35,199 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:59:35,233 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/chl-chromosome-trans.wvr.c[3034,3047] [2023-09-01 11:59:35,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:59:35,249 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:59:35,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35 WrapperNode [2023-09-01 11:59:35,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:59:35,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:59:35,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:59:35,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:59:35,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,306 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 277 [2023-09-01 11:59:35,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:59:35,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:59:35,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:59:35,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:59:35,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:59:35,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:59:35,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:59:35,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:59:35,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (1/1) ... [2023-09-01 11:59:35,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:59:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:35,374 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 11:59:35,394 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 11:59:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:59:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:59:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:59:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:59:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:59:35,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:59:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:59:35,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:59:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 11:59:35,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 11:59:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:59:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:59:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:59:35,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:59:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:59:35,405 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 11:59:35,506 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:59:35,507 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:59:35,845 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:59:35,853 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:59:35,854 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 11:59:35,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:59:35 BoogieIcfgContainer [2023-09-01 11:59:35,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:59:35,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:59:35,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:59:35,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:59:35,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:59:35" (1/3) ... [2023-09-01 11:59:35,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e24ebd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:59:35, skipping insertion in model container [2023-09-01 11:59:35,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:59:35" (2/3) ... [2023-09-01 11:59:35,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e24ebd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:59:35, skipping insertion in model container [2023-09-01 11:59:35,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:59:35" (3/3) ... [2023-09-01 11:59:35,874 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-09-01 11:59:35,879 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:59:35,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:59:35,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:59:35,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:59:35,975 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:59:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 300 places, 318 transitions, 660 flow [2023-09-01 11:59:36,114 INFO L130 PetriNetUnfolder]: 28/315 cut-off events. [2023-09-01 11:59:36,114 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:59:36,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 315 events. 28/315 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 492 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-09-01 11:59:36,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 300 places, 318 transitions, 660 flow [2023-09-01 11:59:36,131 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 305 transitions, 628 flow [2023-09-01 11:59:36,133 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:59:36,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 305 transitions, 628 flow [2023-09-01 11:59:36,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 305 transitions, 628 flow [2023-09-01 11:59:36,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 305 transitions, 628 flow [2023-09-01 11:59:36,205 INFO L130 PetriNetUnfolder]: 28/305 cut-off events. [2023-09-01 11:59:36,205 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:59:36,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 305 events. 28/305 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 491 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 244. Up to 2 conditions per place. [2023-09-01 11:59:36,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-09-01 11:59:42,569 INFO L134 LiptonReduction]: Checked pairs total: 14128 [2023-09-01 11:59:42,570 INFO L136 LiptonReduction]: Total number of compositions: 343 [2023-09-01 11:59:42,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:59:42,584 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;@c27e25c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:59:42,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 11:59:42,588 INFO L130 PetriNetUnfolder]: 7/30 cut-off events. [2023-09-01 11:59:42,588 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:59:42,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:42,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:42,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:42,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash -153494726, now seen corresponding path program 1 times [2023-09-01 11:59:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:42,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398287479] [2023-09-01 11:59:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:42,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:42,886 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 11:59:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:42,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398287479] [2023-09-01 11:59:42,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398287479] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:42,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:42,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:59:42,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350981270] [2023-09-01 11:59:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:42,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:59:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:59:42,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:59:42,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 661 [2023-09-01 11:59:42,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:42,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:42,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 661 [2023-09-01 11:59:42,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:43,074 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2023-09-01 11:59:43,074 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-09-01 11:59:43,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1531 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-09-01 11:59:43,078 INFO L137 encePairwiseOnDemand]: 653/661 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-09-01 11:59:43,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-09-01 11:59:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:59:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:59:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-09-01 11:59:43,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437720625315179 [2023-09-01 11:59:43,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-09-01 11:59:43,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-09-01 11:59:43,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:43,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-09-01 11:59:43,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 661.0) internal successors, (2644), 4 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 661.0) internal successors, (2644), 4 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,135 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 868 transitions. [2023-09-01 11:59:43,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-09-01 11:59:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 11:59:43,139 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-09-01 11:59:43,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-09-01 11:59:43,142 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-09-01 11:59:43,142 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-09-01 11:59:43,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:43,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:59:43,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:43,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 567514681, now seen corresponding path program 1 times [2023-09-01 11:59:43,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:43,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725355850] [2023-09-01 11:59:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:59:43,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:43,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725355850] [2023-09-01 11:59:43,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725355850] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367458250] [2023-09-01 11:59:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:43,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:43,259 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 11:59:43,266 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 11:59:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:43,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 11:59:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:59:43,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:59:43,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367458250] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:43,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:43,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-09-01 11:59:43,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101958807] [2023-09-01 11:59:43,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:43,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:59:43,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:59:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:59:43,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 661 [2023-09-01 11:59:43,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 274.875) internal successors, (2199), 8 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:43,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 661 [2023-09-01 11:59:43,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:43,685 INFO L130 PetriNetUnfolder]: 370/554 cut-off events. [2023-09-01 11:59:43,685 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 11:59:43,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 554 events. 370/554 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1529 event pairs, 253 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1106. Up to 543 conditions per place. [2023-09-01 11:59:43,687 INFO L137 encePairwiseOnDemand]: 654/661 looper letters, 27 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-09-01 11:59:43,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 218 flow [2023-09-01 11:59:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:59:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:59:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1677 transitions. [2023-09-01 11:59:43,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228441754916793 [2023-09-01 11:59:43,691 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1677 transitions. [2023-09-01 11:59:43,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1677 transitions. [2023-09-01 11:59:43,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:43,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1677 transitions. [2023-09-01 11:59:43,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.5) internal successors, (1677), 6 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,703 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,703 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 6 states and 1677 transitions. [2023-09-01 11:59:43,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 218 flow [2023-09-01 11:59:43,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:59:43,705 INFO L231 Difference]: Finished difference. Result has 38 places, 42 transitions, 188 flow [2023-09-01 11:59:43,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=42} [2023-09-01 11:59:43,706 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-09-01 11:59:43,706 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 42 transitions, 188 flow [2023-09-01 11:59:43,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 274.875) internal successors, (2199), 8 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:43,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:43,708 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:43,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:59:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:43,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:43,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1258852288, now seen corresponding path program 2 times [2023-09-01 11:59:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:43,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021852211] [2023-09-01 11:59:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:59:44,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:44,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021852211] [2023-09-01 11:59:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021852211] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:44,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408879993] [2023-09-01 11:59:44,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:59:44,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:44,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:44,143 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 11:59:44,145 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 11:59:44,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:59:44,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:44,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 11:59:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:44,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:59:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408879993] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:44,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:59:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:59:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971931962] [2023-09-01 11:59:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:59:44,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:59:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:59:44,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 661 [2023-09-01 11:59:44,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:44,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:44,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 661 [2023-09-01 11:59:44,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:44,515 INFO L130 PetriNetUnfolder]: 644/962 cut-off events. [2023-09-01 11:59:44,516 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 11:59:44,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 962 events. 644/962 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3428 event pairs, 253 based on Foata normal form. 14/762 useless extension candidates. Maximal degree in co-relation 1928. Up to 555 conditions per place. [2023-09-01 11:59:44,519 INFO L137 encePairwiseOnDemand]: 657/661 looper letters, 69 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-09-01 11:59:44,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 407 flow [2023-09-01 11:59:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:59:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:59:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1199 transitions. [2023-09-01 11:59:44,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45347957639939485 [2023-09-01 11:59:44,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1199 transitions. [2023-09-01 11:59:44,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1199 transitions. [2023-09-01 11:59:44,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:44,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1199 transitions. [2023-09-01 11:59:44,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.75) internal successors, (1199), 4 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:44,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:44,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:44,529 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 188 flow. Second operand 4 states and 1199 transitions. [2023-09-01 11:59:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 407 flow [2023-09-01 11:59:44,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 11:59:44,531 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 184 flow [2023-09-01 11:59:44,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2023-09-01 11:59:44,532 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-09-01 11:59:44,532 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 184 flow [2023-09-01 11:59:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:44,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:44,533 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:44,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 11:59:44,738 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,SelfDestructingSolverStorable2 [2023-09-01 11:59:44,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:44,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash 445073096, now seen corresponding path program 3 times [2023-09-01 11:59:44,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:44,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867785441] [2023-09-01 11:59:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:59:44,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:44,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867785441] [2023-09-01 11:59:44,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867785441] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:44,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825851205] [2023-09-01 11:59:44,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:59:44,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:44,893 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 11:59:44,895 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 11:59:44,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:59:44,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 11:59:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:45,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:59:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825851205] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:59:45,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:59:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273724773] [2023-09-01 11:59:45,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:45,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:59:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:59:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:59:45,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 661 [2023-09-01 11:59:45,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:45,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:45,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 661 [2023-09-01 11:59:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:45,235 INFO L130 PetriNetUnfolder]: 758/1124 cut-off events. [2023-09-01 11:59:45,235 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2023-09-01 11:59:45,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1124 events. 758/1124 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4232 event pairs, 104 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 2598. Up to 775 conditions per place. [2023-09-01 11:59:45,239 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 63 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2023-09-01 11:59:45,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 392 flow [2023-09-01 11:59:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:59:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:59:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-09-01 11:59:45,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485627836611195 [2023-09-01 11:59:45,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-09-01 11:59:45,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-09-01 11:59:45,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:45,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-09-01 11:59:45,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:45,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:45,249 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:45,249 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 184 flow. Second operand 4 states and 1186 transitions. [2023-09-01 11:59:45,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 392 flow [2023-09-01 11:59:45,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:59:45,251 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 213 flow [2023-09-01 11:59:45,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-09-01 11:59:45,252 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-09-01 11:59:45,252 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 213 flow [2023-09-01 11:59:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:45,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:45,253 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:45,260 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 11:59:45,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:45,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:45,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash -447520588, now seen corresponding path program 4 times [2023-09-01 11:59:45,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:45,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031096636] [2023-09-01 11:59:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:59:45,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031096636] [2023-09-01 11:59:45,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031096636] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:45,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280013572] [2023-09-01 11:59:45,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:59:45,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:45,609 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 11:59:45,612 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 11:59:45,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:59:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:59:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:59:45,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:59:45,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280013572] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:45,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:45,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-09-01 11:59:45,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925534267] [2023-09-01 11:59:45,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:45,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 11:59:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 11:59:45,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-09-01 11:59:46,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 661 [2023-09-01 11:59:46,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 273.3529411764706) internal successors, (4647), 17 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:46,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 661 [2023-09-01 11:59:46,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:46,243 INFO L130 PetriNetUnfolder]: 758/1127 cut-off events. [2023-09-01 11:59:46,243 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-09-01 11:59:46,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 1127 events. 758/1127 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3903 event pairs, 525 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 2770. Up to 1113 conditions per place. [2023-09-01 11:59:46,247 INFO L137 encePairwiseOnDemand]: 654/661 looper letters, 31 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-09-01 11:59:46,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 329 flow [2023-09-01 11:59:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:59:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:59:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1945 transitions. [2023-09-01 11:59:46,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42035876377782583 [2023-09-01 11:59:46,251 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1945 transitions. [2023-09-01 11:59:46,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1945 transitions. [2023-09-01 11:59:46,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:46,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1945 transitions. [2023-09-01 11:59:46,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,259 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,260 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 213 flow. Second operand 7 states and 1945 transitions. [2023-09-01 11:59:46,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 329 flow [2023-09-01 11:59:46,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:59:46,262 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 278 flow [2023-09-01 11:59:46,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-09-01 11:59:46,262 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-09-01 11:59:46,262 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 278 flow [2023-09-01 11:59:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 273.3529411764706) internal successors, (4647), 17 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:46,264 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:46,269 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 11:59:46,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:46,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:46,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1897962517, now seen corresponding path program 5 times [2023-09-01 11:59:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:46,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129479668] [2023-09-01 11:59:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:46,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:59:46,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:46,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129479668] [2023-09-01 11:59:46,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129479668] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:46,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:46,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:59:46,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035233524] [2023-09-01 11:59:46,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:46,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:59:46,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:59:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:59:46,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 661 [2023-09-01 11:59:46,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:46,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 661 [2023-09-01 11:59:46,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:46,886 INFO L130 PetriNetUnfolder]: 659/978 cut-off events. [2023-09-01 11:59:46,897 INFO L131 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2023-09-01 11:59:46,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 978 events. 659/978 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3439 event pairs, 229 based on Foata normal form. 24/858 useless extension candidates. Maximal degree in co-relation 2402. Up to 582 conditions per place. [2023-09-01 11:59:46,901 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 68 selfloop transitions, 6 changer transitions 3/77 dead transitions. [2023-09-01 11:59:46,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 501 flow [2023-09-01 11:59:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:59:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:59:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1189 transitions. [2023-09-01 11:59:46,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44969742813918306 [2023-09-01 11:59:46,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1189 transitions. [2023-09-01 11:59:46,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1189 transitions. [2023-09-01 11:59:46,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:46,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1189 transitions. [2023-09-01 11:59:46,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,910 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 278 flow. Second operand 4 states and 1189 transitions. [2023-09-01 11:59:46,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 501 flow [2023-09-01 11:59:46,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 465 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 11:59:46,913 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 262 flow [2023-09-01 11:59:46,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-09-01 11:59:46,914 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-09-01 11:59:46,915 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 262 flow [2023-09-01 11:59:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:46,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:46,915 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:46,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 11:59:46,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:46,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash 372837355, now seen corresponding path program 1 times [2023-09-01 11:59:46,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:46,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662380483] [2023-09-01 11:59:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:46,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:47,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:47,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662380483] [2023-09-01 11:59:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662380483] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:47,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:47,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 11:59:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514616601] [2023-09-01 11:59:47,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:47,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:59:47,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:59:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:59:47,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 661 [2023-09-01 11:59:47,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:47,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 661 [2023-09-01 11:59:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:47,276 INFO L130 PetriNetUnfolder]: 976/1420 cut-off events. [2023-09-01 11:59:47,276 INFO L131 PetriNetUnfolder]: For 1859/1859 co-relation queries the response was YES. [2023-09-01 11:59:47,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3968 conditions, 1420 events. 976/1420 cut-off events. For 1859/1859 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5119 event pairs, 250 based on Foata normal form. 1/1175 useless extension candidates. Maximal degree in co-relation 3870. Up to 916 conditions per place. [2023-09-01 11:59:47,282 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 71 selfloop transitions, 6 changer transitions 2/79 dead transitions. [2023-09-01 11:59:47,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 548 flow [2023-09-01 11:59:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:59:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:59:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1167 transitions. [2023-09-01 11:59:47,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413767019667171 [2023-09-01 11:59:47,285 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1167 transitions. [2023-09-01 11:59:47,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1167 transitions. [2023-09-01 11:59:47,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:47,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1167 transitions. [2023-09-01 11:59:47,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 291.75) internal successors, (1167), 4 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,299 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 661.0) internal successors, (3305), 5 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,299 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 262 flow. Second operand 4 states and 1167 transitions. [2023-09-01 11:59:47,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 548 flow [2023-09-01 11:59:47,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 520 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 11:59:47,307 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 294 flow [2023-09-01 11:59:47,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-09-01 11:59:47,308 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-09-01 11:59:47,308 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 294 flow [2023-09-01 11:59:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 284.75) internal successors, (1139), 4 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:47,313 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:47,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 11:59:47,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:47,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1786123932, now seen corresponding path program 1 times [2023-09-01 11:59:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066603853] [2023-09-01 11:59:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066603853] [2023-09-01 11:59:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066603853] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:47,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:59:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607701439] [2023-09-01 11:59:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:47,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:59:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:59:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:59:47,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 661 [2023-09-01 11:59:47,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:47,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 661 [2023-09-01 11:59:47,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:47,874 INFO L130 PetriNetUnfolder]: 1778/2594 cut-off events. [2023-09-01 11:59:47,874 INFO L131 PetriNetUnfolder]: For 2916/2916 co-relation queries the response was YES. [2023-09-01 11:59:47,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2594 events. 1778/2594 cut-off events. For 2916/2916 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11140 event pairs, 691 based on Foata normal form. 20/2402 useless extension candidates. Maximal degree in co-relation 7186. Up to 1445 conditions per place. [2023-09-01 11:59:47,883 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 85 selfloop transitions, 5 changer transitions 17/107 dead transitions. [2023-09-01 11:59:47,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 719 flow [2023-09-01 11:59:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:59:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:59:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1478 transitions. [2023-09-01 11:59:47,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44720121028744325 [2023-09-01 11:59:47,886 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1478 transitions. [2023-09-01 11:59:47,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1478 transitions. [2023-09-01 11:59:47,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:47,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1478 transitions. [2023-09-01 11:59:47,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.6) internal successors, (1478), 5 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,892 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,892 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 294 flow. Second operand 5 states and 1478 transitions. [2023-09-01 11:59:47,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 719 flow [2023-09-01 11:59:47,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 107 transitions, 717 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 11:59:47,895 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 320 flow [2023-09-01 11:59:47,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-09-01 11:59:47,896 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2023-09-01 11:59:47,896 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 320 flow [2023-09-01 11:59:47,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 286.6) internal successors, (1433), 5 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:47,897 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:47,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:59:47,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:47,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash 412239492, now seen corresponding path program 2 times [2023-09-01 11:59:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:47,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857893224] [2023-09-01 11:59:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:48,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:48,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857893224] [2023-09-01 11:59:48,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857893224] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:48,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336254575] [2023-09-01 11:59:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:59:48,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:48,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:48,069 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 11:59:48,071 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 11:59:48,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:59:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 11:59:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:48,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:48,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336254575] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:48,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 11:59:48,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-09-01 11:59:48,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324091456] [2023-09-01 11:59:48,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:48,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:59:48,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:48,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:59:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:59:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-09-01 11:59:48,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:48,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:48,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-09-01 11:59:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:48,779 INFO L130 PetriNetUnfolder]: 1810/2621 cut-off events. [2023-09-01 11:59:48,779 INFO L131 PetriNetUnfolder]: For 4276/4276 co-relation queries the response was YES. [2023-09-01 11:59:48,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8286 conditions, 2621 events. 1810/2621 cut-off events. For 4276/4276 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10967 event pairs, 221 based on Foata normal form. 36/2657 useless extension candidates. Maximal degree in co-relation 8182. Up to 695 conditions per place. [2023-09-01 11:59:48,790 INFO L137 encePairwiseOnDemand]: 653/661 looper letters, 113 selfloop transitions, 18 changer transitions 4/135 dead transitions. [2023-09-01 11:59:48,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 135 transitions, 962 flow [2023-09-01 11:59:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:59:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:59:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2042 transitions. [2023-09-01 11:59:48,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44132267127728547 [2023-09-01 11:59:48,795 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2042 transitions. [2023-09-01 11:59:48,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2042 transitions. [2023-09-01 11:59:48,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:48,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2042 transitions. [2023-09-01 11:59:48,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 291.7142857142857) internal successors, (2042), 7 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:48,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:48,803 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 661.0) internal successors, (5288), 8 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:48,803 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 320 flow. Second operand 7 states and 2042 transitions. [2023-09-01 11:59:48,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 135 transitions, 962 flow [2023-09-01 11:59:48,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 135 transitions, 948 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 11:59:48,811 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 425 flow [2023-09-01 11:59:48,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2023-09-01 11:59:48,811 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 31 predicate places. [2023-09-01 11:59:48,811 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 425 flow [2023-09-01 11:59:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:48,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:48,812 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:48,821 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 11:59:49,018 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 11:59:49,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:49,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -191395198, now seen corresponding path program 3 times [2023-09-01 11:59:49,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:49,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782829019] [2023-09-01 11:59:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:49,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782829019] [2023-09-01 11:59:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782829019] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:49,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:49,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:59:49,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448095740] [2023-09-01 11:59:49,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:49,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:59:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:59:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:59:49,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 661 [2023-09-01 11:59:49,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:49,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:49,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 661 [2023-09-01 11:59:49,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:49,622 INFO L130 PetriNetUnfolder]: 2058/2982 cut-off events. [2023-09-01 11:59:49,622 INFO L131 PetriNetUnfolder]: For 5964/5964 co-relation queries the response was YES. [2023-09-01 11:59:49,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10320 conditions, 2982 events. 2058/2982 cut-off events. For 5964/5964 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12878 event pairs, 633 based on Foata normal form. 20/3002 useless extension candidates. Maximal degree in co-relation 10214. Up to 1481 conditions per place. [2023-09-01 11:59:49,633 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 93 selfloop transitions, 13 changer transitions 16/122 dead transitions. [2023-09-01 11:59:49,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 122 transitions, 927 flow [2023-09-01 11:59:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:59:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:59:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1473 transitions. [2023-09-01 11:59:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44568835098335857 [2023-09-01 11:59:49,637 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1473 transitions. [2023-09-01 11:59:49,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1473 transitions. [2023-09-01 11:59:49,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:49,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1473 transitions. [2023-09-01 11:59:49,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.6) internal successors, (1473), 5 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:49,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:49,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:49,642 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 425 flow. Second operand 5 states and 1473 transitions. [2023-09-01 11:59:49,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 122 transitions, 927 flow [2023-09-01 11:59:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 912 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:59:49,657 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 507 flow [2023-09-01 11:59:49,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=507, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-09-01 11:59:49,658 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2023-09-01 11:59:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 507 flow [2023-09-01 11:59:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:49,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:49,659 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 11:59:49,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:49,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1805816700, now seen corresponding path program 4 times [2023-09-01 11:59:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803131415] [2023-09-01 11:59:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:49,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:49,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803131415] [2023-09-01 11:59:49,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803131415] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:49,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:49,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:59:49,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315185750] [2023-09-01 11:59:49,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:49,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:59:49,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:59:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:59:49,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 661 [2023-09-01 11:59:49,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 507 flow. Second operand has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:49,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:49,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 661 [2023-09-01 11:59:49,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:50,231 INFO L130 PetriNetUnfolder]: 1966/2849 cut-off events. [2023-09-01 11:59:50,232 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-09-01 11:59:50,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10552 conditions, 2849 events. 1966/2849 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12097 event pairs, 683 based on Foata normal form. 20/2869 useless extension candidates. Maximal degree in co-relation 10442. Up to 1800 conditions per place. [2023-09-01 11:59:50,249 INFO L137 encePairwiseOnDemand]: 656/661 looper letters, 87 selfloop transitions, 14 changer transitions 18/119 dead transitions. [2023-09-01 11:59:50,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 119 transitions, 984 flow [2023-09-01 11:59:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 11:59:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 11:59:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1470 transitions. [2023-09-01 11:59:50,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44478063540090773 [2023-09-01 11:59:50,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1470 transitions. [2023-09-01 11:59:50,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1470 transitions. [2023-09-01 11:59:50,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:50,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1470 transitions. [2023-09-01 11:59:50,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.0) internal successors, (1470), 5 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 661.0) internal successors, (3966), 6 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,259 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 507 flow. Second operand 5 states and 1470 transitions. [2023-09-01 11:59:50,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 119 transitions, 984 flow [2023-09-01 11:59:50,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 967 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 11:59:50,277 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 590 flow [2023-09-01 11:59:50,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-09-01 11:59:50,278 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 40 predicate places. [2023-09-01 11:59:50,278 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 590 flow [2023-09-01 11:59:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.6) internal successors, (1428), 5 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:50,278 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:50,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 11:59:50,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:50,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:50,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1234754154, now seen corresponding path program 5 times [2023-09-01 11:59:50,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:50,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404392204] [2023-09-01 11:59:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:50,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:50,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404392204] [2023-09-01 11:59:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404392204] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:50,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:50,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:59:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537754715] [2023-09-01 11:59:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:59:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:59:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:59:50,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-09-01 11:59:50,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 590 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:50,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-09-01 11:59:50,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:50,923 INFO L130 PetriNetUnfolder]: 1982/2860 cut-off events. [2023-09-01 11:59:50,923 INFO L131 PetriNetUnfolder]: For 9015/9015 co-relation queries the response was YES. [2023-09-01 11:59:50,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 2860 events. 1982/2860 cut-off events. For 9015/9015 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12057 event pairs, 587 based on Foata normal form. 36/2896 useless extension candidates. Maximal degree in co-relation 10758. Up to 1481 conditions per place. [2023-09-01 11:59:50,934 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 113 selfloop transitions, 20 changer transitions 2/135 dead transitions. [2023-09-01 11:59:50,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 1110 flow [2023-09-01 11:59:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:59:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:59:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1757 transitions. [2023-09-01 11:59:50,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44301563287947554 [2023-09-01 11:59:50,938 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1757 transitions. [2023-09-01 11:59:50,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1757 transitions. [2023-09-01 11:59:50,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:50,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1757 transitions. [2023-09-01 11:59:50,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.8333333333333) internal successors, (1757), 6 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,944 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 590 flow. Second operand 6 states and 1757 transitions. [2023-09-01 11:59:50,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 1110 flow [2023-09-01 11:59:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 135 transitions, 1091 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:59:50,964 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 659 flow [2023-09-01 11:59:50,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-09-01 11:59:50,965 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2023-09-01 11:59:50,965 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 659 flow [2023-09-01 11:59:50,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:50,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:50,966 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:50,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:59:50,966 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:50,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:50,967 INFO L85 PathProgramCache]: Analyzing trace with hash -960619028, now seen corresponding path program 6 times [2023-09-01 11:59:50,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:50,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947646095] [2023-09-01 11:59:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:50,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-09-01 11:59:51,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947646095] [2023-09-01 11:59:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947646095] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:59:51,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:59:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 11:59:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004703256] [2023-09-01 11:59:51,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:59:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 11:59:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 11:59:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 11:59:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 661 [2023-09-01 11:59:51,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 659 flow. Second operand has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:51,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 661 [2023-09-01 11:59:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:51,537 INFO L130 PetriNetUnfolder]: 1978/2850 cut-off events. [2023-09-01 11:59:51,537 INFO L131 PetriNetUnfolder]: For 10685/10685 co-relation queries the response was YES. [2023-09-01 11:59:51,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 2850 events. 1978/2850 cut-off events. For 10685/10685 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11901 event pairs, 669 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11499. Up to 1666 conditions per place. [2023-09-01 11:59:51,550 INFO L137 encePairwiseOnDemand]: 655/661 looper letters, 110 selfloop transitions, 16 changer transitions 5/131 dead transitions. [2023-09-01 11:59:51,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1155 flow [2023-09-01 11:59:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:59:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:59:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1752 transitions. [2023-09-01 11:59:51,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44175491679273826 [2023-09-01 11:59:51,554 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1752 transitions. [2023-09-01 11:59:51,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1752 transitions. [2023-09-01 11:59:51,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:51,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1752 transitions. [2023-09-01 11:59:51,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 292.0) internal successors, (1752), 6 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,561 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 661.0) internal successors, (4627), 7 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,561 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 659 flow. Second operand 6 states and 1752 transitions. [2023-09-01 11:59:51,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1155 flow [2023-09-01 11:59:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 1135 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 11:59:51,589 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 675 flow [2023-09-01 11:59:51,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-09-01 11:59:51,590 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2023-09-01 11:59:51,590 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 675 flow [2023-09-01 11:59:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:51,591 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 11:59:51,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 11:59:51,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1450948268, now seen corresponding path program 1 times [2023-09-01 11:59:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:51,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085671662] [2023-09-01 11:59:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:53,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:53,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085671662] [2023-09-01 11:59:53,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085671662] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:53,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239983242] [2023-09-01 11:59:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:53,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:53,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:53,595 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 11:59:53,596 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 11:59:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 11:59:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:59:54,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:59:54,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:54,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 11:59:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 11:59:54,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:55,165 INFO L321 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-09-01 11:59:55,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 233 [2023-09-01 11:59:55,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:55,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 156 [2023-09-01 12:00:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:04,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239983242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:04,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 12] total 47 [2023-09-01 12:00:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270474557] [2023-09-01 12:00:04,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 12:00:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 12:00:04,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2134, Unknown=29, NotChecked=0, Total=2352 [2023-09-01 12:00:07,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 661 [2023-09-01 12:00:07,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 675 flow. Second operand has 49 states, 49 states have (on average 194.85714285714286) internal successors, (9548), 49 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:07,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:07,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 661 [2023-09-01 12:00:07,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:12,511 INFO L130 PetriNetUnfolder]: 5790/8410 cut-off events. [2023-09-01 12:00:12,511 INFO L131 PetriNetUnfolder]: For 30070/30070 co-relation queries the response was YES. [2023-09-01 12:00:12,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33259 conditions, 8410 events. 5790/8410 cut-off events. For 30070/30070 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44922 event pairs, 435 based on Foata normal form. 3/8413 useless extension candidates. Maximal degree in co-relation 33144. Up to 2105 conditions per place. [2023-09-01 12:00:12,545 INFO L137 encePairwiseOnDemand]: 641/661 looper letters, 361 selfloop transitions, 190 changer transitions 28/579 dead transitions. [2023-09-01 12:00:12,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 579 transitions, 5132 flow [2023-09-01 12:00:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 12:00:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 12:00:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7931 transitions. [2023-09-01 12:00:12,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3076535164281004 [2023-09-01 12:00:12,559 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7931 transitions. [2023-09-01 12:00:12,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7931 transitions. [2023-09-01 12:00:12,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:12,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7931 transitions. [2023-09-01 12:00:12,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 203.35897435897436) internal successors, (7931), 39 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:12,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 661.0) internal successors, (26440), 40 states have internal predecessors, (26440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:12,591 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 661.0) internal successors, (26440), 40 states have internal predecessors, (26440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:12,592 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 675 flow. Second operand 39 states and 7931 transitions. [2023-09-01 12:00:12,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 579 transitions, 5132 flow [2023-09-01 12:00:12,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 579 transitions, 4672 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-09-01 12:00:12,697 INFO L231 Difference]: Finished difference. Result has 135 places, 274 transitions, 3074 flow [2023-09-01 12:00:12,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3074, PETRI_PLACES=135, PETRI_TRANSITIONS=274} [2023-09-01 12:00:12,698 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2023-09-01 12:00:12,698 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 274 transitions, 3074 flow [2023-09-01 12:00:12,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 194.85714285714286) internal successors, (9548), 49 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:12,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:12,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:12,708 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 12:00:12,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:12,908 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:00:12,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash -926238340, now seen corresponding path program 2 times [2023-09-01 12:00:12,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:12,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934354330] [2023-09-01 12:00:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:12,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934354330] [2023-09-01 12:00:14,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934354330] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315501349] [2023-09-01 12:00:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:00:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:14,464 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 12:00:14,466 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 12:00:14,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:00:14,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:14,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 12:00:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:15,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:15,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:00:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:15,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:15,679 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:00:15,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:00:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315501349] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:15,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 44 [2023-09-01 12:00:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119738071] [2023-09-01 12:00:15,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 12:00:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 12:00:15,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2023-09-01 12:00:19,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-09-01 12:00:19,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 274 transitions, 3074 flow. Second operand has 45 states, 45 states have (on average 237.0222222222222) internal successors, (10666), 45 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:19,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:19,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-09-01 12:00:19,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:23,047 INFO L130 PetriNetUnfolder]: 7422/10743 cut-off events. [2023-09-01 12:00:23,047 INFO L131 PetriNetUnfolder]: For 69629/69629 co-relation queries the response was YES. [2023-09-01 12:00:23,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56089 conditions, 10743 events. 7422/10743 cut-off events. For 69629/69629 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 59319 event pairs, 1470 based on Foata normal form. 2/10745 useless extension candidates. Maximal degree in co-relation 55941. Up to 6321 conditions per place. [2023-09-01 12:00:23,104 INFO L137 encePairwiseOnDemand]: 642/661 looper letters, 264 selfloop transitions, 264 changer transitions 125/653 dead transitions. [2023-09-01 12:00:23,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 653 transitions, 7992 flow [2023-09-01 12:00:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 12:00:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 12:00:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6808 transitions. [2023-09-01 12:00:23,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678409336503134 [2023-09-01 12:00:23,110 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6808 transitions. [2023-09-01 12:00:23,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6808 transitions. [2023-09-01 12:00:23,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:23,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6808 transitions. [2023-09-01 12:00:23,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 243.14285714285714) internal successors, (6808), 28 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,126 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,126 INFO L175 Difference]: Start difference. First operand has 135 places, 274 transitions, 3074 flow. Second operand 28 states and 6808 transitions. [2023-09-01 12:00:23,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 653 transitions, 7992 flow [2023-09-01 12:00:23,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 653 transitions, 7775 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-09-01 12:00:23,431 INFO L231 Difference]: Finished difference. Result has 172 places, 406 transitions, 5443 flow [2023-09-01 12:00:23,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5443, PETRI_PLACES=172, PETRI_TRANSITIONS=406} [2023-09-01 12:00:23,432 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-09-01 12:00:23,432 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 406 transitions, 5443 flow [2023-09-01 12:00:23,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 237.0222222222222) internal successors, (10666), 45 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:23,433 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:23,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 12:00:23,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:23,644 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:00:23,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -958745844, now seen corresponding path program 3 times [2023-09-01 12:00:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:23,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885616261] [2023-09-01 12:00:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885616261] [2023-09-01 12:00:24,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885616261] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352421786] [2023-09-01 12:00:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:00:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:24,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:24,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:00:24,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:00:24,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:00:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:25,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:25,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:00:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:25,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:25,635 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:00:25,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:00:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352421786] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:25,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:25,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-09-01 12:00:25,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689771699] [2023-09-01 12:00:25,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:00:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:00:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:00:27,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:00:27,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 406 transitions, 5443 flow. Second operand has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:27,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:27,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:00:27,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:31,119 INFO L130 PetriNetUnfolder]: 8638/12483 cut-off events. [2023-09-01 12:00:31,119 INFO L131 PetriNetUnfolder]: For 151315/151315 co-relation queries the response was YES. [2023-09-01 12:00:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85708 conditions, 12483 events. 8638/12483 cut-off events. For 151315/151315 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 70202 event pairs, 1855 based on Foata normal form. 2/12485 useless extension candidates. Maximal degree in co-relation 85544. Up to 5896 conditions per place. [2023-09-01 12:00:31,207 INFO L137 encePairwiseOnDemand]: 646/661 looper letters, 364 selfloop transitions, 301 changer transitions 13/678 dead transitions. [2023-09-01 12:00:31,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 678 transitions, 9762 flow [2023-09-01 12:00:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:00:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:00:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 5176 transitions. [2023-09-01 12:00:31,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39152798789712556 [2023-09-01 12:00:31,212 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 5176 transitions. [2023-09-01 12:00:31,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 5176 transitions. [2023-09-01 12:00:31,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:31,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 5176 transitions. [2023-09-01 12:00:31,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 258.8) internal successors, (5176), 20 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:31,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 661.0) internal successors, (13881), 21 states have internal predecessors, (13881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:31,223 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 661.0) internal successors, (13881), 21 states have internal predecessors, (13881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:31,223 INFO L175 Difference]: Start difference. First operand has 172 places, 406 transitions, 5443 flow. Second operand 20 states and 5176 transitions. [2023-09-01 12:00:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 678 transitions, 9762 flow [2023-09-01 12:00:32,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 678 transitions, 9419 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-09-01 12:00:32,287 INFO L231 Difference]: Finished difference. Result has 186 places, 487 transitions, 7084 flow [2023-09-01 12:00:32,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=5172, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7084, PETRI_PLACES=186, PETRI_TRANSITIONS=487} [2023-09-01 12:00:32,287 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 152 predicate places. [2023-09-01 12:00:32,287 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 487 transitions, 7084 flow [2023-09-01 12:00:32,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:32,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:32,289 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:32,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:32,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:00:32,489 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:00:32,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:32,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1719213602, now seen corresponding path program 4 times [2023-09-01 12:00:32,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:32,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866297305] [2023-09-01 12:00:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:32,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866297305] [2023-09-01 12:00:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866297305] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848327959] [2023-09-01 12:00:33,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:00:33,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:33,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:33,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:00:33,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:00:33,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:00:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:34,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:34,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:00:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:34,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:34,469 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:00:34,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:00:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:34,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848327959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:34,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:34,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-09-01 12:00:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084239602] [2023-09-01 12:00:34,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:34,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 12:00:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 12:00:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 12:00:36,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:00:36,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 487 transitions, 7084 flow. Second operand has 33 states, 33 states have (on average 250.24242424242425) internal successors, (8258), 33 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:36,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:36,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:00:36,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:40,947 INFO L130 PetriNetUnfolder]: 10045/14543 cut-off events. [2023-09-01 12:00:40,947 INFO L131 PetriNetUnfolder]: For 200844/200844 co-relation queries the response was YES. [2023-09-01 12:00:41,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104686 conditions, 14543 events. 10045/14543 cut-off events. For 200844/200844 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 84704 event pairs, 1848 based on Foata normal form. 1/14544 useless extension candidates. Maximal degree in co-relation 104524. Up to 6180 conditions per place. [2023-09-01 12:00:41,058 INFO L137 encePairwiseOnDemand]: 646/661 looper letters, 392 selfloop transitions, 483 changer transitions 20/895 dead transitions. [2023-09-01 12:00:41,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 895 transitions, 13581 flow [2023-09-01 12:00:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 12:00:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 12:00:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7489 transitions. [2023-09-01 12:00:41,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906828733893265 [2023-09-01 12:00:41,064 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7489 transitions. [2023-09-01 12:00:41,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7489 transitions. [2023-09-01 12:00:41,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:41,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7489 transitions. [2023-09-01 12:00:41,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 258.2413793103448) internal successors, (7489), 29 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:41,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 661.0) internal successors, (19830), 30 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:41,083 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 661.0) internal successors, (19830), 30 states have internal predecessors, (19830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:41,083 INFO L175 Difference]: Start difference. First operand has 186 places, 487 transitions, 7084 flow. Second operand 29 states and 7489 transitions. [2023-09-01 12:00:41,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 895 transitions, 13581 flow [2023-09-01 12:00:42,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 895 transitions, 13303 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-09-01 12:00:42,450 INFO L231 Difference]: Finished difference. Result has 218 places, 665 transitions, 10888 flow [2023-09-01 12:00:42,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10888, PETRI_PLACES=218, PETRI_TRANSITIONS=665} [2023-09-01 12:00:42,451 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 184 predicate places. [2023-09-01 12:00:42,451 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 665 transitions, 10888 flow [2023-09-01 12:00:42,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 250.24242424242425) internal successors, (8258), 33 states have internal predecessors, (8258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:42,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:42,452 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:42,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 12:00:42,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 12:00:42,659 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:00:42,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash 88049456, now seen corresponding path program 5 times [2023-09-01 12:00:42,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:42,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20829655] [2023-09-01 12:00:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:43,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20829655] [2023-09-01 12:00:43,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20829655] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:43,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111181623] [2023-09-01 12:00:43,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:00:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:43,440 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:43,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:00:43,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:00:43,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 12:00:43,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:43,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:43,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-09-01 12:00:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:43,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:46,431 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:00:46,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:00:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:00:46,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111181623] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:46,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:46,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 34 [2023-09-01 12:00:46,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464249976] [2023-09-01 12:00:46,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:46,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:00:46,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:00:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:00:48,685 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 [1] [2023-09-01 12:00:51,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:00:54,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:00:56,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:00:58,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 12:01:01,246 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 [1] [2023-09-01 12:01:01,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 661 [2023-09-01 12:01:01,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 665 transitions, 10888 flow. Second operand has 35 states, 35 states have (on average 244.22857142857143) internal successors, (8548), 35 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:01,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:01,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 661 [2023-09-01 12:01:01,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:06,248 INFO L130 PetriNetUnfolder]: 11137/16109 cut-off events. [2023-09-01 12:01:06,248 INFO L131 PetriNetUnfolder]: For 270755/270755 co-relation queries the response was YES. [2023-09-01 12:01:06,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127209 conditions, 16109 events. 11137/16109 cut-off events. For 270755/270755 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 95215 event pairs, 2162 based on Foata normal form. 1/16110 useless extension candidates. Maximal degree in co-relation 127035. Up to 6330 conditions per place. [2023-09-01 12:01:06,397 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 385 selfloop transitions, 505 changer transitions 13/903 dead transitions. [2023-09-01 12:01:06,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 903 transitions, 15449 flow [2023-09-01 12:01:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:01:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:01:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5559 transitions. [2023-09-01 12:01:06,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38227203960940725 [2023-09-01 12:01:06,405 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5559 transitions. [2023-09-01 12:01:06,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5559 transitions. [2023-09-01 12:01:06,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:06,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5559 transitions. [2023-09-01 12:01:06,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 252.6818181818182) internal successors, (5559), 22 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:06,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:06,421 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:06,422 INFO L175 Difference]: Start difference. First operand has 218 places, 665 transitions, 10888 flow. Second operand 22 states and 5559 transitions. [2023-09-01 12:01:06,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 903 transitions, 15449 flow [2023-09-01 12:01:09,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 903 transitions, 15195 flow, removed 73 selfloop flow, removed 10 redundant places. [2023-09-01 12:01:09,050 INFO L231 Difference]: Finished difference. Result has 236 places, 715 transitions, 12682 flow [2023-09-01 12:01:09,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=10639, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12682, PETRI_PLACES=236, PETRI_TRANSITIONS=715} [2023-09-01 12:01:09,051 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 202 predicate places. [2023-09-01 12:01:09,052 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 715 transitions, 12682 flow [2023-09-01 12:01:09,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 244.22857142857143) internal successors, (8548), 35 states have internal predecessors, (8548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:09,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:09,053 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:09,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 12:01:09,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:01:09,257 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:01:09,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1841694086, now seen corresponding path program 6 times [2023-09-01 12:01:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:09,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766718633] [2023-09-01 12:01:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:10,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:10,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766718633] [2023-09-01 12:01:10,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766718633] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:10,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061510813] [2023-09-01 12:01:10,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:01:10,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:10,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:10,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:01:10,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:01:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:01:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:10,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:10,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:01:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:10,944 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:01:10,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:01:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:11,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061510813] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:11,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:11,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-09-01 12:01:11,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095204160] [2023-09-01 12:01:11,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:11,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 12:01:11,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:11,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 12:01:11,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-09-01 12:01:12,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:01:12,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 715 transitions, 12682 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:12,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:12,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:01:12,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:17,421 INFO L130 PetriNetUnfolder]: 11255/16280 cut-off events. [2023-09-01 12:01:17,421 INFO L131 PetriNetUnfolder]: For 319224/319224 co-relation queries the response was YES. [2023-09-01 12:01:17,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135646 conditions, 16280 events. 11255/16280 cut-off events. For 319224/319224 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 96359 event pairs, 2338 based on Foata normal form. 1/16281 useless extension candidates. Maximal degree in co-relation 135466. Up to 6819 conditions per place. [2023-09-01 12:01:17,572 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 406 selfloop transitions, 489 changer transitions 16/911 dead transitions. [2023-09-01 12:01:17,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 911 transitions, 16645 flow [2023-09-01 12:01:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:01:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:01:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5690 transitions. [2023-09-01 12:01:17,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912804291019117 [2023-09-01 12:01:17,578 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5690 transitions. [2023-09-01 12:01:17,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5690 transitions. [2023-09-01 12:01:17,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:17,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5690 transitions. [2023-09-01 12:01:17,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 258.6363636363636) internal successors, (5690), 22 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:17,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:17,591 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:17,591 INFO L175 Difference]: Start difference. First operand has 236 places, 715 transitions, 12682 flow. Second operand 22 states and 5690 transitions. [2023-09-01 12:01:17,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 911 transitions, 16645 flow [2023-09-01 12:01:20,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 911 transitions, 16144 flow, removed 88 selfloop flow, removed 8 redundant places. [2023-09-01 12:01:20,231 INFO L231 Difference]: Finished difference. Result has 251 places, 719 transitions, 13282 flow [2023-09-01 12:01:20,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12213, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13282, PETRI_PLACES=251, PETRI_TRANSITIONS=719} [2023-09-01 12:01:20,232 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 217 predicate places. [2023-09-01 12:01:20,232 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 719 transitions, 13282 flow [2023-09-01 12:01:20,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:20,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:20,233 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:20,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 12:01:20,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:20,434 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:01:20,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1373405120, now seen corresponding path program 7 times [2023-09-01 12:01:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312632980] [2023-09-01 12:01:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:20,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-09-01 12:01:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312632980] [2023-09-01 12:01:21,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312632980] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:21,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045387825] [2023-09-01 12:01:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:01:21,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:21,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:21,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:21,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:01:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:22,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:01:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:22,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:22,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:01:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:22,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:23,037 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:01:23,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:01:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045387825] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:23,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:23,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 10] total 40 [2023-09-01 12:01:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131168974] [2023-09-01 12:01:23,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 12:01:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 12:01:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 12:01:26,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-09-01 12:01:26,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 719 transitions, 13282 flow. Second operand has 41 states, 41 states have (on average 237.0487804878049) internal successors, (9719), 41 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:26,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:26,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-09-01 12:01:26,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:32,289 INFO L130 PetriNetUnfolder]: 11399/16498 cut-off events. [2023-09-01 12:01:32,289 INFO L131 PetriNetUnfolder]: For 336682/336682 co-relation queries the response was YES. [2023-09-01 12:01:32,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140447 conditions, 16498 events. 11399/16498 cut-off events. For 336682/336682 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 97772 event pairs, 2738 based on Foata normal form. 2/16500 useless extension candidates. Maximal degree in co-relation 140265. Up to 7500 conditions per place. [2023-09-01 12:01:32,416 INFO L137 encePairwiseOnDemand]: 642/661 looper letters, 421 selfloop transitions, 457 changer transitions 11/889 dead transitions. [2023-09-01 12:01:32,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 889 transitions, 16963 flow [2023-09-01 12:01:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 12:01:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 12:01:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6080 transitions. [2023-09-01 12:01:32,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3679273827534039 [2023-09-01 12:01:32,424 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6080 transitions. [2023-09-01 12:01:32,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6080 transitions. [2023-09-01 12:01:32,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:32,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6080 transitions. [2023-09-01 12:01:32,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 243.2) internal successors, (6080), 25 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 661.0) internal successors, (17186), 26 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,444 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 661.0) internal successors, (17186), 26 states have internal predecessors, (17186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:32,444 INFO L175 Difference]: Start difference. First operand has 251 places, 719 transitions, 13282 flow. Second operand 25 states and 6080 transitions. [2023-09-01 12:01:32,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 889 transitions, 16963 flow [2023-09-01 12:01:34,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 889 transitions, 16035 flow, removed 48 selfloop flow, removed 16 redundant places. [2023-09-01 12:01:34,931 INFO L231 Difference]: Finished difference. Result has 261 places, 725 transitions, 13504 flow [2023-09-01 12:01:34,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12392, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13504, PETRI_PLACES=261, PETRI_TRANSITIONS=725} [2023-09-01 12:01:34,932 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 227 predicate places. [2023-09-01 12:01:34,932 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 725 transitions, 13504 flow [2023-09-01 12:01:34,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 237.0487804878049) internal successors, (9719), 41 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:34,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:34,933 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:34,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:35,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:01:35,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2083753392, now seen corresponding path program 8 times [2023-09-01 12:01:35,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:35,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310542968] [2023-09-01 12:01:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:35,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310542968] [2023-09-01 12:01:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310542968] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610778730] [2023-09-01 12:01:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:01:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:36,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:36,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:01:36,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:01:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:01:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:36,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:36,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:01:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:36,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:37,130 INFO L321 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-09-01 12:01:37,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2023-09-01 12:01:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:43,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610778730] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:43,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:43,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-09-01 12:01:43,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620096734] [2023-09-01 12:01:43,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:01:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:43,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:01:43,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:01:45,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:01:45,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 725 transitions, 13504 flow. Second operand has 31 states, 31 states have (on average 250.16129032258064) internal successors, (7755), 31 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:45,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:45,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:01:45,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:52,158 INFO L130 PetriNetUnfolder]: 15008/21628 cut-off events. [2023-09-01 12:01:52,158 INFO L131 PetriNetUnfolder]: For 474583/474583 co-relation queries the response was YES. [2023-09-01 12:01:52,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186612 conditions, 21628 events. 15008/21628 cut-off events. For 474583/474583 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 132315 event pairs, 2346 based on Foata normal form. 1/21629 useless extension candidates. Maximal degree in co-relation 186418. Up to 10523 conditions per place. [2023-09-01 12:01:52,661 INFO L137 encePairwiseOnDemand]: 649/661 looper letters, 442 selfloop transitions, 604 changer transitions 125/1171 dead transitions. [2023-09-01 12:01:52,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1171 transitions, 21989 flow [2023-09-01 12:01:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 12:01:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 12:01:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7227 transitions. [2023-09-01 12:01:52,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904797925221526 [2023-09-01 12:01:52,671 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7227 transitions. [2023-09-01 12:01:52,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7227 transitions. [2023-09-01 12:01:52,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:52,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7227 transitions. [2023-09-01 12:01:52,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 258.10714285714283) internal successors, (7227), 28 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,695 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 661.0) internal successors, (19169), 29 states have internal predecessors, (19169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:52,695 INFO L175 Difference]: Start difference. First operand has 261 places, 725 transitions, 13504 flow. Second operand 28 states and 7227 transitions. [2023-09-01 12:01:52,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1171 transitions, 21989 flow [2023-09-01 12:01:56,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1171 transitions, 21033 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-09-01 12:01:56,618 INFO L231 Difference]: Finished difference. Result has 289 places, 866 transitions, 17235 flow [2023-09-01 12:01:56,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=12674, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17235, PETRI_PLACES=289, PETRI_TRANSITIONS=866} [2023-09-01 12:01:56,619 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 255 predicate places. [2023-09-01 12:01:56,619 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 866 transitions, 17235 flow [2023-09-01 12:01:56,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.16129032258064) internal successors, (7755), 31 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:56,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:56,619 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:56,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:56,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-09-01 12:01:56,820 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:01:56,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1152200182, now seen corresponding path program 9 times [2023-09-01 12:01:56,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551453871] [2023-09-01 12:01:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:57,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:57,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551453871] [2023-09-01 12:01:57,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551453871] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:57,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643626171] [2023-09-01 12:01:57,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:01:57,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:57,659 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:01:57,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:01:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:57,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:01:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:58,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:58,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:01:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:58,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:58,530 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:01:58,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:01:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:01:58,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643626171] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:58,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:58,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 29 [2023-09-01 12:01:58,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859011480] [2023-09-01 12:01:58,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:58,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:01:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:01:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:02:00,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:02:00,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 866 transitions, 17235 flow. Second operand has 30 states, 30 states have (on average 250.33333333333334) internal successors, (7510), 30 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:00,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:00,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:02:00,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:07,048 INFO L130 PetriNetUnfolder]: 13257/19159 cut-off events. [2023-09-01 12:02:07,048 INFO L131 PetriNetUnfolder]: For 715015/715015 co-relation queries the response was YES. [2023-09-01 12:02:07,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194977 conditions, 19159 events. 13257/19159 cut-off events. For 715015/715015 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 116389 event pairs, 2427 based on Foata normal form. 1/19160 useless extension candidates. Maximal degree in co-relation 194780. Up to 7040 conditions per place. [2023-09-01 12:02:07,230 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 510 selfloop transitions, 558 changer transitions 39/1107 dead transitions. [2023-09-01 12:02:07,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1107 transitions, 22947 flow [2023-09-01 12:02:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:02:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:02:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5937 transitions. [2023-09-01 12:02:07,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3905150299283036 [2023-09-01 12:02:07,234 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5937 transitions. [2023-09-01 12:02:07,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5937 transitions. [2023-09-01 12:02:07,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:07,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5937 transitions. [2023-09-01 12:02:07,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 258.1304347826087) internal successors, (5937), 23 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:07,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:07,246 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:07,246 INFO L175 Difference]: Start difference. First operand has 289 places, 866 transitions, 17235 flow. Second operand 23 states and 5937 transitions. [2023-09-01 12:02:07,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1107 transitions, 22947 flow [2023-09-01 12:02:13,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1107 transitions, 21907 flow, removed 336 selfloop flow, removed 6 redundant places. [2023-09-01 12:02:13,881 INFO L231 Difference]: Finished difference. Result has 311 places, 885 transitions, 18054 flow [2023-09-01 12:02:13,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=16322, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18054, PETRI_PLACES=311, PETRI_TRANSITIONS=885} [2023-09-01 12:02:13,882 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 277 predicate places. [2023-09-01 12:02:13,882 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 885 transitions, 18054 flow [2023-09-01 12:02:13,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 250.33333333333334) internal successors, (7510), 30 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:13,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:13,883 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:13,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:14,084 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:02:14,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash -200624508, now seen corresponding path program 10 times [2023-09-01 12:02:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:14,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301195381] [2023-09-01 12:02:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:14,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:14,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301195381] [2023-09-01 12:02:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301195381] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:14,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73196587] [2023-09-01 12:02:14,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:02:14,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:14,816 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:14,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:02:15,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:02:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:02:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:15,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:15,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:02:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:15,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:15,659 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:02:15,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:02:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:15,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73196587] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:15,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:15,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-09-01 12:02:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965270625] [2023-09-01 12:02:15,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:15,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 12:02:15,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 12:02:15,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-09-01 12:02:18,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:02:18,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 885 transitions, 18054 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:18,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:18,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:02:18,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:24,225 INFO L130 PetriNetUnfolder]: 13067/18881 cut-off events. [2023-09-01 12:02:24,226 INFO L131 PetriNetUnfolder]: For 780868/780868 co-relation queries the response was YES. [2023-09-01 12:02:24,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194700 conditions, 18881 events. 13067/18881 cut-off events. For 780868/780868 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 114040 event pairs, 2598 based on Foata normal form. 1/18882 useless extension candidates. Maximal degree in co-relation 194496. Up to 7258 conditions per place. [2023-09-01 12:02:24,431 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 527 selfloop transitions, 547 changer transitions 1/1075 dead transitions. [2023-09-01 12:02:24,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1075 transitions, 22536 flow [2023-09-01 12:02:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:02:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:02:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5677 transitions. [2023-09-01 12:02:24,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39038646678586164 [2023-09-01 12:02:24,435 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5677 transitions. [2023-09-01 12:02:24,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5677 transitions. [2023-09-01 12:02:24,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:24,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5677 transitions. [2023-09-01 12:02:24,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 258.04545454545456) internal successors, (5677), 22 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:24,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:24,446 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:24,446 INFO L175 Difference]: Start difference. First operand has 311 places, 885 transitions, 18054 flow. Second operand 22 states and 5677 transitions. [2023-09-01 12:02:24,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1075 transitions, 22536 flow [2023-09-01 12:02:30,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1075 transitions, 21393 flow, removed 96 selfloop flow, removed 15 redundant places. [2023-09-01 12:02:30,156 INFO L231 Difference]: Finished difference. Result has 317 places, 889 transitions, 18139 flow [2023-09-01 12:02:30,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=16938, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18139, PETRI_PLACES=317, PETRI_TRANSITIONS=889} [2023-09-01 12:02:30,157 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 283 predicate places. [2023-09-01 12:02:30,157 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 889 transitions, 18139 flow [2023-09-01 12:02:30,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:30,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:30,158 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:30,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:30,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:30,358 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:02:30,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash 512198078, now seen corresponding path program 11 times [2023-09-01 12:02:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113034354] [2023-09-01 12:02:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:31,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:31,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113034354] [2023-09-01 12:02:31,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113034354] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:31,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994968603] [2023-09-01 12:02:31,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:02:31,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:31,048 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:31,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:02:31,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:02:31,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:02:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:31,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:31,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:02:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:31,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:31,991 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:02:31,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:02:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994968603] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:32,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:32,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-09-01 12:02:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636173539] [2023-09-01 12:02:32,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:02:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:02:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:02:34,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:02:34,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 889 transitions, 18139 flow. Second operand has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:34,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:34,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:02:34,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:41,292 INFO L130 PetriNetUnfolder]: 13611/19666 cut-off events. [2023-09-01 12:02:41,293 INFO L131 PetriNetUnfolder]: For 824202/824202 co-relation queries the response was YES. [2023-09-01 12:02:41,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203844 conditions, 19666 events. 13611/19666 cut-off events. For 824202/824202 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 119346 event pairs, 1960 based on Foata normal form. 1/19667 useless extension candidates. Maximal degree in co-relation 203639. Up to 6668 conditions per place. [2023-09-01 12:02:41,535 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 506 selfloop transitions, 638 changer transitions 31/1175 dead transitions. [2023-09-01 12:02:41,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1175 transitions, 24593 flow [2023-09-01 12:02:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 12:02:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 12:02:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8250 transitions. [2023-09-01 12:02:41,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900340393343419 [2023-09-01 12:02:41,542 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8250 transitions. [2023-09-01 12:02:41,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8250 transitions. [2023-09-01 12:02:41,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:41,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8250 transitions. [2023-09-01 12:02:41,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 257.8125) internal successors, (8250), 32 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:41,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 661.0) internal successors, (21813), 33 states have internal predecessors, (21813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:41,558 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 661.0) internal successors, (21813), 33 states have internal predecessors, (21813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:41,558 INFO L175 Difference]: Start difference. First operand has 317 places, 889 transitions, 18139 flow. Second operand 32 states and 8250 transitions. [2023-09-01 12:02:41,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1175 transitions, 24593 flow [2023-09-01 12:02:47,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1175 transitions, 23450 flow, removed 64 selfloop flow, removed 19 redundant places. [2023-09-01 12:02:47,335 INFO L231 Difference]: Finished difference. Result has 339 places, 918 transitions, 19231 flow [2023-09-01 12:02:47,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=17119, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19231, PETRI_PLACES=339, PETRI_TRANSITIONS=918} [2023-09-01 12:02:47,336 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 305 predicate places. [2023-09-01 12:02:47,336 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 918 transitions, 19231 flow [2023-09-01 12:02:47,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 250.2258064516129) internal successors, (7757), 31 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:47,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:47,337 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:47,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 12:02:47,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 12:02:47,543 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:02:47,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -940151146, now seen corresponding path program 12 times [2023-09-01 12:02:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:47,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484161911] [2023-09-01 12:02:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484161911] [2023-09-01 12:02:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484161911] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868160329] [2023-09-01 12:02:48,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:02:48,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:48,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:48,265 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:48,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:02:48,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:02:48,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:48,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 56 conjunts are in the unsatisfiable core [2023-09-01 12:02:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:48,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:48,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:02:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:48,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:49,445 INFO L321 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2023-09-01 12:02:49,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 100 [2023-09-01 12:02:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:02:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868160329] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:49,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-09-01 12:02:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937609047] [2023-09-01 12:02:49,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:02:49,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:02:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:02:51,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 661 [2023-09-01 12:02:51,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 918 transitions, 19231 flow. Second operand has 32 states, 32 states have (on average 247.21875) internal successors, (7911), 32 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:51,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:51,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 661 [2023-09-01 12:02:51,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:59,343 INFO L130 PetriNetUnfolder]: 13874/20059 cut-off events. [2023-09-01 12:02:59,343 INFO L131 PetriNetUnfolder]: For 982859/982859 co-relation queries the response was YES. [2023-09-01 12:02:59,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215977 conditions, 20059 events. 13874/20059 cut-off events. For 982859/982859 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 121907 event pairs, 2643 based on Foata normal form. 2/20061 useless extension candidates. Maximal degree in co-relation 215765. Up to 7046 conditions per place. [2023-09-01 12:02:59,575 INFO L137 encePairwiseOnDemand]: 644/661 looper letters, 569 selfloop transitions, 622 changer transitions 5/1196 dead transitions. [2023-09-01 12:02:59,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1196 transitions, 25309 flow [2023-09-01 12:02:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 12:02:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 12:02:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8413 transitions. [2023-09-01 12:02:59,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856874340989318 [2023-09-01 12:02:59,581 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8413 transitions. [2023-09-01 12:02:59,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8413 transitions. [2023-09-01 12:02:59,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:59,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8413 transitions. [2023-09-01 12:02:59,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 254.93939393939394) internal successors, (8413), 33 states have internal predecessors, (8413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:59,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 661.0) internal successors, (22474), 34 states have internal predecessors, (22474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:59,596 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 661.0) internal successors, (22474), 34 states have internal predecessors, (22474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:59,596 INFO L175 Difference]: Start difference. First operand has 339 places, 918 transitions, 19231 flow. Second operand 33 states and 8413 transitions. [2023-09-01 12:02:59,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1196 transitions, 25309 flow [2023-09-01 12:03:06,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1196 transitions, 24269 flow, removed 136 selfloop flow, removed 20 redundant places. [2023-09-01 12:03:06,349 INFO L231 Difference]: Finished difference. Result has 358 places, 961 transitions, 20837 flow [2023-09-01 12:03:06,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=18255, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=20837, PETRI_PLACES=358, PETRI_TRANSITIONS=961} [2023-09-01 12:03:06,350 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2023-09-01 12:03:06,351 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 961 transitions, 20837 flow [2023-09-01 12:03:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 247.21875) internal successors, (7911), 32 states have internal predecessors, (7911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:06,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:06,352 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:06,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 12:03:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:06,558 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:03:06,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1811565466, now seen corresponding path program 13 times [2023-09-01 12:03:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065841902] [2023-09-01 12:03:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:07,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065841902] [2023-09-01 12:03:07,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065841902] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85552760] [2023-09-01 12:03:07,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:03:07,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:07,225 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:07,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 12:03:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:03:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:07,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:07,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:03:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:07,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:08,070 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:03:08,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:03:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:08,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85552760] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:08,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:08,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-09-01 12:03:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870493658] [2023-09-01 12:03:08,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:08,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 12:03:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 12:03:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-09-01 12:03:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:03:09,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 961 transitions, 20837 flow. Second operand has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:09,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:09,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:03:09,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:17,080 INFO L130 PetriNetUnfolder]: 13874/20058 cut-off events. [2023-09-01 12:03:17,080 INFO L131 PetriNetUnfolder]: For 1013832/1013832 co-relation queries the response was YES. [2023-09-01 12:03:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222470 conditions, 20058 events. 13874/20058 cut-off events. For 1013832/1013832 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 121902 event pairs, 3012 based on Foata normal form. 1/20059 useless extension candidates. Maximal degree in co-relation 222255. Up to 7624 conditions per place. [2023-09-01 12:03:17,306 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 579 selfloop transitions, 530 changer transitions 1/1110 dead transitions. [2023-09-01 12:03:17,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1110 transitions, 24921 flow [2023-09-01 12:03:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:03:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:03:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4650 transitions. [2023-09-01 12:03:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908219868885527 [2023-09-01 12:03:17,310 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4650 transitions. [2023-09-01 12:03:17,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4650 transitions. [2023-09-01 12:03:17,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:17,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4650 transitions. [2023-09-01 12:03:17,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 258.3333333333333) internal successors, (4650), 18 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:17,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 661.0) internal successors, (12559), 19 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:17,318 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 661.0) internal successors, (12559), 19 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:17,318 INFO L175 Difference]: Start difference. First operand has 358 places, 961 transitions, 20837 flow. Second operand 18 states and 4650 transitions. [2023-09-01 12:03:17,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1110 transitions, 24921 flow [2023-09-01 12:03:25,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1110 transitions, 23980 flow, removed 190 selfloop flow, removed 15 redundant places. [2023-09-01 12:03:25,154 INFO L231 Difference]: Finished difference. Result has 361 places, 963 transitions, 21037 flow [2023-09-01 12:03:25,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=19896, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21037, PETRI_PLACES=361, PETRI_TRANSITIONS=963} [2023-09-01 12:03:25,154 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 327 predicate places. [2023-09-01 12:03:25,155 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 963 transitions, 21037 flow [2023-09-01 12:03:25,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 250.24137931034483) internal successors, (7257), 29 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:25,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:25,155 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:25,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:25,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:25,356 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:03:25,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 320772784, now seen corresponding path program 14 times [2023-09-01 12:03:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:25,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806416203] [2023-09-01 12:03:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:25,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806416203] [2023-09-01 12:03:26,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806416203] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402017453] [2023-09-01 12:03:26,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:03:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:26,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:26,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 12:03:26,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:03:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 12:03:26,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:26,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:26,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-09-01 12:03:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:26,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:27,182 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:03:27,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:03:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402017453] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:27,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:27,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 35 [2023-09-01 12:03:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081063253] [2023-09-01 12:03:27,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:27,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 12:03:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 12:03:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-09-01 12:03:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:03:30,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 963 transitions, 21037 flow. Second operand has 36 states, 36 states have (on average 250.11111111111111) internal successors, (9004), 36 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:30,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:30,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:03:30,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:38,706 INFO L130 PetriNetUnfolder]: 15561/22588 cut-off events. [2023-09-01 12:03:38,706 INFO L131 PetriNetUnfolder]: For 1168704/1168704 co-relation queries the response was YES. [2023-09-01 12:03:38,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252656 conditions, 22588 events. 15561/22588 cut-off events. For 1168704/1168704 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 140884 event pairs, 3718 based on Foata normal form. 2/22590 useless extension candidates. Maximal degree in co-relation 252440. Up to 15738 conditions per place. [2023-09-01 12:03:39,082 INFO L137 encePairwiseOnDemand]: 645/661 looper letters, 668 selfloop transitions, 583 changer transitions 2/1253 dead transitions. [2023-09-01 12:03:39,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1253 transitions, 29150 flow [2023-09-01 12:03:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 12:03:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 12:03:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 6948 transitions. [2023-09-01 12:03:39,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38930912758446795 [2023-09-01 12:03:39,087 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 6948 transitions. [2023-09-01 12:03:39,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 6948 transitions. [2023-09-01 12:03:39,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:39,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 6948 transitions. [2023-09-01 12:03:39,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 257.3333333333333) internal successors, (6948), 27 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:39,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 661.0) internal successors, (18508), 28 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:39,104 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 661.0) internal successors, (18508), 28 states have internal predecessors, (18508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:39,104 INFO L175 Difference]: Start difference. First operand has 361 places, 963 transitions, 21037 flow. Second operand 27 states and 6948 transitions. [2023-09-01 12:03:39,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1253 transitions, 29150 flow [2023-09-01 12:03:47,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1253 transitions, 27999 flow, removed 32 selfloop flow, removed 16 redundant places. [2023-09-01 12:03:47,156 INFO L231 Difference]: Finished difference. Result has 378 places, 1063 transitions, 24510 flow [2023-09-01 12:03:47,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=20035, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24510, PETRI_PLACES=378, PETRI_TRANSITIONS=1063} [2023-09-01 12:03:47,157 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 344 predicate places. [2023-09-01 12:03:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1063 transitions, 24510 flow [2023-09-01 12:03:47,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 250.11111111111111) internal successors, (9004), 36 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:47,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:47,158 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:47,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:47,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:47,361 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:03:47,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1905575500, now seen corresponding path program 15 times [2023-09-01 12:03:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:47,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340516673] [2023-09-01 12:03:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340516673] [2023-09-01 12:03:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340516673] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973883641] [2023-09-01 12:03:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:03:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:48,071 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:48,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 12:03:48,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:03:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:48,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:03:48,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:48,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:48,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:03:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:48,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:49,150 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:03:49,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:03:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:03:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973883641] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:49,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-09-01 12:03:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098721138] [2023-09-01 12:03:49,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 12:03:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 12:03:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 12:03:51,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:03:51,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1063 transitions, 24510 flow. Second operand has 33 states, 33 states have (on average 250.06060606060606) internal successors, (8252), 33 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:51,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:51,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:03:51,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:58,914 INFO L130 PetriNetUnfolder]: 15725/22834 cut-off events. [2023-09-01 12:03:58,914 INFO L131 PetriNetUnfolder]: For 1234863/1234863 co-relation queries the response was YES. [2023-09-01 12:03:59,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261881 conditions, 22834 events. 15725/22834 cut-off events. For 1234863/1234863 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 142611 event pairs, 3812 based on Foata normal form. 2/22836 useless extension candidates. Maximal degree in co-relation 261658. Up to 16860 conditions per place. [2023-09-01 12:03:59,195 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 596 selfloop transitions, 601 changer transitions 1/1198 dead transitions. [2023-09-01 12:03:59,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1198 transitions, 28864 flow [2023-09-01 12:03:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:03:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:03:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5649 transitions. [2023-09-01 12:03:59,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884610094897538 [2023-09-01 12:03:59,199 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5649 transitions. [2023-09-01 12:03:59,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5649 transitions. [2023-09-01 12:03:59,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:59,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5649 transitions. [2023-09-01 12:03:59,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 256.77272727272725) internal successors, (5649), 22 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:59,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:59,208 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 661.0) internal successors, (15203), 23 states have internal predecessors, (15203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:59,208 INFO L175 Difference]: Start difference. First operand has 378 places, 1063 transitions, 24510 flow. Second operand 22 states and 5649 transitions. [2023-09-01 12:03:59,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1198 transitions, 28864 flow [2023-09-01 12:04:08,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1198 transitions, 28231 flow, removed 146 selfloop flow, removed 13 redundant places. [2023-09-01 12:04:08,712 INFO L231 Difference]: Finished difference. Result has 387 places, 1070 transitions, 25367 flow [2023-09-01 12:04:08,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=23929, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25367, PETRI_PLACES=387, PETRI_TRANSITIONS=1070} [2023-09-01 12:04:08,713 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 353 predicate places. [2023-09-01 12:04:08,713 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1070 transitions, 25367 flow [2023-09-01 12:04:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 250.06060606060606) internal successors, (8252), 33 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:08,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:04:08,714 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:04:08,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:04:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 12:04:08,917 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:04:08,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:04:08,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1669845044, now seen corresponding path program 16 times [2023-09-01 12:04:08,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:04:08,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212646118] [2023-09-01 12:04:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:04:08,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:04:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:04:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 12:04:10,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:04:10,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212646118] [2023-09-01 12:04:10,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212646118] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:04:10,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944020708] [2023-09-01 12:04:10,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:04:10,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:04:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:04:10,603 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:04:10,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 12:04:10,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:04:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:04:10,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:04:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:04:11,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:04:11,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:04:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:04:11,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:04:11,825 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:04:11,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:04:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:04:12,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944020708] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:04:12,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:04:12,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 10] total 50 [2023-09-01 12:04:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387546736] [2023-09-01 12:04:12,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:04:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-09-01 12:04:12,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:04:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-09-01 12:04:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2307, Unknown=0, NotChecked=0, Total=2550 [2023-09-01 12:04:18,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 661 [2023-09-01 12:04:18,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1070 transitions, 25367 flow. Second operand has 51 states, 51 states have (on average 227.86274509803923) internal successors, (11621), 51 states have internal predecessors, (11621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:18,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:04:18,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 661 [2023-09-01 12:04:18,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:53,685 INFO L130 PetriNetUnfolder]: 63065/91624 cut-off events. [2023-09-01 12:04:53,685 INFO L131 PetriNetUnfolder]: For 5143640/5143640 co-relation queries the response was YES. [2023-09-01 12:04:55,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063758 conditions, 91624 events. 63065/91624 cut-off events. For 5143640/5143640 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 682428 event pairs, 16156 based on Foata normal form. 8/91632 useless extension candidates. Maximal degree in co-relation 1063480. Up to 19441 conditions per place. [2023-09-01 12:04:56,293 INFO L137 encePairwiseOnDemand]: 643/661 looper letters, 2463 selfloop transitions, 2233 changer transitions 4/4700 dead transitions. [2023-09-01 12:04:56,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 4700 transitions, 117214 flow [2023-09-01 12:04:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-09-01 12:04:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-09-01 12:04:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 16952 transitions. [2023-09-01 12:04:56,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35619431837283577 [2023-09-01 12:04:56,303 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 16952 transitions. [2023-09-01 12:04:56,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 16952 transitions. [2023-09-01 12:04:56,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:56,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 16952 transitions. [2023-09-01 12:04:56,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 235.44444444444446) internal successors, (16952), 72 states have internal predecessors, (16952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:56,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 661.0) internal successors, (48253), 73 states have internal predecessors, (48253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:56,340 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 661.0) internal successors, (48253), 73 states have internal predecessors, (48253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:56,341 INFO L175 Difference]: Start difference. First operand has 387 places, 1070 transitions, 25367 flow. Second operand 72 states and 16952 transitions. [2023-09-01 12:04:56,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 4700 transitions, 117214 flow [2023-09-01 12:07:07,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 4700 transitions, 114814 flow, removed 256 selfloop flow, removed 15 redundant places. [2023-09-01 12:07:07,392 INFO L231 Difference]: Finished difference. Result has 451 places, 2741 transitions, 77784 flow [2023-09-01 12:07:07,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=24772, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=77784, PETRI_PLACES=451, PETRI_TRANSITIONS=2741} [2023-09-01 12:07:07,393 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 417 predicate places. [2023-09-01 12:07:07,394 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 2741 transitions, 77784 flow [2023-09-01 12:07:07,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 227.86274509803923) internal successors, (11621), 51 states have internal predecessors, (11621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:07,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:07:07,395 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:07:07,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 12:07:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:07:07,596 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:07:07,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:07:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -341568430, now seen corresponding path program 17 times [2023-09-01 12:07:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:07:07,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16561883] [2023-09-01 12:07:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:07:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:07:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:07:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:07:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16561883] [2023-09-01 12:07:08,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16561883] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:07:08,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146801593] [2023-09-01 12:07:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:07:08,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:07:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:07:08,261 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:07:08,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 12:07:08,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:07:08,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:07:08,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:07:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:07:09,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:07:09,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-09-01 12:07:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:09,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:07:09,459 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:07:09,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:07:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:07:09,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146801593] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:07:09,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:07:09,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-09-01 12:07:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83304005] [2023-09-01 12:07:09,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:07:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 12:07:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:07:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 12:07:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-09-01 12:07:11,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 661 [2023-09-01 12:07:11,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2741 transitions, 77784 flow. Second operand has 32 states, 32 states have (on average 250.09375) internal successors, (8003), 32 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:11,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:07:11,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 661 [2023-09-01 12:07:11,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:07:54,647 INFO L130 PetriNetUnfolder]: 63061/91616 cut-off events. [2023-09-01 12:07:54,648 INFO L131 PetriNetUnfolder]: For 5097684/5097684 co-relation queries the response was YES. [2023-09-01 12:07:56,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067844 conditions, 91616 events. 63061/91616 cut-off events. For 5097684/5097684 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 681722 event pairs, 15774 based on Foata normal form. 8/91624 useless extension candidates. Maximal degree in co-relation 1067528. Up to 67344 conditions per place. [2023-09-01 12:07:57,578 INFO L137 encePairwiseOnDemand]: 647/661 looper letters, 626 selfloop transitions, 2244 changer transitions 1/2871 dead transitions. [2023-09-01 12:07:57,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 2871 transitions, 85266 flow [2023-09-01 12:07:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:07:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:07:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5899 transitions. [2023-09-01 12:07:57,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38801552325198974 [2023-09-01 12:07:57,582 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5899 transitions. [2023-09-01 12:07:57,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5899 transitions. [2023-09-01 12:07:57,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:07:57,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5899 transitions. [2023-09-01 12:07:57,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 256.4782608695652) internal successors, (5899), 23 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:57,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:57,591 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 661.0) internal successors, (15864), 24 states have internal predecessors, (15864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:07:57,592 INFO L175 Difference]: Start difference. First operand has 451 places, 2741 transitions, 77784 flow. Second operand 23 states and 5899 transitions. [2023-09-01 12:07:57,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 2871 transitions, 85266 flow [2023-09-01 12:10:08,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 2871 transitions, 84829 flow, removed 84 selfloop flow, removed 14 redundant places. [2023-09-01 12:10:08,488 INFO L231 Difference]: Finished difference. Result has 460 places, 2743 transitions, 81902 flow [2023-09-01 12:10:08,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=661, PETRI_DIFFERENCE_MINUEND_FLOW=77347, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=81902, PETRI_PLACES=460, PETRI_TRANSITIONS=2743} [2023-09-01 12:10:08,490 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 426 predicate places. [2023-09-01 12:10:08,490 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 2743 transitions, 81902 flow [2023-09-01 12:10:08,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 250.09375) internal successors, (8003), 32 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:10:08,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:10:08,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:10:08,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 12:10:08,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:10:08,691 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:10:08,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:10:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2096560594, now seen corresponding path program 18 times [2023-09-01 12:10:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:10:08,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301976843] [2023-09-01 12:10:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:10:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:10:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:10:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:10:09,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:10:09,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301976843] [2023-09-01 12:10:09,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301976843] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:10:09,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239677136] [2023-09-01 12:10:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:10:09,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:10:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:10:09,937 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:10:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 12:10:10,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:10:10,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:10:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 12:10:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:10:10,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:10:10,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-09-01 12:10:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:10:10,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:10:11,285 INFO L321 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-09-01 12:10:11,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-09-01 12:10:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-09-01 12:10:11,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239677136] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:10:11,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:10:11,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 45 [2023-09-01 12:10:11,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538797293] [2023-09-01 12:10:11,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:10:11,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 12:10:11,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:10:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 12:10:11,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2023-09-01 12:10:15,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 661 [2023-09-01 12:10:15,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 2743 transitions, 81902 flow. Second operand has 46 states, 46 states have (on average 236.97826086956522) internal successors, (10901), 46 states have internal predecessors, (10901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:10:15,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:10:15,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 661 [2023-09-01 12:10:15,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:11:02,002 INFO L130 PetriNetUnfolder]: 64477/93820 cut-off events. [2023-09-01 12:11:02,002 INFO L131 PetriNetUnfolder]: For 5372333/5372333 co-relation queries the response was YES. [2023-09-01 12:11:03,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111674 conditions, 93820 events. 64477/93820 cut-off events. For 5372333/5372333 co-relation queries the response was YES. Maximal size of possible extension queue 4385. Compared 702894 event pairs, 16894 based on Foata normal form. 20/93840 useless extension candidates. Maximal degree in co-relation 1107500. Up to 72288 conditions per place. [2023-09-01 12:11:04,604 INFO L137 encePairwiseOnDemand]: 641/661 looper letters, 709 selfloop transitions, 2187 changer transitions 3/2899 dead transitions. [2023-09-01 12:11:04,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 2899 transitions, 90251 flow [2023-09-01 12:11:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:11:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:11:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 6314 transitions. [2023-09-01 12:11:04,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673920633073432 [2023-09-01 12:11:04,607 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 6314 transitions. [2023-09-01 12:11:04,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 6314 transitions. [2023-09-01 12:11:04,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:11:04,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 6314 transitions. [2023-09-01 12:11:04,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 242.84615384615384) internal successors, (6314), 26 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:11:04,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 661.0) internal successors, (17847), 27 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:11:04,618 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 661.0) internal successors, (17847), 27 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:11:04,618 INFO L175 Difference]: Start difference. First operand has 460 places, 2743 transitions, 81902 flow. Second operand 26 states and 6314 transitions. [2023-09-01 12:11:04,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 2899 transitions, 90251 flow Killed by 15