./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-4.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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:09:01,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:09:01,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:09:01,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:09:01,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:09:01,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:09:01,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:09:01,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:09:01,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:09:01,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:09:01,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:09:01,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:09:01,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:09:01,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:09:01,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:09:01,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:09:01,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:09:01,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:09:01,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:09:01,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:09:01,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:09:01,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:09:01,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:09:01,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:09:01,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:09:01,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:09:01,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:09:01,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:09:01,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:09:01,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:09:01,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:09:01,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:09:01,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:09:01,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:09:01,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:09:01,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:09:01,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:09:01,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:09:01,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:09:01,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:09:01,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:09:01,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:09:01,610 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:09:01,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:09:01,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:09:01,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:09:01,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:09:01,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:09:01,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:09:01,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:09:01,613 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:09:01,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:09:01,614 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:09:01,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:09:01,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:09:01,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:09:01,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:09:01,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:09:01,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:09:01,615 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:09:01,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:09:01,617 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:09:01,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:09:01,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:09:01,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:09:01,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:09:01,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:09:01,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:09:01,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:09:01,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:09:01,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:09:01,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:09:01,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:09:01,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:09:01,624 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:09:01,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:09:01,625 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:09:01,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:09:01,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:09:01,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:09:01,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:09:01,927 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:09:01,927 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:09:01,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-31 04:09:03,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:09:03,289 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:09:03,290 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-4.wvr.c [2023-08-31 04:09:03,297 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5290f1bba/58faa6efcd05479ba75022a6596bed56/FLAGa41884b62 [2023-08-31 04:09:03,309 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5290f1bba/58faa6efcd05479ba75022a6596bed56 [2023-08-31 04:09:03,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:09:03,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:09:03,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:09:03,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:09:03,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:09:03,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7711c9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03, skipping insertion in model container [2023-08-31 04:09:03,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:09:03,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:09:03,490 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/unroll-4.wvr.c[2572,2585] [2023-08-31 04:09:03,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:09:03,515 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:09:03,540 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/unroll-4.wvr.c[2572,2585] [2023-08-31 04:09:03,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:09:03,562 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:09:03,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03 WrapperNode [2023-08-31 04:09:03,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:09:03,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:09:03,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:09:03,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:09:03,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,621 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 157 [2023-08-31 04:09:03,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:09:03,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:09:03,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:09:03,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:09:03,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,649 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:09:03,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:09:03,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:09:03,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:09:03,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (1/1) ... [2023-08-31 04:09:03,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:09:03,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:03,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 04:09:03,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 04:09:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:09:03,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:09:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:09:03,740 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:09:03,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:09:03,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:09:03,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:09:03,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:09:03,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:09:03,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:09:03,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:09:03,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:09:03,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:09:03,744 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:09:03,857 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:09:03,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:09:04,214 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:09:04,222 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:09:04,223 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:09:04,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:09:04 BoogieIcfgContainer [2023-08-31 04:09:04,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:09:04,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:09:04,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:09:04,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:09:04,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:09:03" (1/3) ... [2023-08-31 04:09:04,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2f50e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:09:04, skipping insertion in model container [2023-08-31 04:09:04,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:09:03" (2/3) ... [2023-08-31 04:09:04,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2f50e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:09:04, skipping insertion in model container [2023-08-31 04:09:04,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:09:04" (3/3) ... [2023-08-31 04:09:04,232 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-08-31 04:09:04,239 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:09:04,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:09:04,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:09:04,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:09:04,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:09:04,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 183 transitions, 382 flow [2023-08-31 04:09:04,533 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2023-08-31 04:09:04,533 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:09:04,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 181 events. 16/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 163 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-31 04:09:04,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 183 transitions, 382 flow [2023-08-31 04:09:04,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 173 transitions, 358 flow [2023-08-31 04:09:04,552 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:09:04,572 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 173 transitions, 358 flow [2023-08-31 04:09:04,578 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 173 transitions, 358 flow [2023-08-31 04:09:04,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 173 transitions, 358 flow [2023-08-31 04:09:04,609 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2023-08-31 04:09:04,609 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:09:04,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 173 events. 16/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 144 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-31 04:09:04,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 3242 [2023-08-31 04:09:09,503 INFO L134 LiptonReduction]: Checked pairs total: 3238 [2023-08-31 04:09:09,504 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-31 04:09:09,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:09:09,534 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;@19b31efc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:09:09,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:09:09,547 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 04:09:09,547 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:09:09,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:09,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:09,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:09,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash 924236132, now seen corresponding path program 1 times [2023-08-31 04:09:09,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628836759] [2023-08-31 04:09:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:09,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:09:09,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:09,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628836759] [2023-08-31 04:09:09,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628836759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:09:09,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:09:09,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:09:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808467741] [2023-08-31 04:09:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:09:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:09:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:09:10,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 393 [2023-08-31 04:09:10,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:10,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 393 [2023-08-31 04:09:10,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:10,092 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-31 04:09:10,092 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:09:10,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 189 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-31 04:09:10,094 INFO L137 encePairwiseOnDemand]: 390/393 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 04:09:10,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-31 04:09:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:09:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:09:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-31 04:09:10,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408821034775235 [2023-08-31 04:09:10,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-31 04:09:10,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-31 04:09:10,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:10,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-31 04:09:10,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,130 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 500 transitions. [2023-08-31 04:09:10,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-31 04:09:10,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 04:09:10,135 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 04:09:10,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-31 04:09:10,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 04:09:10,139 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 04:09:10,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:10,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:10,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:09:10,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:10,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1656557720, now seen corresponding path program 1 times [2023-08-31 04:09:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:10,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581489813] [2023-08-31 04:09:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:10,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:10,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581489813] [2023-08-31 04:09:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581489813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:09:10,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:09:10,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 04:09:10,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526129874] [2023-08-31 04:09:10,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:09:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:09:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:09:10,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-08-31 04:09:10,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:10,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-08-31 04:09:10,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:10,419 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-08-31 04:09:10,420 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:09:10,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 317 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-31 04:09:10,421 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-31 04:09:10,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-31 04:09:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:09:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:09:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-31 04:09:10,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408821034775235 [2023-08-31 04:09:10,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-31 04:09:10,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-31 04:09:10,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:10,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-31 04:09:10,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,436 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 500 transitions. [2023-08-31 04:09:10,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-31 04:09:10,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 04:09:10,438 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-31 04:09:10,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-31 04:09:10,439 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-31 04:09:10,439 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-31 04:09:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:10,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:10,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:09:10,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:10,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1844840923, now seen corresponding path program 1 times [2023-08-31 04:09:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892413591] [2023-08-31 04:09:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:10,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:10,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892413591] [2023-08-31 04:09:10,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892413591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:09:10,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:09:10,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 04:09:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118370657] [2023-08-31 04:09:10,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:10,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:09:10,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:10,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:09:10,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:09:10,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-08-31 04:09:10,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:10,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-08-31 04:09:10,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:10,702 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2023-08-31 04:09:10,702 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-08-31 04:09:10,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 74/143 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 469 event pairs, 15 based on Foata normal form. 8/150 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2023-08-31 04:09:10,704 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2023-08-31 04:09:10,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 180 flow [2023-08-31 04:09:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:09:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:09:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-08-31 04:09:10,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-08-31 04:09:10,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-08-31 04:09:10,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-08-31 04:09:10,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:10,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-08-31 04:09:10,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,712 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,713 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 4 states and 664 transitions. [2023-08-31 04:09:10,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 180 flow [2023-08-31 04:09:10,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:09:10,714 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 89 flow [2023-08-31 04:09:10,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-31 04:09:10,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-31 04:09:10,715 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 89 flow [2023-08-31 04:09:10,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:10,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:10,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:09:10,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:10,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:10,717 INFO L85 PathProgramCache]: Analyzing trace with hash -338318067, now seen corresponding path program 1 times [2023-08-31 04:09:10,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:10,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214458170] [2023-08-31 04:09:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:10,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214458170] [2023-08-31 04:09:10,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214458170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:09:10,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:09:10,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:09:10,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573143376] [2023-08-31 04:09:10,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:10,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:09:10,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:09:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:09:10,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-31 04:09:10,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:10,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:10,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-31 04:09:10,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:10,982 INFO L130 PetriNetUnfolder]: 93/182 cut-off events. [2023-08-31 04:09:10,982 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2023-08-31 04:09:10,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 182 events. 93/182 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 615 event pairs, 26 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 506. Up to 89 conditions per place. [2023-08-31 04:09:10,988 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 31 selfloop transitions, 7 changer transitions 11/49 dead transitions. [2023-08-31 04:09:10,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 274 flow [2023-08-31 04:09:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:09:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:09:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 958 transitions. [2023-08-31 04:09:10,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40627650551314676 [2023-08-31 04:09:10,993 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 958 transitions. [2023-08-31 04:09:10,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 958 transitions. [2023-08-31 04:09:10,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:10,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 958 transitions. [2023-08-31 04:09:11,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.66666666666666) internal successors, (958), 6 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,005 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 393.0) internal successors, (2751), 7 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,006 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 89 flow. Second operand 6 states and 958 transitions. [2023-08-31 04:09:11,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 274 flow [2023-08-31 04:09:11,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 264 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 04:09:11,011 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 126 flow [2023-08-31 04:09:11,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-31 04:09:11,013 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2023-08-31 04:09:11,013 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 126 flow [2023-08-31 04:09:11,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:11,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:11,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 04:09:11,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:11,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1252150367, now seen corresponding path program 2 times [2023-08-31 04:09:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406448436] [2023-08-31 04:09:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:11,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406448436] [2023-08-31 04:09:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406448436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725075733] [2023-08-31 04:09:11,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:09:11,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:11,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:11,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:11,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:09:11,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:09:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:09:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:09:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:11,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:11,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725075733] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 04:09:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2023-08-31 04:09:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004987325] [2023-08-31 04:09:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:09:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:09:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-31 04:09:11,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 393 [2023-08-31 04:09:11,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:11,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 393 [2023-08-31 04:09:11,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:11,546 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-08-31 04:09:11,549 INFO L131 PetriNetUnfolder]: For 248/261 co-relation queries the response was YES. [2023-08-31 04:09:11,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 163 events. 85/163 cut-off events. For 248/261 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 501 event pairs, 16 based on Foata normal form. 19/179 useless extension candidates. Maximal degree in co-relation 561. Up to 106 conditions per place. [2023-08-31 04:09:11,550 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-31 04:09:11,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 262 flow [2023-08-31 04:09:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:09:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:09:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2023-08-31 04:09:11,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41603053435114506 [2023-08-31 04:09:11,554 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2023-08-31 04:09:11,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2023-08-31 04:09:11,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:11,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2023-08-31 04:09:11,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,561 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 126 flow. Second operand 4 states and 654 transitions. [2023-08-31 04:09:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 262 flow [2023-08-31 04:09:11,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 04:09:11,565 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 151 flow [2023-08-31 04:09:11,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-31 04:09:11,568 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-31 04:09:11,568 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 151 flow [2023-08-31 04:09:11,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:11,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:11,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:11,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 04:09:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:11,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:11,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash 906879297, now seen corresponding path program 3 times [2023-08-31 04:09:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:11,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395610909] [2023-08-31 04:09:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:11,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:11,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395610909] [2023-08-31 04:09:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395610909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:09:11,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:09:11,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:09:11,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387015829] [2023-08-31 04:09:11,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:11,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:09:11,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:11,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:09:11,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:09:11,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 393 [2023-08-31 04:09:12,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:12,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 393 [2023-08-31 04:09:12,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:12,109 INFO L130 PetriNetUnfolder]: 102/207 cut-off events. [2023-08-31 04:09:12,110 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-08-31 04:09:12,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 207 events. 102/207 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 714 event pairs, 36 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 737. Up to 129 conditions per place. [2023-08-31 04:09:12,112 INFO L137 encePairwiseOnDemand]: 388/393 looper letters, 34 selfloop transitions, 8 changer transitions 8/50 dead transitions. [2023-08-31 04:09:12,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 355 flow [2023-08-31 04:09:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:09:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:09:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-08-31 04:09:12,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40916030534351144 [2023-08-31 04:09:12,115 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-08-31 04:09:12,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-08-31 04:09:12,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:12,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-08-31 04:09:12,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,125 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 393.0) internal successors, (2358), 6 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,125 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 151 flow. Second operand 5 states and 804 transitions. [2023-08-31 04:09:12,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 355 flow [2023-08-31 04:09:12,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 04:09:12,130 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 194 flow [2023-08-31 04:09:12,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2023-08-31 04:09:12,134 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-31 04:09:12,134 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 194 flow [2023-08-31 04:09:12,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:12,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 04:09:12,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:12,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1096563895, now seen corresponding path program 2 times [2023-08-31 04:09:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:12,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147108685] [2023-08-31 04:09:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:12,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:12,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:12,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147108685] [2023-08-31 04:09:12,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147108685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:09:12,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:09:12,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 04:09:12,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054263709] [2023-08-31 04:09:12,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:09:12,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:09:12,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:09:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:09:12,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 393 [2023-08-31 04:09:12,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:12,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 393 [2023-08-31 04:09:12,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:12,352 INFO L130 PetriNetUnfolder]: 96/192 cut-off events. [2023-08-31 04:09:12,352 INFO L131 PetriNetUnfolder]: For 597/607 co-relation queries the response was YES. [2023-08-31 04:09:12,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 192 events. 96/192 cut-off events. For 597/607 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 31 based on Foata normal form. 13/199 useless extension candidates. Maximal degree in co-relation 800. Up to 130 conditions per place. [2023-08-31 04:09:12,354 INFO L137 encePairwiseOnDemand]: 389/393 looper letters, 28 selfloop transitions, 6 changer transitions 5/42 dead transitions. [2023-08-31 04:09:12,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 338 flow [2023-08-31 04:09:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:09:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:09:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2023-08-31 04:09:12,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223918575063613 [2023-08-31 04:09:12,356 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2023-08-31 04:09:12,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2023-08-31 04:09:12,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:12,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2023-08-31 04:09:12,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,361 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,361 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 194 flow. Second operand 4 states and 664 transitions. [2023-08-31 04:09:12,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 338 flow [2023-08-31 04:09:12,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 313 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-31 04:09:12,365 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 213 flow [2023-08-31 04:09:12,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-31 04:09:12,365 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-31 04:09:12,365 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 213 flow [2023-08-31 04:09:12,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:12,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:12,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 04:09:12,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:12,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1118128293, now seen corresponding path program 4 times [2023-08-31 04:09:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:12,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193316082] [2023-08-31 04:09:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:12,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:12,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193316082] [2023-08-31 04:09:12,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193316082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276336133] [2023-08-31 04:09:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:09:12,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:12,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:12,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:12,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:09:12,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:09:12,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:09:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:09:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:12,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276336133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:12,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:12,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-31 04:09:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832160104] [2023-08-31 04:09:12,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:12,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 04:09:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 04:09:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-31 04:09:12,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-31 04:09:12,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 154.8) internal successors, (1548), 10 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:12,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:12,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-31 04:09:12,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:13,014 INFO L130 PetriNetUnfolder]: 125/231 cut-off events. [2023-08-31 04:09:13,015 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2023-08-31 04:09:13,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 231 events. 125/231 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 767 event pairs, 20 based on Foata normal form. 24/254 useless extension candidates. Maximal degree in co-relation 956. Up to 92 conditions per place. [2023-08-31 04:09:13,017 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 39 selfloop transitions, 25 changer transitions 9/73 dead transitions. [2023-08-31 04:09:13,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 582 flow [2023-08-31 04:09:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 04:09:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 04:09:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1436 transitions. [2023-08-31 04:09:13,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059937800395816 [2023-08-31 04:09:13,021 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1436 transitions. [2023-08-31 04:09:13,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1436 transitions. [2023-08-31 04:09:13,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:13,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1436 transitions. [2023-08-31 04:09:13,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.55555555555554) internal successors, (1436), 9 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:13,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:13,030 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 393.0) internal successors, (3930), 10 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:13,030 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 213 flow. Second operand 9 states and 1436 transitions. [2023-08-31 04:09:13,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 582 flow [2023-08-31 04:09:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 560 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 04:09:13,034 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 373 flow [2023-08-31 04:09:13,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-08-31 04:09:13,035 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-08-31 04:09:13,035 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 373 flow [2023-08-31 04:09:13,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.8) internal successors, (1548), 10 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:13,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:13,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:13,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-31 04:09:13,241 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,SelfDestructingSolverStorable7 [2023-08-31 04:09:13,242 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:13,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:13,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1249714855, now seen corresponding path program 1 times [2023-08-31 04:09:13,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:13,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936443024] [2023-08-31 04:09:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:13,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:09:13,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:13,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936443024] [2023-08-31 04:09:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936443024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876627455] [2023-08-31 04:09:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:13,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:13,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:13,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:13,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:09:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 04:09:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:13,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 04:09:13,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:09:13,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:09:13,776 INFO L321 Elim1Store]: treesize reduction 37, result has 64.8 percent of original size [2023-08-31 04:09:13,776 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 101 [2023-08-31 04:09:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:09:14,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:14,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:14,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 176 [2023-08-31 04:09:14,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:14,915 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-08-31 04:09:15,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:15,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-08-31 04:09:15,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:15,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-08-31 04:09:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:09:19,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876627455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:19,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:19,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-08-31 04:09:19,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640879841] [2023-08-31 04:09:19,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:19,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:09:19,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:09:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=186, Unknown=4, NotChecked=0, Total=240 [2023-08-31 04:09:21,803 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] [2023-08-31 04:09:23,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:25,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:27,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:30,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:32,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:33,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:36,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:37,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:39,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:42,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:44,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:46,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:48,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:09:48,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-08-31 04:09:48,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 373 flow. Second operand has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:48,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:48,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-08-31 04:09:48,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:49,075 INFO L130 PetriNetUnfolder]: 275/487 cut-off events. [2023-08-31 04:09:49,075 INFO L131 PetriNetUnfolder]: For 1576/1596 co-relation queries the response was YES. [2023-08-31 04:09:49,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 487 events. 275/487 cut-off events. For 1576/1596 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1896 event pairs, 8 based on Foata normal form. 38/517 useless extension candidates. Maximal degree in co-relation 1976. Up to 249 conditions per place. [2023-08-31 04:09:49,079 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 75 selfloop transitions, 35 changer transitions 43/157 dead transitions. [2023-08-31 04:09:49,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 157 transitions, 1394 flow [2023-08-31 04:09:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:09:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:09:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2540 transitions. [2023-08-31 04:09:49,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810045358999889 [2023-08-31 04:09:49,088 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2540 transitions. [2023-08-31 04:09:49,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2540 transitions. [2023-08-31 04:09:49,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:49,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2540 transitions. [2023-08-31 04:09:49,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 110.43478260869566) internal successors, (2540), 23 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:49,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:49,109 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:49,109 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 373 flow. Second operand 23 states and 2540 transitions. [2023-08-31 04:09:49,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 157 transitions, 1394 flow [2023-08-31 04:09:49,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 157 transitions, 1201 flow, removed 74 selfloop flow, removed 5 redundant places. [2023-08-31 04:09:49,118 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 573 flow [2023-08-31 04:09:49,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=573, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-31 04:09:49,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-08-31 04:09:49,120 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 573 flow [2023-08-31 04:09:49,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.75) internal successors, (1724), 16 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:49,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:49,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:49,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:09:49,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:49,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:49,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1302241712, now seen corresponding path program 2 times [2023-08-31 04:09:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:49,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167578856] [2023-08-31 04:09:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:49,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 04:09:49,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:49,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167578856] [2023-08-31 04:09:49,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167578856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:49,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480205649] [2023-08-31 04:09:49,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:09:49,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:49,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:49,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:09:49,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:09:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:09:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 04:09:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:49,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-31 04:09:49,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:09:49,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:09:49,908 INFO L321 Elim1Store]: treesize reduction 41, result has 61.0 percent of original size [2023-08-31 04:09:49,908 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 97 [2023-08-31 04:09:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:09:50,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:55,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:55,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 176 [2023-08-31 04:09:55,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:55,231 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 852 treesize of output 804 [2023-08-31 04:09:55,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:55,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 228 [2023-08-31 04:09:55,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:09:55,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 225 [2023-08-31 04:09:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:09:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480205649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:59,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 04:09:59,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350187966] [2023-08-31 04:09:59,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:09:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:59,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:09:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=215, Unknown=4, NotChecked=0, Total=272 [2023-08-31 04:10:01,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:03,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:05,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:07,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:10,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:12,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:14,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:17,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:19,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:21,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:23,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:25,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:26,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:28,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:31,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:33,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:36,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:38,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:40,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:42,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:44,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:10:46,838 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] [2023-08-31 04:10:46,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 393 [2023-08-31 04:10:46,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 573 flow. Second operand has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:46,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:10:46,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 393 [2023-08-31 04:10:46,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:10:47,541 INFO L130 PetriNetUnfolder]: 225/419 cut-off events. [2023-08-31 04:10:47,541 INFO L131 PetriNetUnfolder]: For 1945/1964 co-relation queries the response was YES. [2023-08-31 04:10:47,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2236 conditions, 419 events. 225/419 cut-off events. For 1945/1964 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1645 event pairs, 4 based on Foata normal form. 43/460 useless extension candidates. Maximal degree in co-relation 2208. Up to 141 conditions per place. [2023-08-31 04:10:47,544 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 53 selfloop transitions, 24 changer transitions 55/136 dead transitions. [2023-08-31 04:10:47,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1265 flow [2023-08-31 04:10:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 04:10:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 04:10:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2094 transitions. [2023-08-31 04:10:47,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2804339092004821 [2023-08-31 04:10:47,551 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2094 transitions. [2023-08-31 04:10:47,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2094 transitions. [2023-08-31 04:10:47,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:10:47,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2094 transitions. [2023-08-31 04:10:47,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.21052631578948) internal successors, (2094), 19 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:47,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:47,565 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:47,566 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 573 flow. Second operand 19 states and 2094 transitions. [2023-08-31 04:10:47,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1265 flow [2023-08-31 04:10:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 1158 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-08-31 04:10:47,575 INFO L231 Difference]: Finished difference. Result has 84 places, 49 transitions, 471 flow [2023-08-31 04:10:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=471, PETRI_PLACES=84, PETRI_TRANSITIONS=49} [2023-08-31 04:10:47,575 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-08-31 04:10:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 49 transitions, 471 flow [2023-08-31 04:10:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.88235294117646) internal successors, (1834), 17 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:47,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:10:47,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:10:47,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 04:10:47,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:47,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:10:47,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:10:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1189533459, now seen corresponding path program 3 times [2023-08-31 04:10:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:10:47,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743434091] [2023-08-31 04:10:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:10:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:10:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:10:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:10:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:10:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743434091] [2023-08-31 04:10:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743434091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:10:50,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483789179] [2023-08-31 04:10:50,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:10:50,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:10:50,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:10:50,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:10:51,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 04:10:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:10:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 04:10:51,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:10:51,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:10:51,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:10:51,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:10:51,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:10:51,520 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2023-08-31 04:10:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:10:51,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:10:51,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:10:51,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 218 [2023-08-31 04:10:52,353 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-31 04:10:52,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 488 treesize of output 691 [2023-08-31 04:10:52,799 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-31 04:10:52,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 376 treesize of output 520 [2023-08-31 04:10:53,287 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-31 04:10:53,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 373 [2023-08-31 04:11:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:16,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483789179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:16,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:16,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-31 04:11:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976394957] [2023-08-31 04:11:16,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:16,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 04:11:16,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 04:11:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=746, Unknown=4, NotChecked=0, Total=870 [2023-08-31 04:11:20,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:20,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-31 04:11:20,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 49 transitions, 471 flow. Second operand has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:20,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:20,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-31 04:11:20,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:27,555 INFO L130 PetriNetUnfolder]: 501/889 cut-off events. [2023-08-31 04:11:27,555 INFO L131 PetriNetUnfolder]: For 3762/3802 co-relation queries the response was YES. [2023-08-31 04:11:27,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4649 conditions, 889 events. 501/889 cut-off events. For 3762/3802 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3788 event pairs, 30 based on Foata normal form. 40/919 useless extension candidates. Maximal degree in co-relation 4596. Up to 356 conditions per place. [2023-08-31 04:11:27,565 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 125 selfloop transitions, 75 changer transitions 13/220 dead transitions. [2023-08-31 04:11:27,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 220 transitions, 2194 flow [2023-08-31 04:11:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:11:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:11:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2922 transitions. [2023-08-31 04:11:27,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097964376590331 [2023-08-31 04:11:27,573 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2922 transitions. [2023-08-31 04:11:27,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2922 transitions. [2023-08-31 04:11:27,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:27,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2922 transitions. [2023-08-31 04:11:27,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.75) internal successors, (2922), 24 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:27,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:27,596 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:27,596 INFO L175 Difference]: Start difference. First operand has 84 places, 49 transitions, 471 flow. Second operand 24 states and 2922 transitions. [2023-08-31 04:11:27,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 220 transitions, 2194 flow [2023-08-31 04:11:27,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 220 transitions, 1859 flow, removed 101 selfloop flow, removed 16 redundant places. [2023-08-31 04:11:27,611 INFO L231 Difference]: Finished difference. Result has 86 places, 120 transitions, 1292 flow [2023-08-31 04:11:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1292, PETRI_PLACES=86, PETRI_TRANSITIONS=120} [2023-08-31 04:11:27,611 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-08-31 04:11:27,612 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 120 transitions, 1292 flow [2023-08-31 04:11:27,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 116.5) internal successors, (3495), 30 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:27,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:27,613 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:27,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:27,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-31 04:11:27,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:27,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash -948692765, now seen corresponding path program 4 times [2023-08-31 04:11:27,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249614243] [2023-08-31 04:11:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249614243] [2023-08-31 04:11:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249614243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109600399] [2023-08-31 04:11:30,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:11:30,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:30,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:30,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:11:31,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:11:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 04:11:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:31,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:31,233 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:11:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:31,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:31,770 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:11:31,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:11:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:32,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109600399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:32,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:32,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-08-31 04:11:32,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73747239] [2023-08-31 04:11:32,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:32,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:11:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:11:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-08-31 04:11:35,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 393 [2023-08-31 04:11:35,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 120 transitions, 1292 flow. Second operand has 23 states, 23 states have (on average 141.91304347826087) internal successors, (3264), 23 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:35,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:35,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 393 [2023-08-31 04:11:35,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:36,858 INFO L130 PetriNetUnfolder]: 909/1626 cut-off events. [2023-08-31 04:11:36,858 INFO L131 PetriNetUnfolder]: For 6361/6407 co-relation queries the response was YES. [2023-08-31 04:11:36,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 1626 events. 909/1626 cut-off events. For 6361/6407 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8255 event pairs, 128 based on Foata normal form. 42/1651 useless extension candidates. Maximal degree in co-relation 7649. Up to 856 conditions per place. [2023-08-31 04:11:36,876 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 159 selfloop transitions, 113 changer transitions 7/286 dead transitions. [2023-08-31 04:11:36,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 286 transitions, 3146 flow [2023-08-31 04:11:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:11:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:11:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3368 transitions. [2023-08-31 04:11:36,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37260758933510346 [2023-08-31 04:11:36,882 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3368 transitions. [2023-08-31 04:11:36,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3368 transitions. [2023-08-31 04:11:36,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:36,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3368 transitions. [2023-08-31 04:11:36,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 146.43478260869566) internal successors, (3368), 23 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:36,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:36,901 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:36,901 INFO L175 Difference]: Start difference. First operand has 86 places, 120 transitions, 1292 flow. Second operand 23 states and 3368 transitions. [2023-08-31 04:11:36,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 286 transitions, 3146 flow [2023-08-31 04:11:36,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 286 transitions, 2902 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-08-31 04:11:36,924 INFO L231 Difference]: Finished difference. Result has 111 places, 204 transitions, 2299 flow [2023-08-31 04:11:36,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2299, PETRI_PLACES=111, PETRI_TRANSITIONS=204} [2023-08-31 04:11:36,925 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2023-08-31 04:11:36,925 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 204 transitions, 2299 flow [2023-08-31 04:11:36,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 141.91304347826087) internal successors, (3264), 23 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:36,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:36,926 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:36,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:37,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:37,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:37,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1651791961, now seen corresponding path program 5 times [2023-08-31 04:11:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:37,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793806626] [2023-08-31 04:11:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793806626] [2023-08-31 04:11:39,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793806626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743165396] [2023-08-31 04:11:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:11:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:39,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:39,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:11:39,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 04:11:39,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 04:11:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:40,202 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:11:40,294 INFO L321 Elim1Store]: treesize reduction 169, result has 27.2 percent of original size [2023-08-31 04:11:40,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 99 [2023-08-31 04:11:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:40,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:40,829 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:11:40,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:11:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:41,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743165396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:41,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:41,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-31 04:11:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678857328] [2023-08-31 04:11:41,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:41,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:11:41,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:11:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-08-31 04:11:43,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 393 [2023-08-31 04:11:43,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 204 transitions, 2299 flow. Second operand has 24 states, 24 states have (on average 142.91666666666666) internal successors, (3430), 24 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:43,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:43,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 393 [2023-08-31 04:11:43,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:45,688 INFO L130 PetriNetUnfolder]: 1453/2616 cut-off events. [2023-08-31 04:11:45,688 INFO L131 PetriNetUnfolder]: For 11228/11272 co-relation queries the response was YES. [2023-08-31 04:11:45,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13308 conditions, 2616 events. 1453/2616 cut-off events. For 11228/11272 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15172 event pairs, 242 based on Foata normal form. 39/2641 useless extension candidates. Maximal degree in co-relation 12501. Up to 1581 conditions per place. [2023-08-31 04:11:45,706 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 209 selfloop transitions, 137 changer transitions 5/358 dead transitions. [2023-08-31 04:11:45,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 358 transitions, 4361 flow [2023-08-31 04:11:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:11:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:11:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3528 transitions. [2023-08-31 04:11:45,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37404580152671757 [2023-08-31 04:11:45,712 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3528 transitions. [2023-08-31 04:11:45,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3528 transitions. [2023-08-31 04:11:45,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:45,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3528 transitions. [2023-08-31 04:11:45,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:45,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:45,728 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:45,729 INFO L175 Difference]: Start difference. First operand has 111 places, 204 transitions, 2299 flow. Second operand 24 states and 3528 transitions. [2023-08-31 04:11:45,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 358 transitions, 4361 flow [2023-08-31 04:11:45,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 358 transitions, 4059 flow, removed 136 selfloop flow, removed 6 redundant places. [2023-08-31 04:11:45,772 INFO L231 Difference]: Finished difference. Result has 134 places, 281 transitions, 3428 flow [2023-08-31 04:11:45,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3428, PETRI_PLACES=134, PETRI_TRANSITIONS=281} [2023-08-31 04:11:45,773 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-08-31 04:11:45,773 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 281 transitions, 3428 flow [2023-08-31 04:11:45,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 142.91666666666666) internal successors, (3430), 24 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:45,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:45,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:45,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:45,980 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:45,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1515982353, now seen corresponding path program 6 times [2023-08-31 04:11:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:45,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570769390] [2023-08-31 04:11:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:48,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:48,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570769390] [2023-08-31 04:11:48,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570769390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:48,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044719624] [2023-08-31 04:11:48,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:11:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:48,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:48,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:11:48,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:11:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-31 04:11:48,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:49,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:49,005 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:11:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:49,475 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:11:49,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:11:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044719624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:50,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:50,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 21 [2023-08-31 04:11:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870768010] [2023-08-31 04:11:50,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:11:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:11:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-08-31 04:11:53,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 393 [2023-08-31 04:11:53,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 281 transitions, 3428 flow. Second operand has 23 states, 23 states have (on average 142.91304347826087) internal successors, (3287), 23 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:53,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:53,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 393 [2023-08-31 04:11:53,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:55,059 INFO L130 PetriNetUnfolder]: 2041/3679 cut-off events. [2023-08-31 04:11:55,060 INFO L131 PetriNetUnfolder]: For 18115/18153 co-relation queries the response was YES. [2023-08-31 04:11:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19301 conditions, 3679 events. 2041/3679 cut-off events. For 18115/18153 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23425 event pairs, 433 based on Foata normal form. 36/3698 useless extension candidates. Maximal degree in co-relation 18038. Up to 2503 conditions per place. [2023-08-31 04:11:55,097 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 282 selfloop transitions, 153 changer transitions 9/451 dead transitions. [2023-08-31 04:11:55,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 451 transitions, 5965 flow [2023-08-31 04:11:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:11:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:11:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3520 transitions. [2023-08-31 04:11:55,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37319762510602206 [2023-08-31 04:11:55,102 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3520 transitions. [2023-08-31 04:11:55,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3520 transitions. [2023-08-31 04:11:55,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:55,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3520 transitions. [2023-08-31 04:11:55,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.66666666666666) internal successors, (3520), 24 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,114 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,114 INFO L175 Difference]: Start difference. First operand has 134 places, 281 transitions, 3428 flow. Second operand 24 states and 3520 transitions. [2023-08-31 04:11:55,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 451 transitions, 5965 flow [2023-08-31 04:11:55,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 451 transitions, 5756 flow, removed 67 selfloop flow, removed 11 redundant places. [2023-08-31 04:11:55,183 INFO L231 Difference]: Finished difference. Result has 157 places, 374 transitions, 5065 flow [2023-08-31 04:11:55,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5065, PETRI_PLACES=157, PETRI_TRANSITIONS=374} [2023-08-31 04:11:55,185 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-08-31 04:11:55,185 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 374 transitions, 5065 flow [2023-08-31 04:11:55,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 142.91304347826087) internal successors, (3287), 23 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:55,186 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:55,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:55,391 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,SelfDestructingSolverStorable13 [2023-08-31 04:11:55,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:55,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1703906409, now seen corresponding path program 7 times [2023-08-31 04:11:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:55,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101500774] [2023-08-31 04:11:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101500774] [2023-08-31 04:11:58,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101500774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313702805] [2023-08-31 04:11:58,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:11:58,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:58,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:58,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 04:11:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:11:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:58,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:11:58,342 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 32 treesize of output 28 [2023-08-31 04:11:58,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:58,404 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:11:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:58,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:58,662 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_391 (Array Int Int))) (= (let ((.cse0 (select |c_#memory_int| c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) 4)))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse1 (+ (* (select .cse1 (+ (* 4 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2023-08-31 04:11:58,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:58,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 136 treesize of output 360 [2023-08-31 04:11:58,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:58,897 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 92 [2023-08-31 04:12:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-08-31 04:12:00,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313702805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:00,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:00,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-31 04:12:00,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223875983] [2023-08-31 04:12:00,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:00,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:12:00,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:00,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:12:00,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=573, Unknown=11, NotChecked=48, Total=702 [2023-08-31 04:12:01,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-31 04:12:01,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 374 transitions, 5065 flow. Second operand has 27 states, 27 states have (on average 116.62962962962963) internal successors, (3149), 27 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:01,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:01,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-31 04:12:01,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:03,041 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~f~0.base))) (let ((.cse3 (+ (* c_~x2~0 4) c_~f~0.offset)) (.cse1 (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)))) (and (forall ((v_ArrVal_391 (Array Int Int))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* .cse1 4))) 4))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse2 (+ (* (select .cse2 (+ (* 4 (select .cse2 (+ c_~f~0.offset (* (select .cse2 .cse3) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))))) (forall ((v_ArrVal_391 (Array Int Int))) (= (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse4 (+ (* (select .cse4 (+ (* 4 (select .cse4 (+ c_~f~0.offset (* (select .cse4 .cse3) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))) .cse1))))) is different from false [2023-08-31 04:12:03,215 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_391 (Array Int Int))) (= c_~x1~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse0 (+ (* (select .cse0 (+ (* 4 (select .cse0 (+ c_~f~0.offset (* (select .cse0 .cse1) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))))) (forall ((v_ArrVal_391 (Array Int Int))) (= (let ((.cse2 (select |c_#memory_int| c_~f~0.base))) (select .cse2 (+ c_~f~0.offset (* (select .cse2 (+ (* c_~x1~0 4) c_~f~0.offset)) 4)))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_391) c_~f~0.base))) (select .cse3 (+ (* (select .cse3 (+ (* 4 (select .cse3 (+ c_~f~0.offset (* (select .cse3 .cse1) 4)))) c_~f~0.offset)) 4) c_~f~0.offset))))))) is different from false [2023-08-31 04:12:04,359 INFO L130 PetriNetUnfolder]: 2550/4595 cut-off events. [2023-08-31 04:12:04,359 INFO L131 PetriNetUnfolder]: For 26807/26872 co-relation queries the response was YES. [2023-08-31 04:12:04,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25735 conditions, 4595 events. 2550/4595 cut-off events. For 26807/26872 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 30368 event pairs, 533 based on Foata normal form. 62/4647 useless extension candidates. Maximal degree in co-relation 24354. Up to 3503 conditions per place. [2023-08-31 04:12:04,393 INFO L137 encePairwiseOnDemand]: 384/393 looper letters, 341 selfloop transitions, 193 changer transitions 11/552 dead transitions. [2023-08-31 04:12:04,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 552 transitions, 8094 flow [2023-08-31 04:12:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:12:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:12:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2905 transitions. [2023-08-31 04:12:04,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30799406276505514 [2023-08-31 04:12:04,398 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2905 transitions. [2023-08-31 04:12:04,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2905 transitions. [2023-08-31 04:12:04,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:04,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2905 transitions. [2023-08-31 04:12:04,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 121.04166666666667) internal successors, (2905), 24 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:04,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:04,410 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:04,410 INFO L175 Difference]: Start difference. First operand has 157 places, 374 transitions, 5065 flow. Second operand 24 states and 2905 transitions. [2023-08-31 04:12:04,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 552 transitions, 8094 flow [2023-08-31 04:12:04,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 552 transitions, 7894 flow, removed 67 selfloop flow, removed 10 redundant places. [2023-08-31 04:12:04,542 INFO L231 Difference]: Finished difference. Result has 179 places, 482 transitions, 7097 flow [2023-08-31 04:12:04,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7097, PETRI_PLACES=179, PETRI_TRANSITIONS=482} [2023-08-31 04:12:04,544 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2023-08-31 04:12:04,544 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 482 transitions, 7097 flow [2023-08-31 04:12:04,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.62962962962963) internal successors, (3149), 27 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:04,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:04,545 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:04,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:04,750 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,SelfDestructingSolverStorable14 [2023-08-31 04:12:04,750 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:04,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1374737613, now seen corresponding path program 8 times [2023-08-31 04:12:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731473101] [2023-08-31 04:12:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:12:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731473101] [2023-08-31 04:12:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731473101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343631758] [2023-08-31 04:12:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:12:07,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:07,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:07,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 04:12:07,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:12:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 04:12:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:12:07,820 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 26 treesize of output 24 [2023-08-31 04:12:07,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:07,912 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:12:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:12:07,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:08,034 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_426 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_426) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4))) 4) c_~f~0.offset)) (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) is different from false [2023-08-31 04:12:08,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:08,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 366 [2023-08-31 04:12:08,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:08,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-08-31 04:12:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:10,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343631758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:10,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:10,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-31 04:12:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267373727] [2023-08-31 04:12:10,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:10,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:12:10,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:12:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=568, Unknown=7, NotChecked=48, Total=702 [2023-08-31 04:12:11,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-31 04:12:11,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 482 transitions, 7097 flow. Second operand has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:11,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:11,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-31 04:12:11,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:21,827 INFO L130 PetriNetUnfolder]: 3171/5717 cut-off events. [2023-08-31 04:12:21,827 INFO L131 PetriNetUnfolder]: For 56599/56667 co-relation queries the response was YES. [2023-08-31 04:12:21,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41263 conditions, 5717 events. 3171/5717 cut-off events. For 56599/56667 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39563 event pairs, 626 based on Foata normal form. 63/5765 useless extension candidates. Maximal degree in co-relation 39555. Up to 4143 conditions per place. [2023-08-31 04:12:21,886 INFO L137 encePairwiseOnDemand]: 384/393 looper letters, 427 selfloop transitions, 257 changer transitions 2/693 dead transitions. [2023-08-31 04:12:21,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 693 transitions, 11357 flow [2023-08-31 04:12:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 04:12:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 04:12:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3152 transitions. [2023-08-31 04:12:21,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3084752397729497 [2023-08-31 04:12:21,891 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3152 transitions. [2023-08-31 04:12:21,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3152 transitions. [2023-08-31 04:12:21,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:21,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3152 transitions. [2023-08-31 04:12:21,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 121.23076923076923) internal successors, (3152), 26 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:21,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:21,906 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:21,906 INFO L175 Difference]: Start difference. First operand has 179 places, 482 transitions, 7097 flow. Second operand 26 states and 3152 transitions. [2023-08-31 04:12:21,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 693 transitions, 11357 flow [2023-08-31 04:12:22,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 693 transitions, 10822 flow, removed 257 selfloop flow, removed 5 redundant places. [2023-08-31 04:12:22,137 INFO L231 Difference]: Finished difference. Result has 206 places, 605 transitions, 9560 flow [2023-08-31 04:12:22,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=6660, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9560, PETRI_PLACES=206, PETRI_TRANSITIONS=605} [2023-08-31 04:12:22,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-08-31 04:12:22,139 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 605 transitions, 9560 flow [2023-08-31 04:12:22,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:22,141 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:22,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:22,346 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,SelfDestructingSolverStorable15 [2023-08-31 04:12:22,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:22,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash -788623201, now seen corresponding path program 9 times [2023-08-31 04:12:22,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:22,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345716376] [2023-08-31 04:12:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:22,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:12:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345716376] [2023-08-31 04:12:24,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345716376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:24,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468169956] [2023-08-31 04:12:24,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:12:24,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:24,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:24,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 04:12:24,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:12:24,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:24,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 04:12:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:12:24,908 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 [2023-08-31 04:12:25,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:25,055 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:12:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:12:25,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:27,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:27,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 378 [2023-08-31 04:12:27,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:27,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 49 treesize of output 256 [2023-08-31 04:12:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468169956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:31,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:31,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-31 04:12:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724688621] [2023-08-31 04:12:31,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:12:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:12:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=619, Unknown=4, NotChecked=0, Total=702 [2023-08-31 04:12:34,649 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] [2023-08-31 04:12:37,446 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] [2023-08-31 04:12:37,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-31 04:12:37,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 605 transitions, 9560 flow. Second operand has 27 states, 27 states have (on average 116.62962962962963) internal successors, (3149), 27 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:37,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:37,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-31 04:12:37,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:44,683 INFO L130 PetriNetUnfolder]: 3543/6401 cut-off events. [2023-08-31 04:12:44,683 INFO L131 PetriNetUnfolder]: For 91639/91712 co-relation queries the response was YES. [2023-08-31 04:12:44,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52734 conditions, 6401 events. 3543/6401 cut-off events. For 91639/91712 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45844 event pairs, 642 based on Foata normal form. 52/6434 useless extension candidates. Maximal degree in co-relation 50802. Up to 4405 conditions per place. [2023-08-31 04:12:44,834 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 507 selfloop transitions, 265 changer transitions 2/781 dead transitions. [2023-08-31 04:12:44,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 781 transitions, 13763 flow [2023-08-31 04:12:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 04:12:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 04:12:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3254 transitions. [2023-08-31 04:12:44,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3066628969936858 [2023-08-31 04:12:44,840 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3254 transitions. [2023-08-31 04:12:44,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3254 transitions. [2023-08-31 04:12:44,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:44,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3254 transitions. [2023-08-31 04:12:44,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 120.51851851851852) internal successors, (3254), 27 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:44,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 393.0) internal successors, (11004), 28 states have internal predecessors, (11004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:44,853 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 393.0) internal successors, (11004), 28 states have internal predecessors, (11004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:44,853 INFO L175 Difference]: Start difference. First operand has 206 places, 605 transitions, 9560 flow. Second operand 27 states and 3254 transitions. [2023-08-31 04:12:44,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 781 transitions, 13763 flow [2023-08-31 04:12:45,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 781 transitions, 12984 flow, removed 332 selfloop flow, removed 11 redundant places. [2023-08-31 04:12:45,226 INFO L231 Difference]: Finished difference. Result has 233 places, 681 transitions, 11289 flow [2023-08-31 04:12:45,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=9005, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11289, PETRI_PLACES=233, PETRI_TRANSITIONS=681} [2023-08-31 04:12:45,226 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-08-31 04:12:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 681 transitions, 11289 flow [2023-08-31 04:12:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.62962962962963) internal successors, (3149), 27 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:45,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:45,228 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:45,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 04:12:45,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 04:12:45,433 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:45,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -302379123, now seen corresponding path program 10 times [2023-08-31 04:12:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:45,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152972689] [2023-08-31 04:12:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:12:47,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152972689] [2023-08-31 04:12:47,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152972689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531141285] [2023-08-31 04:12:47,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:12:47,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:47,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:47,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:47,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 04:12:47,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:12:47,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:47,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:12:47,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:12:47,649 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 [2023-08-31 04:12:47,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:47,801 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:12:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:12:47,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:50,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:50,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 378 [2023-08-31 04:12:50,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:12:50,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 49 treesize of output 256 [2023-08-31 04:12:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:54,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531141285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:54,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:54,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-31 04:12:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131754493] [2023-08-31 04:12:54,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:54,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:12:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:12:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=622, Unknown=5, NotChecked=0, Total=702 [2023-08-31 04:12:57,454 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] [2023-08-31 04:12:57,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 393 [2023-08-31 04:12:57,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 681 transitions, 11289 flow. Second operand has 27 states, 27 states have (on average 119.70370370370371) internal successors, (3232), 27 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:57,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:57,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 393 [2023-08-31 04:12:57,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:01,320 INFO L130 PetriNetUnfolder]: 4022/7273 cut-off events. [2023-08-31 04:13:01,320 INFO L131 PetriNetUnfolder]: For 113283/113345 co-relation queries the response was YES. [2023-08-31 04:13:01,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60576 conditions, 7273 events. 4022/7273 cut-off events. For 113283/113345 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 53016 event pairs, 808 based on Foata normal form. 54/7304 useless extension candidates. Maximal degree in co-relation 58670. Up to 4153 conditions per place. [2023-08-31 04:13:01,502 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 624 selfloop transitions, 225 changer transitions 13/869 dead transitions. [2023-08-31 04:13:01,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 869 transitions, 15710 flow [2023-08-31 04:13:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:13:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:13:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3478 transitions. [2023-08-31 04:13:01,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3160668847691748 [2023-08-31 04:13:01,515 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3478 transitions. [2023-08-31 04:13:01,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3478 transitions. [2023-08-31 04:13:01,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:01,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3478 transitions. [2023-08-31 04:13:01,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 124.21428571428571) internal successors, (3478), 28 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:01,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 393.0) internal successors, (11397), 29 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:01,536 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 393.0) internal successors, (11397), 29 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:01,536 INFO L175 Difference]: Start difference. First operand has 233 places, 681 transitions, 11289 flow. Second operand 28 states and 3478 transitions. [2023-08-31 04:13:01,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 869 transitions, 15710 flow [2023-08-31 04:13:01,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 869 transitions, 15344 flow, removed 149 selfloop flow, removed 9 redundant places. [2023-08-31 04:13:01,915 INFO L231 Difference]: Finished difference. Result has 259 places, 741 transitions, 12855 flow [2023-08-31 04:13:01,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=10995, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12855, PETRI_PLACES=259, PETRI_TRANSITIONS=741} [2023-08-31 04:13:01,917 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-08-31 04:13:01,917 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 741 transitions, 12855 flow [2023-08-31 04:13:01,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 119.70370370370371) internal successors, (3232), 27 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:01,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:01,918 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:01,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:02,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 04:13:02,120 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:02,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1522584053, now seen corresponding path program 11 times [2023-08-31 04:13:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:02,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739477271] [2023-08-31 04:13:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:13:04,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:04,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739477271] [2023-08-31 04:13:04,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739477271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:04,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881743745] [2023-08-31 04:13:04,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:13:04,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:04,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:04,199 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:13:04,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 04:13:04,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 04:13:04,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:13:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:13:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:04,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:13:04,481 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 20 treesize of output 20 [2023-08-31 04:13:04,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:13:04,759 INFO L321 Elim1Store]: treesize reduction 171, result has 26.3 percent of original size [2023-08-31 04:13:04,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 97 [2023-08-31 04:13:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:04,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:07,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:07,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 372 [2023-08-31 04:13:07,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:07,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 43 treesize of output 192 [2023-08-31 04:13:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:10,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881743745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:10,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:10,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-31 04:13:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356193535] [2023-08-31 04:13:10,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:13:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:10,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:13:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=626, Unknown=3, NotChecked=0, Total=702 [2023-08-31 04:13:13,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:15,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:17,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:21,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:21,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 393 [2023-08-31 04:13:21,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 741 transitions, 12855 flow. Second operand has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:21,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:21,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 393 [2023-08-31 04:13:21,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:29,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:31,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:33,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:35,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:37,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:39,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:41,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:43,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:46,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:48,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:50,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:52,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:54,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:13:55,408 INFO L130 PetriNetUnfolder]: 4191/7587 cut-off events. [2023-08-31 04:13:55,408 INFO L131 PetriNetUnfolder]: For 125941/126012 co-relation queries the response was YES. [2023-08-31 04:13:55,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64548 conditions, 7587 events. 4191/7587 cut-off events. For 125941/126012 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 55847 event pairs, 987 based on Foata normal form. 50/7616 useless extension candidates. Maximal degree in co-relation 62621. Up to 6557 conditions per place. [2023-08-31 04:13:55,474 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 619 selfloop transitions, 204 changer transitions 2/832 dead transitions. [2023-08-31 04:13:55,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 832 transitions, 15819 flow [2023-08-31 04:13:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 04:13:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 04:13:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2520 transitions. [2023-08-31 04:13:55,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3053435114503817 [2023-08-31 04:13:55,478 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2520 transitions. [2023-08-31 04:13:55,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2520 transitions. [2023-08-31 04:13:55,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:55,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2520 transitions. [2023-08-31 04:13:55,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 120.0) internal successors, (2520), 21 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:55,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 393.0) internal successors, (8646), 22 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:55,488 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 393.0) internal successors, (8646), 22 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:55,488 INFO L175 Difference]: Start difference. First operand has 259 places, 741 transitions, 12855 flow. Second operand 21 states and 2520 transitions. [2023-08-31 04:13:55,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 832 transitions, 15819 flow [2023-08-31 04:13:55,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 832 transitions, 15351 flow, removed 166 selfloop flow, removed 11 redundant places. [2023-08-31 04:13:55,846 INFO L231 Difference]: Finished difference. Result has 274 places, 775 transitions, 13759 flow [2023-08-31 04:13:55,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=12389, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13759, PETRI_PLACES=274, PETRI_TRANSITIONS=775} [2023-08-31 04:13:55,846 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-08-31 04:13:55,847 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 775 transitions, 13759 flow [2023-08-31 04:13:55,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.70370370370371) internal successors, (3151), 27 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:55,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:55,847 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:55,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:56,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:56,048 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:56,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:56,049 INFO L85 PathProgramCache]: Analyzing trace with hash 642959107, now seen corresponding path program 12 times [2023-08-31 04:13:56,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770539449] [2023-08-31 04:13:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770539449] [2023-08-31 04:14:09,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770539449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482540408] [2023-08-31 04:14:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:14:09,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:09,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:09,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:14:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 04:14:09,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:14:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 04:14:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:09,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:09,877 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:14:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:09,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:10,395 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:14:10,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:14:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 04:14:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482540408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:11,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:11,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 5] total 23 [2023-08-31 04:14:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499897221] [2023-08-31 04:14:11,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:11,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 04:14:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 04:14:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-08-31 04:14:14,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 393 [2023-08-31 04:14:14,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 775 transitions, 13759 flow. Second operand has 25 states, 25 states have (on average 141.92) internal successors, (3548), 25 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:14,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:14,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 393 [2023-08-31 04:14:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:18,019 INFO L130 PetriNetUnfolder]: 4445/8042 cut-off events. [2023-08-31 04:14:18,019 INFO L131 PetriNetUnfolder]: For 135513/135589 co-relation queries the response was YES. [2023-08-31 04:14:18,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69253 conditions, 8042 events. 4445/8042 cut-off events. For 135513/135589 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 59427 event pairs, 1418 based on Foata normal form. 55/8065 useless extension candidates. Maximal degree in co-relation 67200. Up to 7562 conditions per place. [2023-08-31 04:14:18,101 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 799 selfloop transitions, 77 changer transitions 1/884 dead transitions. [2023-08-31 04:14:18,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 884 transitions, 17272 flow [2023-08-31 04:14:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 04:14:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 04:14:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3051 transitions. [2023-08-31 04:14:18,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696837513631407 [2023-08-31 04:14:18,103 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3051 transitions. [2023-08-31 04:14:18,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3051 transitions. [2023-08-31 04:14:18,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:18,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3051 transitions. [2023-08-31 04:14:18,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 145.28571428571428) internal successors, (3051), 21 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 393.0) internal successors, (8646), 22 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,113 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 393.0) internal successors, (8646), 22 states have internal predecessors, (8646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,113 INFO L175 Difference]: Start difference. First operand has 274 places, 775 transitions, 13759 flow. Second operand 21 states and 3051 transitions. [2023-08-31 04:14:18,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 884 transitions, 17272 flow [2023-08-31 04:14:18,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 884 transitions, 17003 flow, removed 78 selfloop flow, removed 11 redundant places. [2023-08-31 04:14:18,576 INFO L231 Difference]: Finished difference. Result has 290 places, 825 transitions, 14801 flow [2023-08-31 04:14:18,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=13507, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=14801, PETRI_PLACES=290, PETRI_TRANSITIONS=825} [2023-08-31 04:14:18,577 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 269 predicate places. [2023-08-31 04:14:18,577 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 825 transitions, 14801 flow [2023-08-31 04:14:18,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 141.92) internal successors, (3548), 25 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:18,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:18,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:18,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:18,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:18,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -556350376, now seen corresponding path program 13 times [2023-08-31 04:14:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126246678] [2023-08-31 04:14:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126246678] [2023-08-31 04:14:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126246678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975337849] [2023-08-31 04:14:19,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:14:19,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:19,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:19,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:14:19,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 04:14:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:14:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:19,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975337849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:19,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:19,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2023-08-31 04:14:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766758272] [2023-08-31 04:14:19,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:19,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:14:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:14:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:14:19,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:14:19,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 825 transitions, 14801 flow. Second operand has 20 states, 20 states have (on average 150.8) internal successors, (3016), 20 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:19,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:19,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:14:19,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:23,631 INFO L130 PetriNetUnfolder]: 6010/10913 cut-off events. [2023-08-31 04:14:23,631 INFO L131 PetriNetUnfolder]: For 184198/184198 co-relation queries the response was YES. [2023-08-31 04:14:23,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93857 conditions, 10913 events. 6010/10913 cut-off events. For 184198/184198 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 84690 event pairs, 722 based on Foata normal form. 50/10961 useless extension candidates. Maximal degree in co-relation 91548. Up to 4814 conditions per place. [2023-08-31 04:14:23,744 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 764 selfloop transitions, 378 changer transitions 0/1142 dead transitions. [2023-08-31 04:14:23,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1142 transitions, 22362 flow [2023-08-31 04:14:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:14:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:14:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2188 transitions. [2023-08-31 04:14:23,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976735732460923 [2023-08-31 04:14:23,746 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2188 transitions. [2023-08-31 04:14:23,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2188 transitions. [2023-08-31 04:14:23,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:23,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2188 transitions. [2023-08-31 04:14:23,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 156.28571428571428) internal successors, (2188), 14 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:23,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 393.0) internal successors, (5895), 15 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:23,751 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 393.0) internal successors, (5895), 15 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:23,751 INFO L175 Difference]: Start difference. First operand has 290 places, 825 transitions, 14801 flow. Second operand 14 states and 2188 transitions. [2023-08-31 04:14:23,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1142 transitions, 22362 flow [2023-08-31 04:14:24,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1142 transitions, 21898 flow, removed 225 selfloop flow, removed 4 redundant places. [2023-08-31 04:14:24,370 INFO L231 Difference]: Finished difference. Result has 306 places, 934 transitions, 18254 flow [2023-08-31 04:14:24,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=14451, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18254, PETRI_PLACES=306, PETRI_TRANSITIONS=934} [2023-08-31 04:14:24,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-08-31 04:14:24,372 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 934 transitions, 18254 flow [2023-08-31 04:14:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 150.8) internal successors, (3016), 20 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:24,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:24,373 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:24,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:24,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:24,579 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:24,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -750135380, now seen corresponding path program 14 times [2023-08-31 04:14:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:24,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945513403] [2023-08-31 04:14:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:24,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:24,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:24,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945513403] [2023-08-31 04:14:24,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945513403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:24,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861262265] [2023-08-31 04:14:24,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:14:24,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:24,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:24,821 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:14:24,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 04:14:24,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 04:14:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:25,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861262265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:25,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:25,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-08-31 04:14:25,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341293264] [2023-08-31 04:14:25,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:25,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:14:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:14:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:14:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-31 04:14:25,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 934 transitions, 18254 flow. Second operand has 21 states, 21 states have (on average 153.8095238095238) internal successors, (3230), 21 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:25,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:25,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-31 04:14:25,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:30,718 INFO L130 PetriNetUnfolder]: 6338/11610 cut-off events. [2023-08-31 04:14:30,719 INFO L131 PetriNetUnfolder]: For 232755/232755 co-relation queries the response was YES. [2023-08-31 04:14:30,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105508 conditions, 11610 events. 6338/11610 cut-off events. For 232755/232755 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 92716 event pairs, 555 based on Foata normal form. 66/11675 useless extension candidates. Maximal degree in co-relation 104711. Up to 4980 conditions per place. [2023-08-31 04:14:30,840 INFO L137 encePairwiseOnDemand]: 386/393 looper letters, 785 selfloop transitions, 455 changer transitions 43/1283 dead transitions. [2023-08-31 04:14:30,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1283 transitions, 26245 flow [2023-08-31 04:14:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 04:14:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 04:14:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3027 transitions. [2023-08-31 04:14:30,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053836882282041 [2023-08-31 04:14:30,843 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3027 transitions. [2023-08-31 04:14:30,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3027 transitions. [2023-08-31 04:14:30,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:30,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3027 transitions. [2023-08-31 04:14:30,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 159.31578947368422) internal successors, (3027), 19 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:30,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:30,852 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 393.0) internal successors, (7860), 20 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:30,852 INFO L175 Difference]: Start difference. First operand has 306 places, 934 transitions, 18254 flow. Second operand 19 states and 3027 transitions. [2023-08-31 04:14:30,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1283 transitions, 26245 flow [2023-08-31 04:14:31,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1283 transitions, 25714 flow, removed 119 selfloop flow, removed 6 redundant places. [2023-08-31 04:14:31,722 INFO L231 Difference]: Finished difference. Result has 326 places, 1013 transitions, 20773 flow [2023-08-31 04:14:31,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=17817, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20773, PETRI_PLACES=326, PETRI_TRANSITIONS=1013} [2023-08-31 04:14:31,722 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-08-31 04:14:31,723 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1013 transitions, 20773 flow [2023-08-31 04:14:31,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 153.8095238095238) internal successors, (3230), 21 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:31,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:31,723 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:31,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-31 04:14:31,923 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,SelfDestructingSolverStorable21 [2023-08-31 04:14:31,924 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:31,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 152609404, now seen corresponding path program 15 times [2023-08-31 04:14:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:31,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775389254] [2023-08-31 04:14:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775389254] [2023-08-31 04:14:32,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775389254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015821795] [2023-08-31 04:14:32,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:14:32,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:32,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:14:32,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 04:14:32,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 04:14:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:14:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:32,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:32,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015821795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:32,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:32,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 23 [2023-08-31 04:14:32,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764702578] [2023-08-31 04:14:32,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:14:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:14:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-08-31 04:14:33,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:14:33,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1013 transitions, 20773 flow. Second operand has 23 states, 23 states have (on average 150.6086956521739) internal successors, (3464), 23 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:33,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:33,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:14:33,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:43,482 INFO L130 PetriNetUnfolder]: 6764/12674 cut-off events. [2023-08-31 04:14:43,483 INFO L131 PetriNetUnfolder]: For 375400/375400 co-relation queries the response was YES. [2023-08-31 04:14:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129965 conditions, 12674 events. 6764/12674 cut-off events. For 375400/375400 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 105771 event pairs, 549 based on Foata normal form. 252/12925 useless extension candidates. Maximal degree in co-relation 129120. Up to 5370 conditions per place. [2023-08-31 04:14:43,631 INFO L137 encePairwiseOnDemand]: 384/393 looper letters, 864 selfloop transitions, 713 changer transitions 18/1595 dead transitions. [2023-08-31 04:14:43,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1595 transitions, 33829 flow [2023-08-31 04:14:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-31 04:14:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-31 04:14:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 7281 transitions. [2023-08-31 04:14:43,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39418547994152997 [2023-08-31 04:14:43,638 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 7281 transitions. [2023-08-31 04:14:43,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 7281 transitions. [2023-08-31 04:14:43,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:43,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 7281 transitions. [2023-08-31 04:14:43,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 154.91489361702128) internal successors, (7281), 47 states have internal predecessors, (7281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:43,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 393.0) internal successors, (18864), 48 states have internal predecessors, (18864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:43,659 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 393.0) internal successors, (18864), 48 states have internal predecessors, (18864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:43,659 INFO L175 Difference]: Start difference. First operand has 326 places, 1013 transitions, 20773 flow. Second operand 47 states and 7281 transitions. [2023-08-31 04:14:43,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1595 transitions, 33829 flow [2023-08-31 04:14:45,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1595 transitions, 32376 flow, removed 548 selfloop flow, removed 7 redundant places. [2023-08-31 04:14:45,035 INFO L231 Difference]: Finished difference. Result has 386 places, 1230 transitions, 25873 flow [2023-08-31 04:14:45,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=19525, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=25873, PETRI_PLACES=386, PETRI_TRANSITIONS=1230} [2023-08-31 04:14:45,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 365 predicate places. [2023-08-31 04:14:45,036 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1230 transitions, 25873 flow [2023-08-31 04:14:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 150.6086956521739) internal successors, (3464), 23 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:45,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:45,037 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:45,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:45,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:45,238 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:45,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:45,239 INFO L85 PathProgramCache]: Analyzing trace with hash 655526104, now seen corresponding path program 16 times [2023-08-31 04:14:45,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:45,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125215148] [2023-08-31 04:14:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:45,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:45,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125215148] [2023-08-31 04:14:45,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125215148] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000204855] [2023-08-31 04:14:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:14:45,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:45,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:45,469 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:14:45,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 04:14:45,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:14:45,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:14:45,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:45,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:45,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000204855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:45,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:45,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2023-08-31 04:14:45,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953606252] [2023-08-31 04:14:45,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:45,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:14:45,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:14:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:14:46,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:14:46,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1230 transitions, 25873 flow. Second operand has 21 states, 21 states have (on average 150.66666666666666) internal successors, (3164), 21 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:46,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:46,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:14:46,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:58,939 INFO L130 PetriNetUnfolder]: 7338/13929 cut-off events. [2023-08-31 04:14:58,939 INFO L131 PetriNetUnfolder]: For 852513/852513 co-relation queries the response was YES. [2023-08-31 04:14:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172272 conditions, 13929 events. 7338/13929 cut-off events. For 852513/852513 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 119889 event pairs, 855 based on Foata normal form. 164/14092 useless extension candidates. Maximal degree in co-relation 171283. Up to 7246 conditions per place. [2023-08-31 04:14:59,236 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 897 selfloop transitions, 723 changer transitions 9/1629 dead transitions. [2023-08-31 04:14:59,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1629 transitions, 37076 flow [2023-08-31 04:14:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 04:14:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 04:14:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5421 transitions. [2023-08-31 04:14:59,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941112322791712 [2023-08-31 04:14:59,240 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5421 transitions. [2023-08-31 04:14:59,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5421 transitions. [2023-08-31 04:14:59,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:59,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5421 transitions. [2023-08-31 04:14:59,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 154.88571428571427) internal successors, (5421), 35 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:59,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 393.0) internal successors, (14148), 36 states have internal predecessors, (14148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:59,254 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 393.0) internal successors, (14148), 36 states have internal predecessors, (14148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:59,254 INFO L175 Difference]: Start difference. First operand has 386 places, 1230 transitions, 25873 flow. Second operand 35 states and 5421 transitions. [2023-08-31 04:14:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1629 transitions, 37076 flow [2023-08-31 04:15:02,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1629 transitions, 33880 flow, removed 1079 selfloop flow, removed 18 redundant places. [2023-08-31 04:15:02,844 INFO L231 Difference]: Finished difference. Result has 413 places, 1378 transitions, 28638 flow [2023-08-31 04:15:02,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=23064, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=28638, PETRI_PLACES=413, PETRI_TRANSITIONS=1378} [2023-08-31 04:15:02,846 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 392 predicate places. [2023-08-31 04:15:02,846 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1378 transitions, 28638 flow [2023-08-31 04:15:02,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.66666666666666) internal successors, (3164), 21 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:02,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:02,847 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:02,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 04:15:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:03,054 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:03,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1857081424, now seen corresponding path program 17 times [2023-08-31 04:15:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:03,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268369136] [2023-08-31 04:15:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268369136] [2023-08-31 04:15:03,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268369136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111828960] [2023-08-31 04:15:03,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:15:03,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:03,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:03,257 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:03,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 04:15:03,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:15:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:03,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 04:15:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:05,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111828960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:05,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:05,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-08-31 04:15:05,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623531174] [2023-08-31 04:15:05,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:05,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:15:05,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:15:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-08-31 04:15:06,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-31 04:15:06,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1378 transitions, 28638 flow. Second operand has 23 states, 23 states have (on average 153.6086956521739) internal successors, (3533), 23 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:06,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:06,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-31 04:15:06,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:15,098 INFO L130 PetriNetUnfolder]: 7617/14425 cut-off events. [2023-08-31 04:15:15,098 INFO L131 PetriNetUnfolder]: For 1150532/1150532 co-relation queries the response was YES. [2023-08-31 04:15:15,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192541 conditions, 14425 events. 7617/14425 cut-off events. For 1150532/1150532 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 125507 event pairs, 358 based on Foata normal form. 40/14464 useless extension candidates. Maximal degree in co-relation 191496. Up to 7432 conditions per place. [2023-08-31 04:15:15,329 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 1267 selfloop transitions, 556 changer transitions 60/1883 dead transitions. [2023-08-31 04:15:15,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1883 transitions, 41560 flow [2023-08-31 04:15:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:15:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:15:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4556 transitions. [2023-08-31 04:15:15,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997543213126261 [2023-08-31 04:15:15,334 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4556 transitions. [2023-08-31 04:15:15,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4556 transitions. [2023-08-31 04:15:15,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:15,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4556 transitions. [2023-08-31 04:15:15,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 157.10344827586206) internal successors, (4556), 29 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:15,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 393.0) internal successors, (11790), 30 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:15,349 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 393.0) internal successors, (11790), 30 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:15,349 INFO L175 Difference]: Start difference. First operand has 413 places, 1378 transitions, 28638 flow. Second operand 29 states and 4556 transitions. [2023-08-31 04:15:15,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1883 transitions, 41560 flow [2023-08-31 04:15:19,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1883 transitions, 39781 flow, removed 607 selfloop flow, removed 19 redundant places. [2023-08-31 04:15:19,694 INFO L231 Difference]: Finished difference. Result has 429 places, 1509 transitions, 31253 flow [2023-08-31 04:15:19,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=26834, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=909, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=31253, PETRI_PLACES=429, PETRI_TRANSITIONS=1509} [2023-08-31 04:15:19,696 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2023-08-31 04:15:19,696 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1509 transitions, 31253 flow [2023-08-31 04:15:19,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 153.6086956521739) internal successors, (3533), 23 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:19,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:19,697 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:19,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:19,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:19,901 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:19,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 740354776, now seen corresponding path program 18 times [2023-08-31 04:15:19,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:19,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117782478] [2023-08-31 04:15:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:20,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:20,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117782478] [2023-08-31 04:15:20,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117782478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:20,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107370939] [2023-08-31 04:15:20,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:15:20,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:20,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:20,143 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:20,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 04:15:20,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:15:20,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:20,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:15:20,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:20,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:20,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107370939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:20,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:20,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2023-08-31 04:15:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593267689] [2023-08-31 04:15:20,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:20,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:15:20,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:15:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:15:21,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:15:21,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1509 transitions, 31253 flow. Second operand has 21 states, 21 states have (on average 150.71428571428572) internal successors, (3165), 21 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:21,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:21,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:15:21,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:30,381 INFO L130 PetriNetUnfolder]: 7745/14609 cut-off events. [2023-08-31 04:15:30,381 INFO L131 PetriNetUnfolder]: For 1391655/1391655 co-relation queries the response was YES. [2023-08-31 04:15:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202036 conditions, 14609 events. 7745/14609 cut-off events. For 1391655/1391655 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 126027 event pairs, 1018 based on Foata normal form. 40/14648 useless extension candidates. Maximal degree in co-relation 200954. Up to 9815 conditions per place. [2023-08-31 04:15:30,607 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 1284 selfloop transitions, 461 changer transitions 1/1746 dead transitions. [2023-08-31 04:15:30,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1746 transitions, 39170 flow [2023-08-31 04:15:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:15:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:15:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3567 transitions. [2023-08-31 04:15:30,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39462329903750415 [2023-08-31 04:15:30,610 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3567 transitions. [2023-08-31 04:15:30,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3567 transitions. [2023-08-31 04:15:30,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:30,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3567 transitions. [2023-08-31 04:15:30,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 155.08695652173913) internal successors, (3567), 23 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,616 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 393.0) internal successors, (9432), 24 states have internal predecessors, (9432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,616 INFO L175 Difference]: Start difference. First operand has 429 places, 1509 transitions, 31253 flow. Second operand 23 states and 3567 transitions. [2023-08-31 04:15:30,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1746 transitions, 39170 flow [2023-08-31 04:15:36,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1746 transitions, 37860 flow, removed 405 selfloop flow, removed 17 redundant places. [2023-08-31 04:15:36,491 INFO L231 Difference]: Finished difference. Result has 441 places, 1568 transitions, 32829 flow [2023-08-31 04:15:36,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=30023, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1057, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=32829, PETRI_PLACES=441, PETRI_TRANSITIONS=1568} [2023-08-31 04:15:36,492 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 420 predicate places. [2023-08-31 04:15:36,492 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1568 transitions, 32829 flow [2023-08-31 04:15:36,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.71428571428572) internal successors, (3165), 21 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:36,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:36,493 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:36,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:36,693 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,SelfDestructingSolverStorable25 [2023-08-31 04:15:36,694 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:36,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:36,694 INFO L85 PathProgramCache]: Analyzing trace with hash -773225000, now seen corresponding path program 19 times [2023-08-31 04:15:36,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:36,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301465183] [2023-08-31 04:15:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:36,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:36,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301465183] [2023-08-31 04:15:36,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301465183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:36,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285321661] [2023-08-31 04:15:36,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:15:36,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:36,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:36,848 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:36,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 04:15:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:15:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285321661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:37,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2023-08-31 04:15:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30400402] [2023-08-31 04:15:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:37,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:15:37,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:15:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:15:38,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:15:38,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1568 transitions, 32829 flow. Second operand has 20 states, 20 states have (on average 150.7) internal successors, (3014), 20 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:38,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:38,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:15:38,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:58,290 WARN L222 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 95 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:16:07,118 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] [2023-08-31 04:16:32,441 WARN L222 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:16:36,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:56,149 WARN L222 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:17:05,015 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 84 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:17:08,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:17:10,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:17:12,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:17:22,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:17:29,711 INFO L130 PetriNetUnfolder]: 8137/15637 cut-off events. [2023-08-31 04:17:29,711 INFO L131 PetriNetUnfolder]: For 1390723/1390723 co-relation queries the response was YES. [2023-08-31 04:17:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212028 conditions, 15637 events. 8137/15637 cut-off events. For 1390723/1390723 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 139116 event pairs, 210 based on Foata normal form. 36/15672 useless extension candidates. Maximal degree in co-relation 210962. Up to 6407 conditions per place. [2023-08-31 04:17:29,942 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 902 selfloop transitions, 1031 changer transitions 77/2010 dead transitions. [2023-08-31 04:17:29,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2010 transitions, 44989 flow [2023-08-31 04:17:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 04:17:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 04:17:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4775 transitions. [2023-08-31 04:17:29,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3919395879504227 [2023-08-31 04:17:29,945 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4775 transitions. [2023-08-31 04:17:29,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4775 transitions. [2023-08-31 04:17:29,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:29,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4775 transitions. [2023-08-31 04:17:29,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 154.03225806451613) internal successors, (4775), 31 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:29,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 393.0) internal successors, (12576), 32 states have internal predecessors, (12576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:29,953 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 393.0) internal successors, (12576), 32 states have internal predecessors, (12576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:29,954 INFO L175 Difference]: Start difference. First operand has 441 places, 1568 transitions, 32829 flow. Second operand 31 states and 4775 transitions. [2023-08-31 04:17:29,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2010 transitions, 44989 flow [2023-08-31 04:17:35,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 2010 transitions, 44428 flow, removed 93 selfloop flow, removed 10 redundant places. [2023-08-31 04:17:35,876 INFO L231 Difference]: Finished difference. Result has 466 places, 1748 transitions, 39230 flow [2023-08-31 04:17:35,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=32276, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=39230, PETRI_PLACES=466, PETRI_TRANSITIONS=1748} [2023-08-31 04:17:35,878 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 445 predicate places. [2023-08-31 04:17:35,878 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1748 transitions, 39230 flow [2023-08-31 04:17:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 150.7) internal successors, (3014), 20 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:35,879 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:35,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:36,085 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,SelfDestructingSolverStorable26 [2023-08-31 04:17:36,085 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:36,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:36,085 INFO L85 PathProgramCache]: Analyzing trace with hash -194428736, now seen corresponding path program 20 times [2023-08-31 04:17:36,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:36,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982755289] [2023-08-31 04:17:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:36,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:36,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982755289] [2023-08-31 04:17:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982755289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950564396] [2023-08-31 04:17:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:17:36,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:36,253 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:36,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 04:17:36,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:17:36,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:17:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:17:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950564396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:36,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2023-08-31 04:17:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506576046] [2023-08-31 04:17:36,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:17:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:17:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:17:37,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:17:37,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1748 transitions, 39230 flow. Second operand has 21 states, 21 states have (on average 150.66666666666666) internal successors, (3164), 21 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:37,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:37,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:17:37,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:06,063 INFO L130 PetriNetUnfolder]: 7995/15556 cut-off events. [2023-08-31 04:18:06,063 INFO L131 PetriNetUnfolder]: For 1687138/1687138 co-relation queries the response was YES. [2023-08-31 04:18:06,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227729 conditions, 15556 events. 7995/15556 cut-off events. For 1687138/1687138 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 140031 event pairs, 264 based on Foata normal form. 28/15583 useless extension candidates. Maximal degree in co-relation 226619. Up to 6413 conditions per place. [2023-08-31 04:18:06,356 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 1064 selfloop transitions, 915 changer transitions 11/1990 dead transitions. [2023-08-31 04:18:06,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1990 transitions, 47881 flow [2023-08-31 04:18:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 04:18:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 04:18:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6315 transitions. [2023-08-31 04:18:06,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3919195680506423 [2023-08-31 04:18:06,360 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6315 transitions. [2023-08-31 04:18:06,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6315 transitions. [2023-08-31 04:18:06,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:06,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6315 transitions. [2023-08-31 04:18:06,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 154.02439024390245) internal successors, (6315), 41 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 393.0) internal successors, (16506), 42 states have internal predecessors, (16506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,373 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 393.0) internal successors, (16506), 42 states have internal predecessors, (16506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,373 INFO L175 Difference]: Start difference. First operand has 466 places, 1748 transitions, 39230 flow. Second operand 41 states and 6315 transitions. [2023-08-31 04:18:06,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1990 transitions, 47881 flow [2023-08-31 04:18:15,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1990 transitions, 46513 flow, removed 331 selfloop flow, removed 18 redundant places. [2023-08-31 04:18:15,586 INFO L231 Difference]: Finished difference. Result has 488 places, 1752 transitions, 40109 flow [2023-08-31 04:18:15,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=37545, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=40109, PETRI_PLACES=488, PETRI_TRANSITIONS=1752} [2023-08-31 04:18:15,588 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 467 predicate places. [2023-08-31 04:18:15,588 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 1752 transitions, 40109 flow [2023-08-31 04:18:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.66666666666666) internal successors, (3164), 21 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:15,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:15,589 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:15,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:15,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 04:18:15,795 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:15,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash -933925380, now seen corresponding path program 21 times [2023-08-31 04:18:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903933691] [2023-08-31 04:18:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:16,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:16,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903933691] [2023-08-31 04:18:16,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903933691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:16,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919958681] [2023-08-31 04:18:16,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:18:16,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:16,061 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:16,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 04:18:16,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 04:18:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:18:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:18:16,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919958681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:16,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2023-08-31 04:18:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475918989] [2023-08-31 04:18:16,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:18:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:18:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:18:18,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:18:18,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 1752 transitions, 40109 flow. Second operand has 21 states, 21 states have (on average 150.66666666666666) internal successors, (3164), 21 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:18,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:18,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:18:18,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:46,053 INFO L130 PetriNetUnfolder]: 8829/17446 cut-off events. [2023-08-31 04:18:46,053 INFO L131 PetriNetUnfolder]: For 1963167/1963167 co-relation queries the response was YES. [2023-08-31 04:18:46,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255774 conditions, 17446 events. 8829/17446 cut-off events. For 1963167/1963167 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 162616 event pairs, 1272 based on Foata normal form. 183/17628 useless extension candidates. Maximal degree in co-relation 254665. Up to 11347 conditions per place. [2023-08-31 04:18:46,329 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 1160 selfloop transitions, 1042 changer transitions 5/2207 dead transitions. [2023-08-31 04:18:46,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 2207 transitions, 55532 flow [2023-08-31 04:18:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:18:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:18:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5257 transitions. [2023-08-31 04:18:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934291273761413 [2023-08-31 04:18:46,332 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5257 transitions. [2023-08-31 04:18:46,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5257 transitions. [2023-08-31 04:18:46,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:46,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5257 transitions. [2023-08-31 04:18:46,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 154.61764705882354) internal successors, (5257), 34 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:46,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 393.0) internal successors, (13755), 35 states have internal predecessors, (13755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:46,341 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 393.0) internal successors, (13755), 35 states have internal predecessors, (13755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:46,342 INFO L175 Difference]: Start difference. First operand has 488 places, 1752 transitions, 40109 flow. Second operand 34 states and 5257 transitions. [2023-08-31 04:18:46,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 2207 transitions, 55532 flow [2023-08-31 04:18:56,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 2207 transitions, 54090 flow, removed 203 selfloop flow, removed 29 redundant places. [2023-08-31 04:18:56,375 INFO L231 Difference]: Finished difference. Result has 500 places, 1982 transitions, 48522 flow [2023-08-31 04:18:56,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=38829, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=48522, PETRI_PLACES=500, PETRI_TRANSITIONS=1982} [2023-08-31 04:18:56,377 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 479 predicate places. [2023-08-31 04:18:56,377 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1982 transitions, 48522 flow [2023-08-31 04:18:56,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.66666666666666) internal successors, (3164), 21 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:56,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:56,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:56,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:56,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:56,579 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:56,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash -851722484, now seen corresponding path program 22 times [2023-08-31 04:18:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:56,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997928425] [2023-08-31 04:18:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:56,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:56,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:56,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997928425] [2023-08-31 04:18:56,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997928425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:56,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830488993] [2023-08-31 04:18:56,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:18:56,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:56,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:56,765 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:56,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 04:18:56,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:18:56,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:18:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:18:56,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830488993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:57,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2023-08-31 04:18:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626504200] [2023-08-31 04:18:57,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:18:57,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:18:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:18:57,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:18:57,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1982 transitions, 48522 flow. Second operand has 21 states, 21 states have (on average 150.71428571428572) internal successors, (3165), 21 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:57,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:57,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:18:57,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:02,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 04:19:14,162 INFO L130 PetriNetUnfolder]: 9306/18363 cut-off events. [2023-08-31 04:19:14,162 INFO L131 PetriNetUnfolder]: For 2525482/2525482 co-relation queries the response was YES. [2023-08-31 04:19:14,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288419 conditions, 18363 events. 9306/18363 cut-off events. For 2525482/2525482 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 172638 event pairs, 1617 based on Foata normal form. 40/18402 useless extension candidates. Maximal degree in co-relation 287240. Up to 15570 conditions per place. [2023-08-31 04:19:14,517 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 1808 selfloop transitions, 478 changer transitions 0/2286 dead transitions. [2023-08-31 04:19:14,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 2286 transitions, 60251 flow [2023-08-31 04:19:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:19:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:19:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3718 transitions. [2023-08-31 04:19:14,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941899915182358 [2023-08-31 04:19:14,521 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3718 transitions. [2023-08-31 04:19:14,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3718 transitions. [2023-08-31 04:19:14,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:14,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3718 transitions. [2023-08-31 04:19:14,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 154.91666666666666) internal successors, (3718), 24 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:14,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:14,530 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 393.0) internal successors, (9825), 25 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:14,530 INFO L175 Difference]: Start difference. First operand has 500 places, 1982 transitions, 48522 flow. Second operand 24 states and 3718 transitions. [2023-08-31 04:19:14,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 2286 transitions, 60251 flow [2023-08-31 04:19:28,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 2286 transitions, 58860 flow, removed 510 selfloop flow, removed 14 redundant places. [2023-08-31 04:19:28,741 INFO L231 Difference]: Finished difference. Result has 519 places, 2109 transitions, 52598 flow [2023-08-31 04:19:28,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=47239, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=52598, PETRI_PLACES=519, PETRI_TRANSITIONS=2109} [2023-08-31 04:19:28,742 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 498 predicate places. [2023-08-31 04:19:28,742 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 2109 transitions, 52598 flow [2023-08-31 04:19:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 150.71428571428572) internal successors, (3165), 21 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:28,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:28,743 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:28,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:28,944 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:28,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1169475812, now seen corresponding path program 23 times [2023-08-31 04:19:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115751377] [2023-08-31 04:19:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115751377] [2023-08-31 04:19:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115751377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005929487] [2023-08-31 04:19:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:19:29,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:29,098 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:29,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 04:19:29,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:19:29,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:29,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 04:19:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:31,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005929487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:31,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:31,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-08-31 04:19:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827654689] [2023-08-31 04:19:31,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:31,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:19:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:19:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-31 04:19:32,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 393 [2023-08-31 04:19:32,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 2109 transitions, 52598 flow. Second operand has 23 states, 23 states have (on average 153.6086956521739) internal successors, (3533), 23 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:32,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:32,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 393 [2023-08-31 04:19:32,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:49,874 INFO L130 PetriNetUnfolder]: 9603/18893 cut-off events. [2023-08-31 04:19:49,875 INFO L131 PetriNetUnfolder]: For 2970162/2970162 co-relation queries the response was YES. [2023-08-31 04:19:50,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306335 conditions, 18893 events. 9603/18893 cut-off events. For 2970162/2970162 co-relation queries the response was YES. Maximal size of possible extension queue 1312. Compared 177808 event pairs, 844 based on Foata normal form. 38/18930 useless extension candidates. Maximal degree in co-relation 305106. Up to 10059 conditions per place. [2023-08-31 04:19:50,369 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 1454 selfloop transitions, 933 changer transitions 26/2413 dead transitions. [2023-08-31 04:19:50,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2413 transitions, 64577 flow [2023-08-31 04:19:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 04:19:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 04:19:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3450 transitions. [2023-08-31 04:19:50,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39902845246356694 [2023-08-31 04:19:50,372 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3450 transitions. [2023-08-31 04:19:50,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3450 transitions. [2023-08-31 04:19:50,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:50,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3450 transitions. [2023-08-31 04:19:50,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 156.8181818181818) internal successors, (3450), 22 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:50,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 393.0) internal successors, (9039), 23 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:50,378 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 393.0) internal successors, (9039), 23 states have internal predecessors, (9039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:50,378 INFO L175 Difference]: Start difference. First operand has 519 places, 2109 transitions, 52598 flow. Second operand 22 states and 3450 transitions. [2023-08-31 04:19:50,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2413 transitions, 64577 flow [2023-08-31 04:20:07,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 2413 transitions, 64049 flow, removed 109 selfloop flow, removed 11 redundant places. [2023-08-31 04:20:07,176 INFO L231 Difference]: Finished difference. Result has 535 places, 2246 transitions, 58535 flow [2023-08-31 04:20:07,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=52076, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=804, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=58535, PETRI_PLACES=535, PETRI_TRANSITIONS=2246} [2023-08-31 04:20:07,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 514 predicate places. [2023-08-31 04:20:07,179 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 2246 transitions, 58535 flow [2023-08-31 04:20:07,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 153.6086956521739) internal successors, (3533), 23 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:07,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:20:07,180 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:20:07,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 04:20:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-31 04:20:07,382 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:20:07,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:20:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1932290812, now seen corresponding path program 24 times [2023-08-31 04:20:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:20:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891726806] [2023-08-31 04:20:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:20:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:20:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:20:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:20:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:20:07,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891726806] [2023-08-31 04:20:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891726806] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:20:07,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851299108] [2023-08-31 04:20:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:20:07,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:20:07,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:20:07,649 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:20:07,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 04:20:07,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:20:07,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:20:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:20:07,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:20:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:20:07,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:20:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:20:09,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851299108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:20:09,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:20:09,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2023-08-31 04:20:09,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645435985] [2023-08-31 04:20:09,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:20:09,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:20:09,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:20:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:20:09,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:20:10,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 393 [2023-08-31 04:20:10,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 2246 transitions, 58535 flow. Second operand has 21 states, 21 states have (on average 149.66666666666666) internal successors, (3143), 21 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:10,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:20:10,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 393 [2023-08-31 04:20:10,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:20:21,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:20:23,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:20:34,812 WARN L222 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 78 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:20:36,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:21:20,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:21:34,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:21:38,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:21:47,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:21:52,031 INFO L130 PetriNetUnfolder]: 9472/18602 cut-off events. [2023-08-31 04:21:52,032 INFO L131 PetriNetUnfolder]: For 3256789/3256789 co-relation queries the response was YES. [2023-08-31 04:21:52,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314871 conditions, 18602 events. 9472/18602 cut-off events. For 3256789/3256789 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 174504 event pairs, 458 based on Foata normal form. 45/18646 useless extension candidates. Maximal degree in co-relation 313596. Up to 7374 conditions per place. [2023-08-31 04:21:52,441 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 1368 selfloop transitions, 1038 changer transitions 19/2425 dead transitions. [2023-08-31 04:21:52,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 2425 transitions, 67365 flow [2023-08-31 04:21:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:21:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:21:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4885 transitions. [2023-08-31 04:21:52,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884382951653944 [2023-08-31 04:21:52,449 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4885 transitions. [2023-08-31 04:21:52,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4885 transitions. [2023-08-31 04:21:52,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:52,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4885 transitions. [2023-08-31 04:21:52,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 152.65625) internal successors, (4885), 32 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:52,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 393.0) internal successors, (12969), 33 states have internal predecessors, (12969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:52,460 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 393.0) internal successors, (12969), 33 states have internal predecessors, (12969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:52,460 INFO L175 Difference]: Start difference. First operand has 535 places, 2246 transitions, 58535 flow. Second operand 32 states and 4885 transitions. [2023-08-31 04:21:52,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 2425 transitions, 67365 flow [2023-08-31 04:22:15,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2425 transitions, 66729 flow, removed 214 selfloop flow, removed 8 redundant places. [2023-08-31 04:22:15,290 INFO L231 Difference]: Finished difference. Result has 561 places, 2233 transitions, 60462 flow [2023-08-31 04:22:15,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=57377, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=60462, PETRI_PLACES=561, PETRI_TRANSITIONS=2233} [2023-08-31 04:22:15,295 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 540 predicate places. [2023-08-31 04:22:15,296 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2233 transitions, 60462 flow [2023-08-31 04:22:15,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 149.66666666666666) internal successors, (3143), 21 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:15,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:15,297 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:15,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:15,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 04:22:15,502 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:22:15,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1783880220, now seen corresponding path program 25 times [2023-08-31 04:22:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:15,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84496255] [2023-08-31 04:22:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:15,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:15,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84496255] [2023-08-31 04:22:15,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84496255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:22:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819109196] [2023-08-31 04:22:15,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:22:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:15,648 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:15,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 04:22:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 04:22:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:22:15,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:22:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:16,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819109196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:22:16,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:22:16,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 22 [2023-08-31 04:22:16,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926001997] [2023-08-31 04:22:16,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:22:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 04:22:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 04:22:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-31 04:22:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 393 [2023-08-31 04:22:16,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2233 transitions, 60462 flow. Second operand has 22 states, 22 states have (on average 150.63636363636363) internal successors, (3314), 22 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:16,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:16,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 393 [2023-08-31 04:22:16,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15