./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:51:20,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:51:20,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:51:20,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:51:20,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:51:20,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:51:20,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:51:20,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:51:20,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:51:20,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:51:20,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:51:20,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:51:20,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:51:20,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:51:20,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:51:20,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:51:20,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:51:20,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:51:20,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:51:20,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:51:20,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:51:20,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:51:20,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:51:20,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:51:20,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:51:20,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:51:20,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:51:20,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:51:20,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:51:20,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:51:20,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:51:20,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:51:20,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:51:20,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:51:20,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:51:20,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:51:20,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:51:20,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:51:20,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:51:20,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:51:20,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:51:20,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:51:20,682 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:51:20,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:51:20,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:51:20,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:51:20,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:51:20,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:51:20,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:51:20,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:51:20,686 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:51:20,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:51:20,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:51:20,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:51:20,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:51:20,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:51:20,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:51:20,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:51:20,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:51:20,688 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:51:20,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:51:20,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:51:20,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:51:20,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:51:20,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:51:20,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:51:20,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:51:20,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:51:20,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:51:20,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:51:20,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:51:20,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:51:20,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:51:20,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:51:20,691 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:51:20,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:51:20,691 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:51:20,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:51:20,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:51:21,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:51:21,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:51:21,006 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:51:21,006 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:51:21,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-09-01 11:51:22,355 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:51:22,550 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:51:22,551 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-09-01 11:51:22,557 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc9216e28/e41156e159b741829766a0707fd33f7c/FLAG958b929c4 [2023-09-01 11:51:22,570 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc9216e28/e41156e159b741829766a0707fd33f7c [2023-09-01 11:51:22,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:51:22,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:51:22,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:51:22,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:51:22,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:51:22,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1b1575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22, skipping insertion in model container [2023-09-01 11:51:22,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:51:22,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:51:22,740 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-09-01 11:51:22,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:51:22,765 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:51:22,789 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-09-01 11:51:22,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:51:22,806 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:51:22,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22 WrapperNode [2023-09-01 11:51:22,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:51:22,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:51:22,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:51:22,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:51:22,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,845 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 198 [2023-09-01 11:51:22,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:51:22,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:51:22,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:51:22,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:51:22,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:51:22,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:51:22,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:51:22,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:51:22,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (1/1) ... [2023-09-01 11:51:22,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:51:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:22,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 11:51:22,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 11:51:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:51:22,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:51:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:51:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:51:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 11:51:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 11:51:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 11:51:22,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 11:51:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:51:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 11:51:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:51:22,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:51:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:51:22,946 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:51:23,033 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:51:23,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:51:23,417 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:51:23,433 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:51:23,433 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 11:51:23,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:51:23 BoogieIcfgContainer [2023-09-01 11:51:23,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:51:23,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:51:23,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:51:23,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:51:23,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:51:22" (1/3) ... [2023-09-01 11:51:23,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cf5764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:51:23, skipping insertion in model container [2023-09-01 11:51:23,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:51:22" (2/3) ... [2023-09-01 11:51:23,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cf5764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:51:23, skipping insertion in model container [2023-09-01 11:51:23,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:51:23" (3/3) ... [2023-09-01 11:51:23,443 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-09-01 11:51:23,450 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:51:23,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:51:23,459 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:51:23,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:51:23,613 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:51:23,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 231 transitions, 478 flow [2023-09-01 11:51:23,793 INFO L130 PetriNetUnfolder]: 21/229 cut-off events. [2023-09-01 11:51:23,793 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:51:23,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 229 events. 21/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-09-01 11:51:23,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 231 transitions, 478 flow [2023-09-01 11:51:23,810 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 221 transitions, 454 flow [2023-09-01 11:51:23,814 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:51:23,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 454 flow [2023-09-01 11:51:23,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 454 flow [2023-09-01 11:51:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 454 flow [2023-09-01 11:51:23,893 INFO L130 PetriNetUnfolder]: 21/221 cut-off events. [2023-09-01 11:51:23,893 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:51:23,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2023-09-01 11:51:23,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-09-01 11:51:29,620 INFO L134 LiptonReduction]: Checked pairs total: 5353 [2023-09-01 11:51:29,621 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-09-01 11:51:29,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 11:51:29,638 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;@c27ebc8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:51:29,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 11:51:29,643 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-09-01 11:51:29,644 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:51:29,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:29,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:29,645 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:29,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash 659682560, now seen corresponding path program 1 times [2023-09-01 11:51:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:29,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135227586] [2023-09-01 11:51:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 11:51:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135227586] [2023-09-01 11:51:30,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135227586] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:30,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:51:30,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:51:30,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455218865] [2023-09-01 11:51:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:51:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:51:30,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:51:30,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 489 [2023-09-01 11:51:30,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:30,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 489 [2023-09-01 11:51:30,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:30,249 INFO L130 PetriNetUnfolder]: 53/98 cut-off events. [2023-09-01 11:51:30,249 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 11:51:30,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2023-09-01 11:51:30,251 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-09-01 11:51:30,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2023-09-01 11:51:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:51:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:51:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-09-01 11:51:30,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274028629856851 [2023-09-01 11:51:30,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-09-01 11:51:30,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-09-01 11:51:30,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:30,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-09-01 11:51:30,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 489.0) internal successors, (1956), 4 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,283 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 627 transitions. [2023-09-01 11:51:30,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2023-09-01 11:51:30,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 11:51:30,286 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2023-09-01 11:51:30,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2023-09-01 11:51:30,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-09-01 11:51:30,291 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2023-09-01 11:51:30,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:30,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:30,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:51:30,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:30,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1043919621, now seen corresponding path program 1 times [2023-09-01 11:51:30,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:30,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991135462] [2023-09-01 11:51:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:30,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:51:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:30,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991135462] [2023-09-01 11:51:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991135462] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:30,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674887305] [2023-09-01 11:51:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:30,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:30,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:30,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:30,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:51:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 11:51:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:51:30,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 11:51:30,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674887305] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:30,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:30,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-09-01 11:51:30,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085733928] [2023-09-01 11:51:30,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:30,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 11:51:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 11:51:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-09-01 11:51:30,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-09-01 11:51:30,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:30,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-09-01 11:51:30,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:30,931 INFO L130 PetriNetUnfolder]: 53/104 cut-off events. [2023-09-01 11:51:30,932 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 11:51:30,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2023-09-01 11:51:30,933 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-09-01 11:51:30,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2023-09-01 11:51:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:51:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:51:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1216 transitions. [2023-09-01 11:51:30,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41445126107702795 [2023-09-01 11:51:30,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1216 transitions. [2023-09-01 11:51:30,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1216 transitions. [2023-09-01 11:51:30,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:30,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1216 transitions. [2023-09-01 11:51:30,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.66666666666666) internal successors, (1216), 6 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 489.0) internal successors, (3423), 7 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,950 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1216 transitions. [2023-09-01 11:51:30,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2023-09-01 11:51:30,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:51:30,952 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2023-09-01 11:51:30,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-09-01 11:51:30,953 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-09-01 11:51:30,953 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2023-09-01 11:51:30,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.875) internal successors, (1599), 8 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:30,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:30,955 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:30,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:51:31,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:31,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:31,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1002026432, now seen corresponding path program 2 times [2023-09-01 11:51:31,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:31,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402893460] [2023-09-01 11:51:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:31,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:51:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402893460] [2023-09-01 11:51:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402893460] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659671440] [2023-09-01 11:51:31,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:51:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:31,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:31,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:51:31,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 11:51:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:31,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 11:51:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:51:31,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:51:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659671440] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:31,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:51:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:51:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698622866] [2023-09-01 11:51:31,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:51:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:51:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:51:31,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-09-01 11:51:31,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:31,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:31,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-09-01 11:51:31,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:31,624 INFO L130 PetriNetUnfolder]: 88/171 cut-off events. [2023-09-01 11:51:31,625 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 11:51:31,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 88/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 33 based on Foata normal form. 4/140 useless extension candidates. Maximal degree in co-relation 330. Up to 105 conditions per place. [2023-09-01 11:51:31,627 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 41 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-09-01 11:51:31,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 260 flow [2023-09-01 11:51:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:51:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:51:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 855 transitions. [2023-09-01 11:51:31,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371165644171779 [2023-09-01 11:51:31,632 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 855 transitions. [2023-09-01 11:51:31,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 855 transitions. [2023-09-01 11:51:31,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:31,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 855 transitions. [2023-09-01 11:51:31,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.75) internal successors, (855), 4 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:31,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:31,639 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:31,639 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 855 transitions. [2023-09-01 11:51:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 260 flow [2023-09-01 11:51:31,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 244 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:51:31,643 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2023-09-01 11:51:31,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-09-01 11:51:31,645 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-09-01 11:51:31,645 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2023-09-01 11:51:31,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:31,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:31,646 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:31,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:31,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:51:31,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:31,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 637732292, now seen corresponding path program 3 times [2023-09-01 11:51:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428010210] [2023-09-01 11:51:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:31,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:51:31,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:31,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428010210] [2023-09-01 11:51:31,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428010210] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:31,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804096002] [2023-09-01 11:51:31,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:51:31,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:31,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:32,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:32,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:51:32,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 11:51:32,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 11:51:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-09-01 11:51:32,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 11:51:32,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804096002] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:32,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 11:51:32,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-09-01 11:51:32,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637723502] [2023-09-01 11:51:32,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:32,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:51:32,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:51:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 11:51:32,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 489 [2023-09-01 11:51:32,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:32,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:32,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 489 [2023-09-01 11:51:32,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:32,290 INFO L130 PetriNetUnfolder]: 136/259 cut-off events. [2023-09-01 11:51:32,290 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 11:51:32,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 259 events. 136/259 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 831 event pairs, 60 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2023-09-01 11:51:32,292 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-09-01 11:51:32,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 304 flow [2023-09-01 11:51:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:51:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:51:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 854 transitions. [2023-09-01 11:51:32,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43660531697341515 [2023-09-01 11:51:32,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 854 transitions. [2023-09-01 11:51:32,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 854 transitions. [2023-09-01 11:51:32,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:32,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 854 transitions. [2023-09-01 11:51:32,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:32,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:32,302 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:32,302 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 854 transitions. [2023-09-01 11:51:32,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 304 flow [2023-09-01 11:51:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:51:32,305 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 150 flow [2023-09-01 11:51:32,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-09-01 11:51:32,306 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2023-09-01 11:51:32,306 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 150 flow [2023-09-01 11:51:32,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:32,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:32,307 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:32,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:32,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:32,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:32,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1056425402, now seen corresponding path program 4 times [2023-09-01 11:51:32,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:32,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514455487] [2023-09-01 11:51:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:32,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:51:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514455487] [2023-09-01 11:51:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514455487] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156064745] [2023-09-01 11:51:32,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:51:32,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:32,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:32,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:32,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:51:32,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:51:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 11:51:32,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:51:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:51:32,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156064745] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:32,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:32,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:51:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628539129] [2023-09-01 11:51:32,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:32,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:51:32,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:51:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:51:33,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 489 [2023-09-01 11:51:33,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:33,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 489 [2023-09-01 11:51:33,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:33,196 INFO L130 PetriNetUnfolder]: 136/261 cut-off events. [2023-09-01 11:51:33,196 INFO L131 PetriNetUnfolder]: For 230/230 co-relation queries the response was YES. [2023-09-01 11:51:33,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 261 events. 136/261 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 104 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 722. Up to 252 conditions per place. [2023-09-01 11:51:33,198 INFO L137 encePairwiseOnDemand]: 484/489 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-09-01 11:51:33,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 230 flow [2023-09-01 11:51:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 11:51:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 11:51:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1411 transitions. [2023-09-01 11:51:33,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41221151037101955 [2023-09-01 11:51:33,202 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1411 transitions. [2023-09-01 11:51:33,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1411 transitions. [2023-09-01 11:51:33,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:33,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1411 transitions. [2023-09-01 11:51:33,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.57142857142858) internal successors, (1411), 7 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,211 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 489.0) internal successors, (3912), 8 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,211 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 150 flow. Second operand 7 states and 1411 transitions. [2023-09-01 11:51:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 230 flow [2023-09-01 11:51:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:51:33,218 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 192 flow [2023-09-01 11:51:33,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-09-01 11:51:33,220 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-09-01 11:51:33,221 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 192 flow [2023-09-01 11:51:33,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.15384615384616) internal successors, (2589), 13 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:33,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:33,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:33,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:33,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:33,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash -871821335, now seen corresponding path program 5 times [2023-09-01 11:51:33,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046987092] [2023-09-01 11:51:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:33,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:33,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046987092] [2023-09-01 11:51:33,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046987092] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:33,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:51:33,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:51:33,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693323486] [2023-09-01 11:51:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:33,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:51:33,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:51:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:51:33,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-09-01 11:51:33,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:33,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-09-01 11:51:33,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:33,822 INFO L130 PetriNetUnfolder]: 158/299 cut-off events. [2023-09-01 11:51:33,822 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-09-01 11:51:33,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 299 events. 158/299 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1083 event pairs, 18 based on Foata normal form. 16/297 useless extension candidates. Maximal degree in co-relation 778. Up to 246 conditions per place. [2023-09-01 11:51:33,824 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-09-01 11:51:33,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 352 flow [2023-09-01 11:51:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:51:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:51:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 846 transitions. [2023-09-01 11:51:33,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325153374233129 [2023-09-01 11:51:33,827 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 846 transitions. [2023-09-01 11:51:33,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 846 transitions. [2023-09-01 11:51:33,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:33,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 846 transitions. [2023-09-01 11:51:33,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,833 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,833 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 192 flow. Second operand 4 states and 846 transitions. [2023-09-01 11:51:33,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 352 flow [2023-09-01 11:51:33,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 11:51:33,836 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 199 flow [2023-09-01 11:51:33,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-09-01 11:51:33,837 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-09-01 11:51:33,837 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 199 flow [2023-09-01 11:51:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:33,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:33,838 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:33,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 11:51:33,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:33,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash -29914819, now seen corresponding path program 6 times [2023-09-01 11:51:33,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:33,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915435910] [2023-09-01 11:51:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:34,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915435910] [2023-09-01 11:51:34,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915435910] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:34,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:51:34,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:51:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024437663] [2023-09-01 11:51:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:51:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:51:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:51:34,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-09-01 11:51:34,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:34,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-09-01 11:51:34,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:34,168 INFO L130 PetriNetUnfolder]: 160/299 cut-off events. [2023-09-01 11:51:34,168 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-09-01 11:51:34,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 299 events. 160/299 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 976 event pairs, 34 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 872. Up to 206 conditions per place. [2023-09-01 11:51:34,170 INFO L137 encePairwiseOnDemand]: 483/489 looper letters, 45 selfloop transitions, 6 changer transitions 1/52 dead transitions. [2023-09-01 11:51:34,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 367 flow [2023-09-01 11:51:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:51:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:51:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 845 transitions. [2023-09-01 11:51:34,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320040899795501 [2023-09-01 11:51:34,173 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 845 transitions. [2023-09-01 11:51:34,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 845 transitions. [2023-09-01 11:51:34,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:34,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 845 transitions. [2023-09-01 11:51:34,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,180 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,180 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 199 flow. Second operand 4 states and 845 transitions. [2023-09-01 11:51:34,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 367 flow [2023-09-01 11:51:34,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 11:51:34,182 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 234 flow [2023-09-01 11:51:34,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-09-01 11:51:34,183 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-09-01 11:51:34,183 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 234 flow [2023-09-01 11:51:34,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:34,184 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:34,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 11:51:34,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:34,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash 537168199, now seen corresponding path program 1 times [2023-09-01 11:51:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779988790] [2023-09-01 11:51:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:34,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 11:51:34,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:34,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779988790] [2023-09-01 11:51:34,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779988790] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:34,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:51:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:51:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688603674] [2023-09-01 11:51:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:51:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:51:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:51:34,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 489 [2023-09-01 11:51:34,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:34,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 489 [2023-09-01 11:51:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:34,597 INFO L130 PetriNetUnfolder]: 145/270 cut-off events. [2023-09-01 11:51:34,597 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2023-09-01 11:51:34,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 270 events. 145/270 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 847 event pairs, 54 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 847. Up to 182 conditions per place. [2023-09-01 11:51:34,599 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 46 selfloop transitions, 6 changer transitions 3/55 dead transitions. [2023-09-01 11:51:34,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 415 flow [2023-09-01 11:51:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:51:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:51:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-09-01 11:51:34,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340490797546012 [2023-09-01 11:51:34,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-09-01 11:51:34,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-09-01 11:51:34,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:34,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-09-01 11:51:34,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,610 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,610 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 234 flow. Second operand 4 states and 849 transitions. [2023-09-01 11:51:34,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 415 flow [2023-09-01 11:51:34,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 408 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:51:34,614 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 257 flow [2023-09-01 11:51:34,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-09-01 11:51:34,616 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-09-01 11:51:34,616 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 257 flow [2023-09-01 11:51:34,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:34,616 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:51:34,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:34,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1727705847, now seen corresponding path program 1 times [2023-09-01 11:51:34,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:34,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701894491] [2023-09-01 11:51:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:34,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 11:51:34,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:34,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701894491] [2023-09-01 11:51:34,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701894491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:51:34,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:51:34,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 11:51:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000190392] [2023-09-01 11:51:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:51:34,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 11:51:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 11:51:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 11:51:34,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 489 [2023-09-01 11:51:34,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:34,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:34,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 489 [2023-09-01 11:51:34,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:35,027 INFO L130 PetriNetUnfolder]: 125/230 cut-off events. [2023-09-01 11:51:35,027 INFO L131 PetriNetUnfolder]: For 663/663 co-relation queries the response was YES. [2023-09-01 11:51:35,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 230 events. 125/230 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 639 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 757. Up to 177 conditions per place. [2023-09-01 11:51:35,029 INFO L137 encePairwiseOnDemand]: 485/489 looper letters, 47 selfloop transitions, 7 changer transitions 1/55 dead transitions. [2023-09-01 11:51:35,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 439 flow [2023-09-01 11:51:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 11:51:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 11:51:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 845 transitions. [2023-09-01 11:51:35,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320040899795501 [2023-09-01 11:51:35,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 845 transitions. [2023-09-01 11:51:35,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 845 transitions. [2023-09-01 11:51:35,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:35,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 845 transitions. [2023-09-01 11:51:35,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.25) internal successors, (845), 4 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,037 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 489.0) internal successors, (2445), 5 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,037 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 257 flow. Second operand 4 states and 845 transitions. [2023-09-01 11:51:35,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 439 flow [2023-09-01 11:51:35,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 413 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 11:51:35,040 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 270 flow [2023-09-01 11:51:35,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-09-01 11:51:35,040 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-09-01 11:51:35,040 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 270 flow [2023-09-01 11:51:35,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:35,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:35,041 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:51:35,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:35,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1304321571, now seen corresponding path program 1 times [2023-09-01 11:51:35,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:35,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756718808] [2023-09-01 11:51:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:35,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:36,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:36,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756718808] [2023-09-01 11:51:36,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756718808] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:36,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041864956] [2023-09-01 11:51:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:36,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:36,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:36,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:36,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:51:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:51:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:36,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:36,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:51:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:37,249 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:51:37,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 50 [2023-09-01 11:51:37,287 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:51:37,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:51:37,292 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:51:37,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:51:37,297 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:51:37,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:51:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041864956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:37,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:37,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-09-01 11:51:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127650213] [2023-09-01 11:51:37,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:51:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:51:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:51:38,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:51:38,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 270 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:38,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:38,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:51:38,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:39,997 INFO L130 PetriNetUnfolder]: 233/427 cut-off events. [2023-09-01 11:51:39,997 INFO L131 PetriNetUnfolder]: For 1029/1029 co-relation queries the response was YES. [2023-09-01 11:51:39,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 427 events. 233/427 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1621 event pairs, 12 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1404. Up to 150 conditions per place. [2023-09-01 11:51:40,001 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 71 selfloop transitions, 26 changer transitions 14/111 dead transitions. [2023-09-01 11:51:40,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 796 flow [2023-09-01 11:51:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:51:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:51:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2745 transitions. [2023-09-01 11:51:40,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-09-01 11:51:40,008 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2745 transitions. [2023-09-01 11:51:40,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2745 transitions. [2023-09-01 11:51:40,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:40,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2745 transitions. [2023-09-01 11:51:40,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.0) internal successors, (2745), 15 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:40,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:40,025 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:40,025 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 270 flow. Second operand 15 states and 2745 transitions. [2023-09-01 11:51:40,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 796 flow [2023-09-01 11:51:40,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 111 transitions, 744 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 11:51:40,029 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 451 flow [2023-09-01 11:51:40,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-09-01 11:51:40,030 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2023-09-01 11:51:40,030 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 451 flow [2023-09-01 11:51:40,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:40,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:40,032 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:40,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:40,238 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,SelfDestructingSolverStorable9 [2023-09-01 11:51:40,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:40,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:40,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1278507897, now seen corresponding path program 2 times [2023-09-01 11:51:40,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:40,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471899162] [2023-09-01 11:51:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:40,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:41,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471899162] [2023-09-01 11:51:41,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471899162] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361257577] [2023-09-01 11:51:41,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:51:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:41,185 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:41,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:51:41,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:51:41,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:51:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:41,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:41,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:51:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:41,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:42,018 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-09-01 11:51:42,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 103 [2023-09-01 11:51:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361257577] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:42,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:42,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-09-01 11:51:42,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059037748] [2023-09-01 11:51:42,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:42,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:51:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:51:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:51:43,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:51:43,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 451 flow. Second operand has 24 states, 24 states have (on average 180.04166666666666) internal successors, (4321), 24 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:43,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:43,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:51:43,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:44,148 INFO L130 PetriNetUnfolder]: 268/482 cut-off events. [2023-09-01 11:51:44,148 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-09-01 11:51:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 482 events. 268/482 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1861 event pairs, 34 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 1958. Up to 327 conditions per place. [2023-09-01 11:51:44,152 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 64 selfloop transitions, 33 changer transitions 4/101 dead transitions. [2023-09-01 11:51:44,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 891 flow [2023-09-01 11:51:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:51:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:51:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2560 transitions. [2023-09-01 11:51:44,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37394098743792 [2023-09-01 11:51:44,159 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2560 transitions. [2023-09-01 11:51:44,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2560 transitions. [2023-09-01 11:51:44,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:44,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2560 transitions. [2023-09-01 11:51:44,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 182.85714285714286) internal successors, (2560), 14 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:44,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:44,175 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:44,175 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 451 flow. Second operand 14 states and 2560 transitions. [2023-09-01 11:51:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 891 flow [2023-09-01 11:51:44,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 827 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-09-01 11:51:44,184 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 645 flow [2023-09-01 11:51:44,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-09-01 11:51:44,185 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2023-09-01 11:51:44,185 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 645 flow [2023-09-01 11:51:44,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 180.04166666666666) internal successors, (4321), 24 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:44,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:44,187 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:44,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:44,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:44,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:44,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1488168775, now seen corresponding path program 3 times [2023-09-01 11:51:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:44,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547214562] [2023-09-01 11:51:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:51:45,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:45,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547214562] [2023-09-01 11:51:45,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547214562] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:45,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988242192] [2023-09-01 11:51:45,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:51:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:45,829 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:45,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 11:51:46,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:51:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:51:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:46,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:46,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:51:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:46,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:51:47,078 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:51:47,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-09-01 11:51:47,117 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:51:47,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:51:47,122 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:51:47,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:51:47,126 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:51:47,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:51:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988242192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:51:47,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:51:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 30 [2023-09-01 11:51:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152694083] [2023-09-01 11:51:47,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:51:47,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:51:47,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:51:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:51:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-09-01 11:51:48,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 489 [2023-09-01 11:51:48,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 645 flow. Second operand has 31 states, 31 states have (on average 166.90322580645162) internal successors, (5174), 31 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:48,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:51:48,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 489 [2023-09-01 11:51:48,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:51:50,644 INFO L130 PetriNetUnfolder]: 597/1061 cut-off events. [2023-09-01 11:51:50,644 INFO L131 PetriNetUnfolder]: For 3820/3820 co-relation queries the response was YES. [2023-09-01 11:51:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4645 conditions, 1061 events. 597/1061 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5128 event pairs, 76 based on Foata normal form. 2/1063 useless extension candidates. Maximal degree in co-relation 4550. Up to 364 conditions per place. [2023-09-01 11:51:50,653 INFO L137 encePairwiseOnDemand]: 474/489 looper letters, 127 selfloop transitions, 84 changer transitions 4/215 dead transitions. [2023-09-01 11:51:50,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 215 transitions, 2100 flow [2023-09-01 11:51:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 11:51:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 11:51:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4751 transitions. [2023-09-01 11:51:50,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469909436167105 [2023-09-01 11:51:50,665 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4751 transitions. [2023-09-01 11:51:50,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4751 transitions. [2023-09-01 11:51:50,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:51:50,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4751 transitions. [2023-09-01 11:51:50,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 169.67857142857142) internal successors, (4751), 28 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:50,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:50,693 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:50,693 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 645 flow. Second operand 28 states and 4751 transitions. [2023-09-01 11:51:50,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 215 transitions, 2100 flow [2023-09-01 11:51:50,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 1914 flow, removed 66 selfloop flow, removed 5 redundant places. [2023-09-01 11:51:50,710 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1312 flow [2023-09-01 11:51:50,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1312, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2023-09-01 11:51:50,711 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 93 predicate places. [2023-09-01 11:51:50,711 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1312 flow [2023-09-01 11:51:50,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 166.90322580645162) internal successors, (5174), 31 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:51:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:51:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:51:50,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 11:51:50,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:50,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:51:50,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:51:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1380522979, now seen corresponding path program 4 times [2023-09-01 11:51:50,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:51:50,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875357184] [2023-09-01 11:51:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:51:50,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:51:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:51:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:51,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:51:51,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875357184] [2023-09-01 11:51:51,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875357184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:51:51,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118994031] [2023-09-01 11:51:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:51:51,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:51:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:51:51,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:51:51,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 11:51:51,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:51:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:51:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:51:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:51:51,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:51:51,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-09-01 11:51:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:51:51,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:52:30,527 WARN L222 SmtUtils]: Spent 38.12s on a formula simplification. DAG size of input: 44 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 11:52:30,589 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:52:30,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:52:30,637 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:52:30,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-09-01 11:52:30,643 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:52:30,651 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:52:30,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:52:30,658 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:52:30,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:52:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:52:30,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118994031] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:52:30,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:52:30,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-09-01 11:52:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473814317] [2023-09-01 11:52:30,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:52:30,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 11:52:30,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:52:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 11:52:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-09-01 11:52:32,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:34,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:36,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:38,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:40,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:42,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:44,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:46,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:49,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:51,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:53,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:55,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:57,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:52:59,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:01,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:03,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:05,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:07,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:09,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:11,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:53:11,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 489 [2023-09-01 11:53:11,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1312 flow. Second operand has 27 states, 27 states have (on average 168.14814814814815) internal successors, (4540), 27 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:11,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:11,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 489 [2023-09-01 11:53:11,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:12,230 INFO L130 PetriNetUnfolder]: 663/1177 cut-off events. [2023-09-01 11:53:12,231 INFO L131 PetriNetUnfolder]: For 4665/4665 co-relation queries the response was YES. [2023-09-01 11:53:12,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 1177 events. 663/1177 cut-off events. For 4665/4665 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5827 event pairs, 110 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 5335. Up to 822 conditions per place. [2023-09-01 11:53:12,243 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 94 selfloop transitions, 64 changer transitions 3/161 dead transitions. [2023-09-01 11:53:12,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1844 flow [2023-09-01 11:53:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:53:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:53:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2057 transitions. [2023-09-01 11:53:12,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3505453306066803 [2023-09-01 11:53:12,250 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2057 transitions. [2023-09-01 11:53:12,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2057 transitions. [2023-09-01 11:53:12,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:12,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2057 transitions. [2023-09-01 11:53:12,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 171.41666666666666) internal successors, (2057), 12 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:12,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:12,263 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:12,263 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1312 flow. Second operand 12 states and 2057 transitions. [2023-09-01 11:53:12,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1844 flow [2023-09-01 11:53:12,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1712 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-09-01 11:53:12,300 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1486 flow [2023-09-01 11:53:12,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1486, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2023-09-01 11:53:12,301 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 96 predicate places. [2023-09-01 11:53:12,301 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1486 flow [2023-09-01 11:53:12,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 168.14814814814815) internal successors, (4540), 27 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:12,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:12,303 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:12,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:12,509 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,SelfDestructingSolverStorable12 [2023-09-01 11:53:12,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:12,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1922354213, now seen corresponding path program 5 times [2023-09-01 11:53:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211744809] [2023-09-01 11:53:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:12,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 11:53:13,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211744809] [2023-09-01 11:53:13,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211744809] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607319283] [2023-09-01 11:53:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:53:13,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:13,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:13,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:13,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 11:53:14,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:53:14,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:14,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:14,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-09-01 11:53:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:14,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:15,250 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:53:15,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-09-01 11:53:15,280 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:15,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:53:15,284 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:15,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:53:15,288 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:15,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:53:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:15,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607319283] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:15,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:15,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 29 [2023-09-01 11:53:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304174213] [2023-09-01 11:53:15,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:15,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 11:53:15,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 11:53:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2023-09-01 11:53:17,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 489 [2023-09-01 11:53:17,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1486 flow. Second operand has 30 states, 30 states have (on average 170.93333333333334) internal successors, (5128), 30 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:17,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:17,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 489 [2023-09-01 11:53:17,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:19,188 INFO L130 PetriNetUnfolder]: 773/1371 cut-off events. [2023-09-01 11:53:19,188 INFO L131 PetriNetUnfolder]: For 6859/6859 co-relation queries the response was YES. [2023-09-01 11:53:19,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1371 events. 773/1371 cut-off events. For 6859/6859 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7182 event pairs, 135 based on Foata normal form. 4/1355 useless extension candidates. Maximal degree in co-relation 6711. Up to 932 conditions per place. [2023-09-01 11:53:19,201 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 103 selfloop transitions, 78 changer transitions 3/184 dead transitions. [2023-09-01 11:53:19,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 2145 flow [2023-09-01 11:53:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:53:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:53:19,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2604 transitions. [2023-09-01 11:53:19,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501022494887524 [2023-09-01 11:53:19,206 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2604 transitions. [2023-09-01 11:53:19,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2604 transitions. [2023-09-01 11:53:19,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:19,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2604 transitions. [2023-09-01 11:53:19,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 173.6) internal successors, (2604), 15 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:19,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:19,220 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:19,220 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1486 flow. Second operand 15 states and 2604 transitions. [2023-09-01 11:53:19,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 2145 flow [2023-09-01 11:53:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 2011 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-09-01 11:53:19,246 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1780 flow [2023-09-01 11:53:19,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1780, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2023-09-01 11:53:19,247 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-09-01 11:53:19,248 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1780 flow [2023-09-01 11:53:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 170.93333333333334) internal successors, (5128), 30 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:19,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:19,249 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:19,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:19,459 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,SelfDestructingSolverStorable13 [2023-09-01 11:53:19,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:19,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1976346153, now seen corresponding path program 6 times [2023-09-01 11:53:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:19,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431646949] [2023-09-01 11:53:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:19,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431646949] [2023-09-01 11:53:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431646949] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296985792] [2023-09-01 11:53:20,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:53:20,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:20,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:20,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 11:53:20,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:53:20,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:20,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:20,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:20,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:21,371 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:53:21,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-09-01 11:53:21,411 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:21,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:53:21,415 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:21,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:53:21,419 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:21,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 1 [2023-09-01 11:53:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296985792] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:21,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-09-01 11:53:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222259491] [2023-09-01 11:53:21,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:21,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:53:21,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:53:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:53:22,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:53:22,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1780 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:22,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:22,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:53:22,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:23,655 INFO L130 PetriNetUnfolder]: 785/1401 cut-off events. [2023-09-01 11:53:23,655 INFO L131 PetriNetUnfolder]: For 8388/8388 co-relation queries the response was YES. [2023-09-01 11:53:23,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1401 events. 785/1401 cut-off events. For 8388/8388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7407 event pairs, 138 based on Foata normal form. 2/1383 useless extension candidates. Maximal degree in co-relation 7451. Up to 1016 conditions per place. [2023-09-01 11:53:23,669 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 115 selfloop transitions, 73 changer transitions 4/192 dead transitions. [2023-09-01 11:53:23,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 2402 flow [2023-09-01 11:53:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:53:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:53:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2562 transitions. [2023-09-01 11:53:23,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-09-01 11:53:23,674 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2562 transitions. [2023-09-01 11:53:23,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2562 transitions. [2023-09-01 11:53:23,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:23,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2562 transitions. [2023-09-01 11:53:23,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.0) internal successors, (2562), 14 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:23,685 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1780 flow. Second operand 14 states and 2562 transitions. [2023-09-01 11:53:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 2402 flow [2023-09-01 11:53:23,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2261 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-09-01 11:53:23,717 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1912 flow [2023-09-01 11:53:23,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1912, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2023-09-01 11:53:23,718 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 121 predicate places. [2023-09-01 11:53:23,718 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1912 flow [2023-09-01 11:53:23,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:23,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:23,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:23,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:23,926 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,SelfDestructingSolverStorable14 [2023-09-01 11:53:23,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:23,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1457835971, now seen corresponding path program 7 times [2023-09-01 11:53:23,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:23,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989791426] [2023-09-01 11:53:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:23,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:24,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989791426] [2023-09-01 11:53:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989791426] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:24,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904360182] [2023-09-01 11:53:24,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:53:24,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:24,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:24,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:24,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 11:53:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:24,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:25,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:25,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:25,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:25,630 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-09-01 11:53:25,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 99 [2023-09-01 11:53:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904360182] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:25,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-09-01 11:53:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816230088] [2023-09-01 11:53:25,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:25,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:53:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:53:25,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:53:26,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 489 [2023-09-01 11:53:26,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1912 flow. Second operand has 24 states, 24 states have (on average 178.04166666666666) internal successors, (4273), 24 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:26,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:26,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 489 [2023-09-01 11:53:26,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:27,809 INFO L130 PetriNetUnfolder]: 775/1409 cut-off events. [2023-09-01 11:53:27,809 INFO L131 PetriNetUnfolder]: For 8753/8753 co-relation queries the response was YES. [2023-09-01 11:53:27,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7611 conditions, 1409 events. 775/1409 cut-off events. For 8753/8753 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7619 event pairs, 152 based on Foata normal form. 14/1403 useless extension candidates. Maximal degree in co-relation 7489. Up to 1060 conditions per place. [2023-09-01 11:53:27,823 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 104 selfloop transitions, 70 changer transitions 6/180 dead transitions. [2023-09-01 11:53:27,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 180 transitions, 2378 flow [2023-09-01 11:53:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:53:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:53:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2352 transitions. [2023-09-01 11:53:27,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699858423784804 [2023-09-01 11:53:27,828 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2352 transitions. [2023-09-01 11:53:27,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2352 transitions. [2023-09-01 11:53:27,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:27,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2352 transitions. [2023-09-01 11:53:27,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 180.92307692307693) internal successors, (2352), 13 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:27,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:27,837 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:27,837 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1912 flow. Second operand 13 states and 2352 transitions. [2023-09-01 11:53:27,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 180 transitions, 2378 flow [2023-09-01 11:53:27,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 2278 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-09-01 11:53:27,866 INFO L231 Difference]: Finished difference. Result has 150 places, 162 transitions, 1985 flow [2023-09-01 11:53:27,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1985, PETRI_PLACES=150, PETRI_TRANSITIONS=162} [2023-09-01 11:53:27,866 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 127 predicate places. [2023-09-01 11:53:27,866 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 162 transitions, 1985 flow [2023-09-01 11:53:27,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 178.04166666666666) internal successors, (4273), 24 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:27,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:27,867 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:27,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:28,080 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,SelfDestructingSolverStorable15 [2023-09-01 11:53:28,080 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:28,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2030000009, now seen corresponding path program 8 times [2023-09-01 11:53:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:28,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866353720] [2023-09-01 11:53:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:28,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866353720] [2023-09-01 11:53:28,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866353720] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108616264] [2023-09-01 11:53:28,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:53:28,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:28,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:28,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:28,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 11:53:28,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:53:28,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:29,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:29,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:29,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:29,669 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:53:29,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:53:29,716 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:53:29,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-09-01 11:53:29,732 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:29,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:29,739 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:29,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:29,742 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:53:29,749 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:29,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108616264] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:29,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-09-01 11:53:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147019869] [2023-09-01 11:53:29,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:53:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:53:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:53:30,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:53:30,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 162 transitions, 1985 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:30,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:30,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:53:30,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:31,348 INFO L130 PetriNetUnfolder]: 807/1457 cut-off events. [2023-09-01 11:53:31,348 INFO L131 PetriNetUnfolder]: For 9801/9801 co-relation queries the response was YES. [2023-09-01 11:53:31,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8273 conditions, 1457 events. 807/1457 cut-off events. For 9801/9801 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7893 event pairs, 166 based on Foata normal form. 2/1439 useless extension candidates. Maximal degree in co-relation 8149. Up to 1124 conditions per place. [2023-09-01 11:53:31,372 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 120 selfloop transitions, 65 changer transitions 2/187 dead transitions. [2023-09-01 11:53:31,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 187 transitions, 2556 flow [2023-09-01 11:53:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:53:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:53:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2194 transitions. [2023-09-01 11:53:31,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37389229720518063 [2023-09-01 11:53:31,375 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2194 transitions. [2023-09-01 11:53:31,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2194 transitions. [2023-09-01 11:53:31,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:31,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2194 transitions. [2023-09-01 11:53:31,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.83333333333334) internal successors, (2194), 12 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:31,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:31,384 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:31,384 INFO L175 Difference]: Start difference. First operand has 150 places, 162 transitions, 1985 flow. Second operand 12 states and 2194 transitions. [2023-09-01 11:53:31,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 187 transitions, 2556 flow [2023-09-01 11:53:31,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 2405 flow, removed 4 selfloop flow, removed 12 redundant places. [2023-09-01 11:53:31,419 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2111 flow [2023-09-01 11:53:31,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2111, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2023-09-01 11:53:31,420 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 129 predicate places. [2023-09-01 11:53:31,420 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2111 flow [2023-09-01 11:53:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:31,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:31,421 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:31,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:31,627 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,SelfDestructingSolverStorable16 [2023-09-01 11:53:31,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:31,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1391226607, now seen corresponding path program 9 times [2023-09-01 11:53:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:31,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392386143] [2023-09-01 11:53:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:32,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392386143] [2023-09-01 11:53:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392386143] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570021015] [2023-09-01 11:53:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:53:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:32,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:32,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 11:53:32,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:53:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:32,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:32,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:32,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-09-01 11:53:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:32,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:33,182 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:53:33,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:53:33,213 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:53:33,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-09-01 11:53:33,222 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:33,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:33,228 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:33,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:33,235 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:53:33,243 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:33,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:33,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570021015] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:33,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:33,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-09-01 11:53:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695393825] [2023-09-01 11:53:33,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:33,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:53:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:53:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:53:33,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:53:33,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2111 flow. Second operand has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:33,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:33,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:53:33,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:34,703 INFO L130 PetriNetUnfolder]: 819/1487 cut-off events. [2023-09-01 11:53:34,703 INFO L131 PetriNetUnfolder]: For 11128/11128 co-relation queries the response was YES. [2023-09-01 11:53:34,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 1487 events. 819/1487 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8161 event pairs, 172 based on Foata normal form. 2/1469 useless extension candidates. Maximal degree in co-relation 8429. Up to 1102 conditions per place. [2023-09-01 11:53:34,715 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 121 selfloop transitions, 68 changer transitions 5/194 dead transitions. [2023-09-01 11:53:34,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 194 transitions, 2650 flow [2023-09-01 11:53:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:53:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:53:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2379 transitions. [2023-09-01 11:53:34,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37423312883435583 [2023-09-01 11:53:34,719 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2379 transitions. [2023-09-01 11:53:34,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2379 transitions. [2023-09-01 11:53:34,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:34,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2379 transitions. [2023-09-01 11:53:34,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 183.0) internal successors, (2379), 13 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:34,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:34,727 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:34,727 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2111 flow. Second operand 13 states and 2379 transitions. [2023-09-01 11:53:34,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 194 transitions, 2650 flow [2023-09-01 11:53:34,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 194 transitions, 2569 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-09-01 11:53:34,761 INFO L231 Difference]: Finished difference. Result has 160 places, 170 transitions, 2214 flow [2023-09-01 11:53:34,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2214, PETRI_PLACES=160, PETRI_TRANSITIONS=170} [2023-09-01 11:53:34,761 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2023-09-01 11:53:34,762 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 170 transitions, 2214 flow [2023-09-01 11:53:34,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 180.13636363636363) internal successors, (3963), 22 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:34,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:34,763 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:34,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:34,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 11:53:34,968 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:34,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1193323809, now seen corresponding path program 10 times [2023-09-01 11:53:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022624112] [2023-09-01 11:53:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:35,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:35,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022624112] [2023-09-01 11:53:35,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022624112] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825312601] [2023-09-01 11:53:35,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:53:35,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:35,628 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:35,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 11:53:35,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:53:35,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:35,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:35,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:35,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:35,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:35,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:36,448 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:53:36,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:53:36,483 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:53:36,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-09-01 11:53:36,492 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:36,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:36,498 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:36,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:36,500 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:53:36,516 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:53:36,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:53:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:36,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825312601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:36,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:36,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-09-01 11:53:36,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114628855] [2023-09-01 11:53:36,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:36,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:53:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:53:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:53:37,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:53:37,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 170 transitions, 2214 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:37,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:37,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:53:37,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:38,834 INFO L130 PetriNetUnfolder]: 871/1589 cut-off events. [2023-09-01 11:53:38,834 INFO L131 PetriNetUnfolder]: For 14009/14009 co-relation queries the response was YES. [2023-09-01 11:53:38,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9591 conditions, 1589 events. 871/1589 cut-off events. For 14009/14009 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8944 event pairs, 275 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 9463. Up to 1242 conditions per place. [2023-09-01 11:53:38,852 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 159 selfloop transitions, 46 changer transitions 5/210 dead transitions. [2023-09-01 11:53:38,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 210 transitions, 3038 flow [2023-09-01 11:53:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:53:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:53:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2198 transitions. [2023-09-01 11:53:38,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37457396046353103 [2023-09-01 11:53:38,858 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2198 transitions. [2023-09-01 11:53:38,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2198 transitions. [2023-09-01 11:53:38,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:38,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2198 transitions. [2023-09-01 11:53:38,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.16666666666666) internal successors, (2198), 12 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:38,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:38,869 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:38,869 INFO L175 Difference]: Start difference. First operand has 160 places, 170 transitions, 2214 flow. Second operand 12 states and 2198 transitions. [2023-09-01 11:53:38,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 210 transitions, 3038 flow [2023-09-01 11:53:38,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 210 transitions, 2865 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-09-01 11:53:38,912 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 2406 flow [2023-09-01 11:53:38,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2406, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2023-09-01 11:53:38,913 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2023-09-01 11:53:38,913 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 2406 flow [2023-09-01 11:53:38,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:38,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:38,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:38,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:39,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:39,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:39,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:39,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402759, now seen corresponding path program 11 times [2023-09-01 11:53:39,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:39,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413255780] [2023-09-01 11:53:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:39,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 11:53:40,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413255780] [2023-09-01 11:53:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413255780] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752976888] [2023-09-01 11:53:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:53:40,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:40,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:40,557 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:40,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 11:53:40,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:53:40,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 63 conjunts are in the unsatisfiable core [2023-09-01 11:53:40,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:41,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:41,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:41,095 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:53:41,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-09-01 11:53:41,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:41,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:41,718 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (< c_~result_5~0 0)) (.cse1 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))))) (.cse0 (< 0 c_~result_5~0))) (and (or (and (or .cse0 .cse1) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse2 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse2 .cse3) (= .cse2 .cse3)))))) .cse5) (or (= c_~result_5~0 0) (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse7 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset)) (.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse6 .cse7) (< .cse7 .cse6))))) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse9 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset)))) .cse5) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset)))) .cse0))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 5) .cse1) (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset)) (.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse11 .cse12) (= .cse12 .cse11))))) .cse0))) is different from false [2023-09-01 11:53:41,810 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~o_2~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (let ((.cse2 (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse0)) (.cse6 (< .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse8 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (= (select (select .cse15 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)))))) (and (or (= .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (and (or (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse1 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)))) .cse2) (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse4 (select (select .cse5 c_~o_2~0.base) c_~o_2~0.offset)) (.cse3 (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse3 .cse4) (< .cse4 .cse3))))) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (< (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) .cse8) (or .cse6 (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse10 (select (select .cse11 c_~o_2~0.base) c_~o_2~0.offset)) (.cse9 (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9)))))) (or .cse2 (and (forall ((v_ArrVal_1150 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1150))) (let ((.cse12 (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset)) (.cse13 (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse12 .cse13) (= .cse12 .cse13))))) (or .cse6 .cse8)))))) is different from false [2023-09-01 11:53:41,894 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-09-01 11:53:41,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 322 treesize of output 263 [2023-09-01 11:53:41,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:41,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 207 [2023-09-01 11:53:41,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:41,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 199 [2023-09-01 11:53:41,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:41,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 183 [2023-09-01 11:53:42,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:42,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2023-09-01 11:53:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:42,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-09-01 11:53:42,659 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-09-01 11:53:42,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 1 [2023-09-01 11:53:42,679 INFO L321 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-09-01 11:53:42,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 1 [2023-09-01 11:53:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752976888] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:42,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:42,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 38 [2023-09-01 11:53:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830218007] [2023-09-01 11:53:42,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:42,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 11:53:42,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 11:53:42,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1260, Unknown=2, NotChecked=146, Total=1560 [2023-09-01 11:53:43,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 489 [2023-09-01 11:53:43,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 2406 flow. Second operand has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:43,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:43,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 489 [2023-09-01 11:53:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:45,671 INFO L130 PetriNetUnfolder]: 1013/1857 cut-off events. [2023-09-01 11:53:45,671 INFO L131 PetriNetUnfolder]: For 18945/18945 co-relation queries the response was YES. [2023-09-01 11:53:45,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11467 conditions, 1857 events. 1013/1857 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10909 event pairs, 116 based on Foata normal form. 12/1869 useless extension candidates. Maximal degree in co-relation 11337. Up to 508 conditions per place. [2023-09-01 11:53:45,683 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 125 selfloop transitions, 115 changer transitions 18/258 dead transitions. [2023-09-01 11:53:45,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 258 transitions, 3628 flow [2023-09-01 11:53:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 11:53:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 11:53:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3448 transitions. [2023-09-01 11:53:45,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820449897750511 [2023-09-01 11:53:45,688 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3448 transitions. [2023-09-01 11:53:45,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3448 transitions. [2023-09-01 11:53:45,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:45,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3448 transitions. [2023-09-01 11:53:45,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 137.92) internal successors, (3448), 25 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:45,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:45,702 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 489.0) internal successors, (12714), 26 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:45,702 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 2406 flow. Second operand 25 states and 3448 transitions. [2023-09-01 11:53:45,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 258 transitions, 3628 flow [2023-09-01 11:53:45,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3520 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-09-01 11:53:45,747 INFO L231 Difference]: Finished difference. Result has 190 places, 194 transitions, 2849 flow [2023-09-01 11:53:45,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2849, PETRI_PLACES=190, PETRI_TRANSITIONS=194} [2023-09-01 11:53:45,747 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2023-09-01 11:53:45,747 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 194 transitions, 2849 flow [2023-09-01 11:53:45,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 135.6) internal successors, (5424), 40 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:45,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:45,749 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:45,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:45,954 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:45,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2033547511, now seen corresponding path program 12 times [2023-09-01 11:53:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770085817] [2023-09-01 11:53:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770085817] [2023-09-01 11:53:46,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770085817] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155139886] [2023-09-01 11:53:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:53:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:46,637 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:46,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 11:53:46,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:53:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:46,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:46,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:46,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:47,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:47,412 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-09-01 11:53:47,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 103 [2023-09-01 11:53:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155139886] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:47,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:47,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-09-01 11:53:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151869050] [2023-09-01 11:53:47,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:47,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 11:53:47,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 11:53:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-09-01 11:53:48,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:53:48,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 194 transitions, 2849 flow. Second operand has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:48,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:48,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:53:48,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:49,333 INFO L130 PetriNetUnfolder]: 1051/1915 cut-off events. [2023-09-01 11:53:49,333 INFO L131 PetriNetUnfolder]: For 25632/25632 co-relation queries the response was YES. [2023-09-01 11:53:49,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 1915 events. 1051/1915 cut-off events. For 25632/25632 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11235 event pairs, 352 based on Foata normal form. 6/1921 useless extension candidates. Maximal degree in co-relation 12818. Up to 1562 conditions per place. [2023-09-01 11:53:49,349 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 174 selfloop transitions, 53 changer transitions 11/238 dead transitions. [2023-09-01 11:53:49,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 3893 flow [2023-09-01 11:53:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:53:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:53:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2545 transitions. [2023-09-01 11:53:49,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37174992696465087 [2023-09-01 11:53:49,353 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2545 transitions. [2023-09-01 11:53:49,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2545 transitions. [2023-09-01 11:53:49,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:49,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2545 transitions. [2023-09-01 11:53:49,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:49,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:49,362 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:49,362 INFO L175 Difference]: Start difference. First operand has 190 places, 194 transitions, 2849 flow. Second operand 14 states and 2545 transitions. [2023-09-01 11:53:49,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 3893 flow [2023-09-01 11:53:49,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 238 transitions, 3693 flow, removed 40 selfloop flow, removed 16 redundant places. [2023-09-01 11:53:49,442 INFO L231 Difference]: Finished difference. Result has 191 places, 207 transitions, 3098 flow [2023-09-01 11:53:49,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3098, PETRI_PLACES=191, PETRI_TRANSITIONS=207} [2023-09-01 11:53:49,443 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2023-09-01 11:53:49,443 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 207 transitions, 3098 flow [2023-09-01 11:53:49,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 179.04166666666666) internal successors, (4297), 24 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:49,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:49,444 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:49,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:49,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:49,651 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:49,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2027142943, now seen corresponding path program 13 times [2023-09-01 11:53:49,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:49,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036275254] [2023-09-01 11:53:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:50,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036275254] [2023-09-01 11:53:50,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036275254] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129657017] [2023-09-01 11:53:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:53:50,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:50,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:50,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 11:53:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 11:53:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:50,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:53:50,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:50,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:50,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:51,433 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (< (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse2) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse6 (select .cse7 ~o_2~0.base))) (let ((.cse4 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse6 c_~o_2~0.offset))) (or (< .cse4 .cse5) (< (select .cse6 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse4 .cse5)))))) (or (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset)))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (= .cse10 .cse9) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3))))))) (forall ((v_ArrVal_1291 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1291))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))))) is different from false [2023-09-01 11:53:51,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:51,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 160 [2023-09-01 11:53:51,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:51,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 84 [2023-09-01 11:53:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:53:51,986 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:51,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-09-01 11:53:51,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:53:51,994 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:51,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-09-01 11:53:51,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:53:52,000 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:53:52,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-09-01 11:53:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129657017] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:52,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:52,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-09-01 11:53:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869132592] [2023-09-01 11:53:52,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:53:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:53:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-09-01 11:53:52,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-09-01 11:53:52,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 207 transitions, 3098 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:52,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:52,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-09-01 11:53:52,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:53,823 INFO L130 PetriNetUnfolder]: 1127/2039 cut-off events. [2023-09-01 11:53:53,823 INFO L131 PetriNetUnfolder]: For 29082/29082 co-relation queries the response was YES. [2023-09-01 11:53:53,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2039 events. 1127/2039 cut-off events. For 29082/29082 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11969 event pairs, 241 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 14410. Up to 1568 conditions per place. [2023-09-01 11:53:53,842 INFO L137 encePairwiseOnDemand]: 475/489 looper letters, 139 selfloop transitions, 121 changer transitions 3/263 dead transitions. [2023-09-01 11:53:53,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 263 transitions, 4420 flow [2023-09-01 11:53:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:53:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:53:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2264 transitions. [2023-09-01 11:53:53,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307040607654105 [2023-09-01 11:53:53,846 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2264 transitions. [2023-09-01 11:53:53,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2264 transitions. [2023-09-01 11:53:53,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:53,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2264 transitions. [2023-09-01 11:53:53,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.71428571428572) internal successors, (2264), 14 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:53,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:53,855 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:53,855 INFO L175 Difference]: Start difference. First operand has 191 places, 207 transitions, 3098 flow. Second operand 14 states and 2264 transitions. [2023-09-01 11:53:53,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 263 transitions, 4420 flow [2023-09-01 11:53:53,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 263 transitions, 4197 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-09-01 11:53:53,955 INFO L231 Difference]: Finished difference. Result has 198 places, 241 transitions, 3899 flow [2023-09-01 11:53:53,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3899, PETRI_PLACES=198, PETRI_TRANSITIONS=241} [2023-09-01 11:53:53,955 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 175 predicate places. [2023-09-01 11:53:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 241 transitions, 3899 flow [2023-09-01 11:53:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:53,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:53,957 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:53,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:54,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:54,163 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:54,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash -797449613, now seen corresponding path program 14 times [2023-09-01 11:53:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:54,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276331219] [2023-09-01 11:53:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:54,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:54,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276331219] [2023-09-01 11:53:54,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276331219] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:54,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422584644] [2023-09-01 11:53:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:53:54,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:54,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:54,758 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:54,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 11:53:54,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:53:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:53:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:55,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:55,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:55,448 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:53:55,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 71 [2023-09-01 11:53:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422584644] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:53:55,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:53:55,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-09-01 11:53:55,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110243628] [2023-09-01 11:53:55,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:53:55,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:53:55,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:53:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:53:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:53:56,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:53:56,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 241 transitions, 3899 flow. Second operand has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:56,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:53:56,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:53:56,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:53:57,657 INFO L130 PetriNetUnfolder]: 1313/2381 cut-off events. [2023-09-01 11:53:57,657 INFO L131 PetriNetUnfolder]: For 34957/34957 co-relation queries the response was YES. [2023-09-01 11:53:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17828 conditions, 2381 events. 1313/2381 cut-off events. For 34957/34957 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 14636 event pairs, 139 based on Foata normal form. 2/2383 useless extension candidates. Maximal degree in co-relation 17692. Up to 866 conditions per place. [2023-09-01 11:53:57,677 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 202 selfloop transitions, 120 changer transitions 10/332 dead transitions. [2023-09-01 11:53:57,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 332 transitions, 5886 flow [2023-09-01 11:53:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:53:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:53:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2750 transitions. [2023-09-01 11:53:57,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37491479209270623 [2023-09-01 11:53:57,685 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2750 transitions. [2023-09-01 11:53:57,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2750 transitions. [2023-09-01 11:53:57,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:53:57,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2750 transitions. [2023-09-01 11:53:57,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.33333333333334) internal successors, (2750), 15 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:57,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:57,700 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:57,700 INFO L175 Difference]: Start difference. First operand has 198 places, 241 transitions, 3899 flow. Second operand 15 states and 2750 transitions. [2023-09-01 11:53:57,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 332 transitions, 5886 flow [2023-09-01 11:53:57,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 332 transitions, 5629 flow, removed 30 selfloop flow, removed 10 redundant places. [2023-09-01 11:53:57,818 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 4664 flow [2023-09-01 11:53:57,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4664, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2023-09-01 11:53:57,819 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 182 predicate places. [2023-09-01 11:53:57,820 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 4664 flow [2023-09-01 11:53:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:53:57,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:53:57,821 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:53:57,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 11:53:58,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:58,027 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:53:58,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:53:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1548093533, now seen corresponding path program 15 times [2023-09-01 11:53:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:53:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869728551] [2023-09-01 11:53:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:53:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:53:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:53:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:58,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:53:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869728551] [2023-09-01 11:53:58,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869728551] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:53:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387053183] [2023-09-01 11:53:58,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:53:58,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:53:58,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:53:58,748 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:53:58,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 11:53:58,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:53:58,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:53:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 11:53:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:53:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:53:59,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:53:59,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:59,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:53:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:53:59,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:53:59,924 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse0 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse1 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (< (select .cse2 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse0 .cse1)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse5 (select .cse6 ~o_2~0.base))) (let ((.cse7 (select .cse5 .cse3))) (or (< (select .cse5 c_~o_2~0.offset) (select (select .cse6 c_~o_0~0.base) c_~o_0~0.offset)) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse7)))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (= (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse11 (select .cse12 ~o_2~0.base))) (let ((.cse10 (select (select .cse12 c_~o_0~0.base) c_~o_0~0.offset)) (.cse9 (select .cse11 c_~o_2~0.offset))) (or (< .cse9 .cse10) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse11 .cse3)) (= .cse10 .cse9)))))) (forall ((v_ArrVal_1432 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1432))) (let ((.cse14 (select .cse13 ~o_2~0.base))) (let ((.cse15 (select .cse14 .cse3))) (or (< (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset) (select .cse14 c_~o_2~0.offset)) (< .cse15 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse15)))))))) is different from false [2023-09-01 11:53:59,947 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:53:59,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2023-09-01 11:53:59,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:53:59,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-09-01 11:54:00,029 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-09-01 11:54:00,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 173 [2023-09-01 11:54:00,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:00,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 118 [2023-09-01 11:54:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:54:00,655 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:54:00,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-09-01 11:54:00,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:54:00,661 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:54:00,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-09-01 11:54:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 11:54:00,667 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:54:00,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-09-01 11:54:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387053183] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:00,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-09-01 11:54:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739183136] [2023-09-01 11:54:00,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:54:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:54:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=816, Unknown=1, NotChecked=58, Total=992 [2023-09-01 11:54:00,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 489 [2023-09-01 11:54:00,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 4664 flow. Second operand has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:00,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:00,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 489 [2023-09-01 11:54:00,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:04,117 INFO L130 PetriNetUnfolder]: 1313/2379 cut-off events. [2023-09-01 11:54:04,117 INFO L131 PetriNetUnfolder]: For 36515/36515 co-relation queries the response was YES. [2023-09-01 11:54:04,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18690 conditions, 2379 events. 1313/2379 cut-off events. For 36515/36515 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14441 event pairs, 291 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 18554. Up to 1762 conditions per place. [2023-09-01 11:54:04,138 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 167 selfloop transitions, 129 changer transitions 5/301 dead transitions. [2023-09-01 11:54:04,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 301 transitions, 5521 flow [2023-09-01 11:54:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:54:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:54:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2265 transitions. [2023-09-01 11:54:04,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3308501314636284 [2023-09-01 11:54:04,142 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2265 transitions. [2023-09-01 11:54:04,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2265 transitions. [2023-09-01 11:54:04,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:04,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2265 transitions. [2023-09-01 11:54:04,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.78571428571428) internal successors, (2265), 14 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:04,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:04,150 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:04,150 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 4664 flow. Second operand 14 states and 2265 transitions. [2023-09-01 11:54:04,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 301 transitions, 5521 flow [2023-09-01 11:54:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 301 transitions, 4984 flow, removed 183 selfloop flow, removed 13 redundant places. [2023-09-01 11:54:04,277 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 4454 flow [2023-09-01 11:54:04,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4454, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2023-09-01 11:54:04,278 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 183 predicate places. [2023-09-01 11:54:04,278 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 4454 flow [2023-09-01 11:54:04,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 158.78125) internal successors, (5081), 32 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:04,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:04,279 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:04,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 11:54:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:04,485 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:04,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash -308879501, now seen corresponding path program 16 times [2023-09-01 11:54:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991743474] [2023-09-01 11:54:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:04,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:05,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991743474] [2023-09-01 11:54:05,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991743474] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:05,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242227201] [2023-09-01 11:54:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:54:05,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:05,085 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:05,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 11:54:05,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:54:05,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:05,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:54:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:05,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:54:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:05,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:05,927 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:54:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:54:05,957 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:54:05,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-09-01 11:54:05,965 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:54:05,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:54:05,971 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:54:05,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:54:05,974 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:54:05,981 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:54:05,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:54:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:06,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242227201] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:06,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:06,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-09-01 11:54:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179200253] [2023-09-01 11:54:06,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:06,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:54:06,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:54:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:54:06,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:54:06,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 4454 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:06,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:06,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:54:06,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:07,771 INFO L130 PetriNetUnfolder]: 1329/2421 cut-off events. [2023-09-01 11:54:07,771 INFO L131 PetriNetUnfolder]: For 32125/32125 co-relation queries the response was YES. [2023-09-01 11:54:07,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2421 events. 1329/2421 cut-off events. For 32125/32125 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14846 event pairs, 437 based on Foata normal form. 2/2423 useless extension candidates. Maximal degree in co-relation 17654. Up to 2078 conditions per place. [2023-09-01 11:54:07,788 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 251 selfloop transitions, 55 changer transitions 2/308 dead transitions. [2023-09-01 11:54:07,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 5480 flow [2023-09-01 11:54:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:54:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:54:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2377 transitions. [2023-09-01 11:54:07,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739185150228095 [2023-09-01 11:54:07,791 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2377 transitions. [2023-09-01 11:54:07,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2377 transitions. [2023-09-01 11:54:07,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:07,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2377 transitions. [2023-09-01 11:54:07,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.84615384615384) internal successors, (2377), 13 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,799 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,800 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 4454 flow. Second operand 13 states and 2377 transitions. [2023-09-01 11:54:07,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 5480 flow [2023-09-01 11:54:07,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 308 transitions, 5184 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-09-01 11:54:07,906 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 4533 flow [2023-09-01 11:54:07,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4533, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2023-09-01 11:54:07,907 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 185 predicate places. [2023-09-01 11:54:07,907 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 4533 flow [2023-09-01 11:54:07,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:07,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:07,908 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:07,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:08,108 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,SelfDestructingSolverStorable24 [2023-09-01 11:54:08,109 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:08,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 702796357, now seen corresponding path program 17 times [2023-09-01 11:54:08,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546640391] [2023-09-01 11:54:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:08,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:08,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546640391] [2023-09-01 11:54:08,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546640391] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:08,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521064035] [2023-09-01 11:54:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:54:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:08,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:08,571 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:08,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 11:54:08,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:54:08,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 11:54:08,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:08,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:08,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-09-01 11:54:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:08,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:09,227 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-09-01 11:54:09,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 99 [2023-09-01 11:54:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:09,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521064035] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:09,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:09,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-09-01 11:54:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722299066] [2023-09-01 11:54:09,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:09,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:54:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:54:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:54:10,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:54:10,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 4533 flow. Second operand has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:10,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:10,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:54:10,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:11,322 INFO L130 PetriNetUnfolder]: 1327/2429 cut-off events. [2023-09-01 11:54:11,322 INFO L131 PetriNetUnfolder]: For 33258/33258 co-relation queries the response was YES. [2023-09-01 11:54:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17867 conditions, 2429 events. 1327/2429 cut-off events. For 33258/33258 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15040 event pairs, 443 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 17734. Up to 2056 conditions per place. [2023-09-01 11:54:11,340 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 238 selfloop transitions, 68 changer transitions 2/308 dead transitions. [2023-09-01 11:54:11,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 5378 flow [2023-09-01 11:54:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:54:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:54:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2374 transitions. [2023-09-01 11:54:11,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37344659430549 [2023-09-01 11:54:11,345 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2374 transitions. [2023-09-01 11:54:11,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2374 transitions. [2023-09-01 11:54:11,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:11,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2374 transitions. [2023-09-01 11:54:11,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.6153846153846) internal successors, (2374), 13 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:11,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:11,352 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:11,352 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 4533 flow. Second operand 13 states and 2374 transitions. [2023-09-01 11:54:11,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 5378 flow [2023-09-01 11:54:11,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 308 transitions, 5203 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-09-01 11:54:11,435 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 4598 flow [2023-09-01 11:54:11,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4598, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-09-01 11:54:11,436 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 192 predicate places. [2023-09-01 11:54:11,437 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 4598 flow [2023-09-01 11:54:11,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 180.0) internal successors, (4500), 25 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:11,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:11,438 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:11,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:11,643 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,SelfDestructingSolverStorable25 [2023-09-01 11:54:11,643 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:11,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash -347288759, now seen corresponding path program 18 times [2023-09-01 11:54:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:11,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364230467] [2023-09-01 11:54:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:11,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364230467] [2023-09-01 11:54:12,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364230467] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799948210] [2023-09-01 11:54:12,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:54:12,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:12,358 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:12,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 11:54:12,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 11:54:12,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 11:54:12,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:12,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:12,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 11:54:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:12,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:13,230 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:54:13,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-09-01 11:54:13,266 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-09-01 11:54:13,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-09-01 11:54:13,274 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:54:13,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:54:13,280 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:54:13,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:54:13,283 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-09-01 11:54:13,291 INFO L321 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-09-01 11:54:13,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-09-01 11:54:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:13,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799948210] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:13,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:13,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-09-01 11:54:13,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447155085] [2023-09-01 11:54:13,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:54:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:54:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:54:14,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 11:54:14,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 4598 flow. Second operand has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:14,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:14,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 11:54:14,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:15,343 INFO L130 PetriNetUnfolder]: 1327/2427 cut-off events. [2023-09-01 11:54:15,344 INFO L131 PetriNetUnfolder]: For 32348/32348 co-relation queries the response was YES. [2023-09-01 11:54:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 2427 events. 1327/2427 cut-off events. For 32348/32348 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15017 event pairs, 435 based on Foata normal form. 2/2429 useless extension candidates. Maximal degree in co-relation 17740. Up to 2054 conditions per place. [2023-09-01 11:54:15,366 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 257 selfloop transitions, 56 changer transitions 3/316 dead transitions. [2023-09-01 11:54:15,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 316 transitions, 5472 flow [2023-09-01 11:54:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:54:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:54:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2199 transitions. [2023-09-01 11:54:15,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37474437627811863 [2023-09-01 11:54:15,369 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2199 transitions. [2023-09-01 11:54:15,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2199 transitions. [2023-09-01 11:54:15,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:15,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2199 transitions. [2023-09-01 11:54:15,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.25) internal successors, (2199), 12 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:15,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:15,376 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:15,376 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 4598 flow. Second operand 12 states and 2199 transitions. [2023-09-01 11:54:15,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 316 transitions, 5472 flow [2023-09-01 11:54:15,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 316 transitions, 5304 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-09-01 11:54:15,491 INFO L231 Difference]: Finished difference. Result has 217 places, 288 transitions, 4611 flow [2023-09-01 11:54:15,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4611, PETRI_PLACES=217, PETRI_TRANSITIONS=288} [2023-09-01 11:54:15,492 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2023-09-01 11:54:15,492 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 288 transitions, 4611 flow [2023-09-01 11:54:15,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 180.08695652173913) internal successors, (4142), 23 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:15,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:15,493 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:15,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:15,694 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,SelfDestructingSolverStorable26 [2023-09-01 11:54:15,694 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:15,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1754254317, now seen corresponding path program 19 times [2023-09-01 11:54:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120751944] [2023-09-01 11:54:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120751944] [2023-09-01 11:54:16,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120751944] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154788066] [2023-09-01 11:54:16,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:54:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:16,389 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:16,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 11:54:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:16,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:16,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:54:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:16,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:17,104 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:17,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:17,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154788066] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:17,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:17,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:54:17,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937358909] [2023-09-01 11:54:17,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:54:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:54:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:54:17,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:17,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 288 transitions, 4611 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:17,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:17,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:18,942 INFO L130 PetriNetUnfolder]: 1389/2543 cut-off events. [2023-09-01 11:54:18,942 INFO L131 PetriNetUnfolder]: For 35040/35040 co-relation queries the response was YES. [2023-09-01 11:54:18,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18640 conditions, 2543 events. 1389/2543 cut-off events. For 35040/35040 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 15996 event pairs, 249 based on Foata normal form. 8/2551 useless extension candidates. Maximal degree in co-relation 18504. Up to 781 conditions per place. [2023-09-01 11:54:18,962 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 252 selfloop transitions, 145 changer transitions 3/400 dead transitions. [2023-09-01 11:54:18,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 400 transitions, 6788 flow [2023-09-01 11:54:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:54:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:54:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2798 transitions. [2023-09-01 11:54:18,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814587593728698 [2023-09-01 11:54:18,965 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2798 transitions. [2023-09-01 11:54:18,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2798 transitions. [2023-09-01 11:54:18,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:18,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2798 transitions. [2023-09-01 11:54:18,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 186.53333333333333) internal successors, (2798), 15 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,974 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:18,974 INFO L175 Difference]: Start difference. First operand has 217 places, 288 transitions, 4611 flow. Second operand 15 states and 2798 transitions. [2023-09-01 11:54:18,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 400 transitions, 6788 flow [2023-09-01 11:54:19,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 400 transitions, 6623 flow, removed 14 selfloop flow, removed 10 redundant places. [2023-09-01 11:54:19,090 INFO L231 Difference]: Finished difference. Result has 224 places, 301 transitions, 4950 flow [2023-09-01 11:54:19,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4950, PETRI_PLACES=224, PETRI_TRANSITIONS=301} [2023-09-01 11:54:19,090 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 201 predicate places. [2023-09-01 11:54:19,090 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 301 transitions, 4950 flow [2023-09-01 11:54:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:19,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:19,091 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:19,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:19,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:19,296 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:19,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1070556359, now seen corresponding path program 20 times [2023-09-01 11:54:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:19,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991878498] [2023-09-01 11:54:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:20,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:20,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991878498] [2023-09-01 11:54:20,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991878498] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972038727] [2023-09-01 11:54:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:54:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:20,045 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) [2023-09-01 11:54:20,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 11:54:20,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:54:20,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:54:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:20,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:20,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-09-01 11:54:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:20,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:20,619 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:20,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972038727] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:20,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:20,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-09-01 11:54:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129654737] [2023-09-01 11:54:20,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:20,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 11:54:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 11:54:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:54:21,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:21,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 301 transitions, 4950 flow. Second operand has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:21,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:21,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:21,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:23,346 INFO L130 PetriNetUnfolder]: 1481/2691 cut-off events. [2023-09-01 11:54:23,346 INFO L131 PetriNetUnfolder]: For 38043/38043 co-relation queries the response was YES. [2023-09-01 11:54:23,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20348 conditions, 2691 events. 1481/2691 cut-off events. For 38043/38043 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17016 event pairs, 255 based on Foata normal form. 8/2699 useless extension candidates. Maximal degree in co-relation 20210. Up to 931 conditions per place. [2023-09-01 11:54:23,370 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 231 selfloop transitions, 184 changer transitions 8/423 dead transitions. [2023-09-01 11:54:23,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 423 transitions, 7380 flow [2023-09-01 11:54:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:54:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:54:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4072 transitions. [2023-09-01 11:54:23,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37850901654582636 [2023-09-01 11:54:23,374 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4072 transitions. [2023-09-01 11:54:23,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4072 transitions. [2023-09-01 11:54:23,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:23,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4072 transitions. [2023-09-01 11:54:23,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 185.0909090909091) internal successors, (4072), 22 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:23,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:23,383 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:23,383 INFO L175 Difference]: Start difference. First operand has 224 places, 301 transitions, 4950 flow. Second operand 22 states and 4072 transitions. [2023-09-01 11:54:23,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 423 transitions, 7380 flow [2023-09-01 11:54:23,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 423 transitions, 7157 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-09-01 11:54:23,504 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 5752 flow [2023-09-01 11:54:23,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5752, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2023-09-01 11:54:23,505 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 221 predicate places. [2023-09-01 11:54:23,505 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 5752 flow [2023-09-01 11:54:23,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:23,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:23,506 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:23,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:23,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 11:54:23,707 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:23,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash -685105157, now seen corresponding path program 21 times [2023-09-01 11:54:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267327859] [2023-09-01 11:54:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:24,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:24,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267327859] [2023-09-01 11:54:24,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267327859] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:24,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701094560] [2023-09-01 11:54:24,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:54:24,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:24,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:24,297 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) [2023-09-01 11:54:24,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 11:54:24,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:54:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:24,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:24,818 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:54:24,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:54:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701094560] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:24,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:24,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-09-01 11:54:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319328116] [2023-09-01 11:54:24,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:54:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:54:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:54:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:54:25,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 5752 flow. Second operand has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:25,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:25,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:54:25,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:26,173 INFO L130 PetriNetUnfolder]: 1505/2721 cut-off events. [2023-09-01 11:54:26,173 INFO L131 PetriNetUnfolder]: For 41487/41487 co-relation queries the response was YES. [2023-09-01 11:54:26,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21284 conditions, 2721 events. 1505/2721 cut-off events. For 41487/41487 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17211 event pairs, 361 based on Foata normal form. 8/2729 useless extension candidates. Maximal degree in co-relation 21142. Up to 1659 conditions per place. [2023-09-01 11:54:26,198 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 239 selfloop transitions, 175 changer transitions 2/416 dead transitions. [2023-09-01 11:54:26,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 416 transitions, 7590 flow [2023-09-01 11:54:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:54:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:54:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2606 transitions. [2023-09-01 11:54:26,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806602395559451 [2023-09-01 11:54:26,201 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2606 transitions. [2023-09-01 11:54:26,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2606 transitions. [2023-09-01 11:54:26,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:26,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2606 transitions. [2023-09-01 11:54:26,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.14285714285714) internal successors, (2606), 14 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:26,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:26,208 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:26,208 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 5752 flow. Second operand 14 states and 2606 transitions. [2023-09-01 11:54:26,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 416 transitions, 7590 flow [2023-09-01 11:54:26,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 416 transitions, 7399 flow, removed 55 selfloop flow, removed 6 redundant places. [2023-09-01 11:54:26,346 INFO L231 Difference]: Finished difference. Result has 251 places, 344 transitions, 6180 flow [2023-09-01 11:54:26,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6180, PETRI_PLACES=251, PETRI_TRANSITIONS=344} [2023-09-01 11:54:26,346 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 228 predicate places. [2023-09-01 11:54:26,346 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 344 transitions, 6180 flow [2023-09-01 11:54:26,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:26,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:26,347 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:26,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:26,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:26,553 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:26,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1140820281, now seen corresponding path program 22 times [2023-09-01 11:54:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:26,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669596031] [2023-09-01 11:54:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:27,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:27,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669596031] [2023-09-01 11:54:27,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669596031] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:27,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348104569] [2023-09-01 11:54:27,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:54:27,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:27,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:27,064 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) [2023-09-01 11:54:27,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 11:54:27,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:54:27,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:27,342 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:27,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:54:27,350 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:54:27,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:54:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:27,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:27,629 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:27,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348104569] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:27,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:54:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756505875] [2023-09-01 11:54:27,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:27,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:54:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:54:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:54:28,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:28,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 344 transitions, 6180 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:28,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:28,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:28,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:29,853 INFO L130 PetriNetUnfolder]: 1585/2873 cut-off events. [2023-09-01 11:54:29,853 INFO L131 PetriNetUnfolder]: For 49696/49696 co-relation queries the response was YES. [2023-09-01 11:54:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23581 conditions, 2873 events. 1585/2873 cut-off events. For 49696/49696 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18379 event pairs, 378 based on Foata normal form. 8/2881 useless extension candidates. Maximal degree in co-relation 23438. Up to 1637 conditions per place. [2023-09-01 11:54:29,879 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 255 selfloop transitions, 185 changer transitions 4/444 dead transitions. [2023-09-01 11:54:29,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 444 transitions, 8415 flow [2023-09-01 11:54:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:54:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:54:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3157 transitions. [2023-09-01 11:54:29,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797666305786118 [2023-09-01 11:54:29,881 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3157 transitions. [2023-09-01 11:54:29,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3157 transitions. [2023-09-01 11:54:29,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:29,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3157 transitions. [2023-09-01 11:54:29,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:29,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:29,888 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:29,888 INFO L175 Difference]: Start difference. First operand has 251 places, 344 transitions, 6180 flow. Second operand 17 states and 3157 transitions. [2023-09-01 11:54:29,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 444 transitions, 8415 flow [2023-09-01 11:54:30,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 444 transitions, 8048 flow, removed 15 selfloop flow, removed 11 redundant places. [2023-09-01 11:54:30,047 INFO L231 Difference]: Finished difference. Result has 259 places, 357 transitions, 6512 flow [2023-09-01 11:54:30,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=5817, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6512, PETRI_PLACES=259, PETRI_TRANSITIONS=357} [2023-09-01 11:54:30,048 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 236 predicate places. [2023-09-01 11:54:30,048 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 357 transitions, 6512 flow [2023-09-01 11:54:30,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:30,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:30,049 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:30,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:30,253 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,SelfDestructingSolverStorable30 [2023-09-01 11:54:30,253 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:30,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1405470709, now seen corresponding path program 23 times [2023-09-01 11:54:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443942184] [2023-09-01 11:54:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:30,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:30,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443942184] [2023-09-01 11:54:30,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443942184] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:30,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403127632] [2023-09-01 11:54:30,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:54:30,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:30,832 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) [2023-09-01 11:54:30,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 11:54:31,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:54:31,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:54:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:31,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:31,363 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:31,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403127632] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:31,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:31,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:54:31,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890676096] [2023-09-01 11:54:31,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:54:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:54:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:54:32,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 11:54:32,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 357 transitions, 6512 flow. Second operand has 20 states, 20 states have (on average 181.2) internal successors, (3624), 20 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:32,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:32,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 11:54:32,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:33,094 INFO L130 PetriNetUnfolder]: 1733/3129 cut-off events. [2023-09-01 11:54:33,094 INFO L131 PetriNetUnfolder]: For 59994/59994 co-relation queries the response was YES. [2023-09-01 11:54:33,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26999 conditions, 3129 events. 1733/3129 cut-off events. For 59994/59994 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 20336 event pairs, 459 based on Foata normal form. 8/3137 useless extension candidates. Maximal degree in co-relation 26856. Up to 2275 conditions per place. [2023-09-01 11:54:33,125 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 210 selfloop transitions, 216 changer transitions 12/438 dead transitions. [2023-09-01 11:54:33,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 438 transitions, 8614 flow [2023-09-01 11:54:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:54:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:54:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2034 transitions. [2023-09-01 11:54:33,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781372002230898 [2023-09-01 11:54:33,127 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2034 transitions. [2023-09-01 11:54:33,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2034 transitions. [2023-09-01 11:54:33,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:33,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2034 transitions. [2023-09-01 11:54:33,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.9090909090909) internal successors, (2034), 11 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:33,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:33,132 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:33,132 INFO L175 Difference]: Start difference. First operand has 259 places, 357 transitions, 6512 flow. Second operand 11 states and 2034 transitions. [2023-09-01 11:54:33,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 438 transitions, 8614 flow [2023-09-01 11:54:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 438 transitions, 8243 flow, removed 69 selfloop flow, removed 7 redundant places. [2023-09-01 11:54:33,319 INFO L231 Difference]: Finished difference. Result has 266 places, 408 transitions, 7804 flow [2023-09-01 11:54:33,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7804, PETRI_PLACES=266, PETRI_TRANSITIONS=408} [2023-09-01 11:54:33,320 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 243 predicate places. [2023-09-01 11:54:33,320 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 408 transitions, 7804 flow [2023-09-01 11:54:33,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.2) internal successors, (3624), 20 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:33,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:33,321 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:33,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:33,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:33,521 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:33,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1007976255, now seen corresponding path program 24 times [2023-09-01 11:54:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038544076] [2023-09-01 11:54:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:34,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038544076] [2023-09-01 11:54:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038544076] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91617424] [2023-09-01 11:54:34,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:54:34,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:34,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:34,098 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:34,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 11:54:34,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 11:54:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 11:54:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:34,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:34,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:54:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:34,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:34,724 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:34,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:34,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91617424] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:34,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-09-01 11:54:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53268205] [2023-09-01 11:54:34,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:34,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 11:54:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 11:54:34,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:54:35,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:35,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 408 transitions, 7804 flow. Second operand has 21 states, 21 states have (on average 182.04761904761904) internal successors, (3823), 21 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:35,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:35,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:35,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:37,415 INFO L130 PetriNetUnfolder]: 1833/3323 cut-off events. [2023-09-01 11:54:37,415 INFO L131 PetriNetUnfolder]: For 70466/70466 co-relation queries the response was YES. [2023-09-01 11:54:37,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30426 conditions, 3323 events. 1833/3323 cut-off events. For 70466/70466 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 21814 event pairs, 397 based on Foata normal form. 40/3363 useless extension candidates. Maximal degree in co-relation 30278. Up to 1831 conditions per place. [2023-09-01 11:54:37,445 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 276 selfloop transitions, 213 changer transitions 4/493 dead transitions. [2023-09-01 11:54:37,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 493 transitions, 10182 flow [2023-09-01 11:54:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:54:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:54:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2980 transitions. [2023-09-01 11:54:37,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38087934560327197 [2023-09-01 11:54:37,450 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2980 transitions. [2023-09-01 11:54:37,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2980 transitions. [2023-09-01 11:54:37,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:37,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2980 transitions. [2023-09-01 11:54:37,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 186.25) internal successors, (2980), 16 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:37,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:37,458 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:37,459 INFO L175 Difference]: Start difference. First operand has 266 places, 408 transitions, 7804 flow. Second operand 16 states and 2980 transitions. [2023-09-01 11:54:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 493 transitions, 10182 flow [2023-09-01 11:54:37,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 493 transitions, 10002 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-09-01 11:54:37,681 INFO L231 Difference]: Finished difference. Result has 280 places, 425 transitions, 8825 flow [2023-09-01 11:54:37,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8825, PETRI_PLACES=280, PETRI_TRANSITIONS=425} [2023-09-01 11:54:37,681 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 257 predicate places. [2023-09-01 11:54:37,681 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 425 transitions, 8825 flow [2023-09-01 11:54:37,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.04761904761904) internal successors, (3823), 21 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:37,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:37,682 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:37,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:37,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:37,883 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:37,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2084366075, now seen corresponding path program 25 times [2023-09-01 11:54:37,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:37,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363531072] [2023-09-01 11:54:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:38,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:38,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363531072] [2023-09-01 11:54:38,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363531072] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:38,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430738814] [2023-09-01 11:54:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:54:38,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:38,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:38,295 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:38,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 11:54:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:38,586 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:38,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:54:38,593 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:54:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:54:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:38,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:38,867 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:38,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:38,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430738814] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:38,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:54:38,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809521836] [2023-09-01 11:54:38,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:54:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:54:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:54:39,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:39,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 425 transitions, 8825 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:39,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:39,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:39,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:40,666 INFO L130 PetriNetUnfolder]: 1841/3335 cut-off events. [2023-09-01 11:54:40,666 INFO L131 PetriNetUnfolder]: For 79761/79761 co-relation queries the response was YES. [2023-09-01 11:54:40,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32404 conditions, 3335 events. 1841/3335 cut-off events. For 79761/79761 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 21931 event pairs, 431 based on Foata normal form. 16/3351 useless extension candidates. Maximal degree in co-relation 32250. Up to 2087 conditions per place. [2023-09-01 11:54:40,709 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 275 selfloop transitions, 196 changer transitions 9/480 dead transitions. [2023-09-01 11:54:40,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 480 transitions, 10614 flow [2023-09-01 11:54:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:54:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:54:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2783 transitions. [2023-09-01 11:54:40,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794137695978187 [2023-09-01 11:54:40,712 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2783 transitions. [2023-09-01 11:54:40,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2783 transitions. [2023-09-01 11:54:40,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:40,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2783 transitions. [2023-09-01 11:54:40,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 185.53333333333333) internal successors, (2783), 15 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:40,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:40,720 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:40,720 INFO L175 Difference]: Start difference. First operand has 280 places, 425 transitions, 8825 flow. Second operand 15 states and 2783 transitions. [2023-09-01 11:54:40,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 480 transitions, 10614 flow [2023-09-01 11:54:41,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 480 transitions, 10286 flow, removed 88 selfloop flow, removed 7 redundant places. [2023-09-01 11:54:41,007 INFO L231 Difference]: Finished difference. Result has 287 places, 422 transitions, 8958 flow [2023-09-01 11:54:41,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8958, PETRI_PLACES=287, PETRI_TRANSITIONS=422} [2023-09-01 11:54:41,008 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 264 predicate places. [2023-09-01 11:54:41,008 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 422 transitions, 8958 flow [2023-09-01 11:54:41,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:41,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:41,009 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:41,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:41,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:41,209 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:41,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash 840106411, now seen corresponding path program 26 times [2023-09-01 11:54:41,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:41,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879582070] [2023-09-01 11:54:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:41,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:41,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879582070] [2023-09-01 11:54:41,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879582070] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:41,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151978616] [2023-09-01 11:54:41,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:54:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:41,726 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:41,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 11:54:41,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:54:41,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:42,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:42,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:54:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:42,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:42,302 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:42,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:42,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151978616] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:42,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:42,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:54:42,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478571889] [2023-09-01 11:54:42,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:42,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:54:42,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:54:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:54:43,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:43,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 422 transitions, 8958 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:43,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:43,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:43,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:44,560 INFO L130 PetriNetUnfolder]: 1797/3233 cut-off events. [2023-09-01 11:54:44,560 INFO L131 PetriNetUnfolder]: For 79108/79108 co-relation queries the response was YES. [2023-09-01 11:54:44,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 3233 events. 1797/3233 cut-off events. For 79108/79108 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 20995 event pairs, 407 based on Foata normal form. 8/3241 useless extension candidates. Maximal degree in co-relation 32142. Up to 2027 conditions per place. [2023-09-01 11:54:44,596 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 260 selfloop transitions, 201 changer transitions 8/469 dead transitions. [2023-09-01 11:54:44,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 469 transitions, 10534 flow [2023-09-01 11:54:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:54:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:54:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2959 transitions. [2023-09-01 11:54:44,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37819529652351735 [2023-09-01 11:54:44,600 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2959 transitions. [2023-09-01 11:54:44,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2959 transitions. [2023-09-01 11:54:44,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:44,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2959 transitions. [2023-09-01 11:54:44,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.9375) internal successors, (2959), 16 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:44,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:44,608 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:44,608 INFO L175 Difference]: Start difference. First operand has 287 places, 422 transitions, 8958 flow. Second operand 16 states and 2959 transitions. [2023-09-01 11:54:44,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 469 transitions, 10534 flow [2023-09-01 11:54:44,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 469 transitions, 10099 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-09-01 11:54:44,876 INFO L231 Difference]: Finished difference. Result has 287 places, 419 transitions, 8868 flow [2023-09-01 11:54:44,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8485, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8868, PETRI_PLACES=287, PETRI_TRANSITIONS=419} [2023-09-01 11:54:44,877 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 264 predicate places. [2023-09-01 11:54:44,877 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 419 transitions, 8868 flow [2023-09-01 11:54:44,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:44,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:44,877 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:44,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-09-01 11:54:45,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-09-01 11:54:45,081 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:45,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1157324161, now seen corresponding path program 27 times [2023-09-01 11:54:45,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:45,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330961294] [2023-09-01 11:54:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:45,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:45,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330961294] [2023-09-01 11:54:45,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330961294] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:45,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221550444] [2023-09-01 11:54:45,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:54:45,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:45,481 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:45,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 11:54:45,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:54:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 11:54:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:45,941 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:54:45,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:54:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:46,389 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:54:46,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:54:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221550444] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:46,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:46,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2023-09-01 11:54:46,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752456081] [2023-09-01 11:54:46,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:46,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:54:46,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:54:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:54:47,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:54:47,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 419 transitions, 8868 flow. Second operand has 23 states, 23 states have (on average 179.08695652173913) internal successors, (4119), 23 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:47,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:47,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:54:47,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:48,701 INFO L130 PetriNetUnfolder]: 1857/3327 cut-off events. [2023-09-01 11:54:48,701 INFO L131 PetriNetUnfolder]: For 78321/78321 co-relation queries the response was YES. [2023-09-01 11:54:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33676 conditions, 3327 events. 1857/3327 cut-off events. For 78321/78321 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 21599 event pairs, 205 based on Foata normal form. 20/3347 useless extension candidates. Maximal degree in co-relation 33520. Up to 2280 conditions per place. [2023-09-01 11:54:48,735 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 228 selfloop transitions, 250 changer transitions 2/480 dead transitions. [2023-09-01 11:54:48,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 480 transitions, 10716 flow [2023-09-01 11:54:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:54:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:54:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3102 transitions. [2023-09-01 11:54:48,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37315048718874055 [2023-09-01 11:54:48,738 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3102 transitions. [2023-09-01 11:54:48,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3102 transitions. [2023-09-01 11:54:48,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:48,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3102 transitions. [2023-09-01 11:54:48,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 182.47058823529412) internal successors, (3102), 17 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:48,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:48,744 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:48,744 INFO L175 Difference]: Start difference. First operand has 287 places, 419 transitions, 8868 flow. Second operand 17 states and 3102 transitions. [2023-09-01 11:54:48,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 480 transitions, 10716 flow [2023-09-01 11:54:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 480 transitions, 10319 flow, removed 16 selfloop flow, removed 16 redundant places. [2023-09-01 11:54:48,992 INFO L231 Difference]: Finished difference. Result has 288 places, 437 transitions, 9768 flow [2023-09-01 11:54:48,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=8474, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9768, PETRI_PLACES=288, PETRI_TRANSITIONS=437} [2023-09-01 11:54:48,992 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 265 predicate places. [2023-09-01 11:54:48,992 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 437 transitions, 9768 flow [2023-09-01 11:54:48,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 179.08695652173913) internal successors, (4119), 23 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:48,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:48,993 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:49,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:49,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 11:54:49,196 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:49,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2046803309, now seen corresponding path program 28 times [2023-09-01 11:54:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:49,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813383604] [2023-09-01 11:54:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:49,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:49,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813383604] [2023-09-01 11:54:49,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813383604] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964423165] [2023-09-01 11:54:49,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:54:49,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:49,647 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:49,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 11:54:49,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:54:49,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:49,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:49,984 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:49,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:54:49,995 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:54:49,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:54:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:50,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:50,234 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:54:50,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:54:50,252 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:54:50,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:54:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:50,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964423165] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:50,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:50,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:54:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472442686] [2023-09-01 11:54:50,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:50,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:54:50,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:54:50,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:54:51,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:51,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 437 transitions, 9768 flow. Second operand has 19 states, 19 states have (on average 182.10526315789474) internal successors, (3460), 19 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:51,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:51,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:52,719 INFO L130 PetriNetUnfolder]: 1961/3519 cut-off events. [2023-09-01 11:54:52,719 INFO L131 PetriNetUnfolder]: For 94948/94948 co-relation queries the response was YES. [2023-09-01 11:54:52,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37145 conditions, 3519 events. 1961/3519 cut-off events. For 94948/94948 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 23223 event pairs, 369 based on Foata normal form. 8/3527 useless extension candidates. Maximal degree in co-relation 36986. Up to 1883 conditions per place. [2023-09-01 11:54:52,758 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 286 selfloop transitions, 235 changer transitions 4/525 dead transitions. [2023-09-01 11:54:52,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 525 transitions, 12358 flow [2023-09-01 11:54:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:54:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:54:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3521 transitions. [2023-09-01 11:54:52,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3789688946292111 [2023-09-01 11:54:52,762 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3521 transitions. [2023-09-01 11:54:52,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3521 transitions. [2023-09-01 11:54:52,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:52,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3521 transitions. [2023-09-01 11:54:52,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.31578947368422) internal successors, (3521), 19 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:52,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:52,772 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:52,772 INFO L175 Difference]: Start difference. First operand has 288 places, 437 transitions, 9768 flow. Second operand 19 states and 3521 transitions. [2023-09-01 11:54:52,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 525 transitions, 12358 flow [2023-09-01 11:54:53,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 525 transitions, 11910 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-09-01 11:54:53,126 INFO L231 Difference]: Finished difference. Result has 300 places, 452 transitions, 10370 flow [2023-09-01 11:54:53,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10370, PETRI_PLACES=300, PETRI_TRANSITIONS=452} [2023-09-01 11:54:53,127 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 277 predicate places. [2023-09-01 11:54:53,128 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 452 transitions, 10370 flow [2023-09-01 11:54:53,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.10526315789474) internal successors, (3460), 19 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:53,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:53,129 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:53,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-09-01 11:54:53,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:53,335 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:53,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1064638639, now seen corresponding path program 29 times [2023-09-01 11:54:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599955232] [2023-09-01 11:54:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:53,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:53,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599955232] [2023-09-01 11:54:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599955232] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411444205] [2023-09-01 11:54:53,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:54:53,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:53,820 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:53,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 11:54:54,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:54:54,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:54,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:54,181 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:54:54,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-09-01 11:54:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:54,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:54,345 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:54:54,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:54:54,363 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:54:54,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:54:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:54,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411444205] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:54,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:54,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:54:54,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344069564] [2023-09-01 11:54:54,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:54,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:54:54,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:54,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:54:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:54:55,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:55,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 452 transitions, 10370 flow. Second operand has 19 states, 19 states have (on average 182.31578947368422) internal successors, (3464), 19 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) [2023-09-01 11:54:55,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:55,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:55,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:54:56,306 INFO L130 PetriNetUnfolder]: 1953/3511 cut-off events. [2023-09-01 11:54:56,306 INFO L131 PetriNetUnfolder]: For 103005/103005 co-relation queries the response was YES. [2023-09-01 11:54:56,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38155 conditions, 3511 events. 1953/3511 cut-off events. For 103005/103005 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 23238 event pairs, 507 based on Foata normal form. 8/3519 useless extension candidates. Maximal degree in co-relation 37994. Up to 2517 conditions per place. [2023-09-01 11:54:56,345 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 218 selfloop transitions, 251 changer transitions 11/480 dead transitions. [2023-09-01 11:54:56,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 480 transitions, 11608 flow [2023-09-01 11:54:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:54:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:54:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2044 transitions. [2023-09-01 11:54:56,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37999628183677264 [2023-09-01 11:54:56,347 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2044 transitions. [2023-09-01 11:54:56,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2044 transitions. [2023-09-01 11:54:56,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:54:56,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2044 transitions. [2023-09-01 11:54:56,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.8181818181818) internal successors, (2044), 11 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:56,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:56,351 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:56,351 INFO L175 Difference]: Start difference. First operand has 300 places, 452 transitions, 10370 flow. Second operand 11 states and 2044 transitions. [2023-09-01 11:54:56,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 480 transitions, 11608 flow [2023-09-01 11:54:56,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 480 transitions, 11361 flow, removed 85 selfloop flow, removed 8 redundant places. [2023-09-01 11:54:56,719 INFO L231 Difference]: Finished difference. Result has 305 places, 453 transitions, 10870 flow [2023-09-01 11:54:56,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10123, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10870, PETRI_PLACES=305, PETRI_TRANSITIONS=453} [2023-09-01 11:54:56,721 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 282 predicate places. [2023-09-01 11:54:56,721 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 453 transitions, 10870 flow [2023-09-01 11:54:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.31578947368422) internal successors, (3464), 19 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) [2023-09-01 11:54:56,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:54:56,722 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:54:56,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 11:54:56,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 11:54:56,928 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:54:56,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:54:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1348808325, now seen corresponding path program 30 times [2023-09-01 11:54:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:54:56,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622922760] [2023-09-01 11:54:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:54:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:54:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:54:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:54:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622922760] [2023-09-01 11:54:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622922760] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:54:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286465478] [2023-09-01 11:54:57,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:54:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:54:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:54:57,537 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:54:57,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 11:54:57,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 11:54:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:54:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:54:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:54:57,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:54:57,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:54:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:57,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:54:58,102 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:54:58,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:54:58,117 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:54:58,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:54:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:54:58,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286465478] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:54:58,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:54:58,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:54:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262931625] [2023-09-01 11:54:58,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:54:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:54:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:54:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:54:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:54:58,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:54:58,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 453 transitions, 10870 flow. Second operand has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:54:58,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:54:58,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:54:58,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:00,105 INFO L130 PetriNetUnfolder]: 1987/3563 cut-off events. [2023-09-01 11:55:00,105 INFO L131 PetriNetUnfolder]: For 111326/111326 co-relation queries the response was YES. [2023-09-01 11:55:00,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39977 conditions, 3563 events. 1987/3563 cut-off events. For 111326/111326 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 23549 event pairs, 391 based on Foata normal form. 8/3571 useless extension candidates. Maximal degree in co-relation 39812. Up to 1971 conditions per place. [2023-09-01 11:55:00,146 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 271 selfloop transitions, 235 changer transitions 2/508 dead transitions. [2023-09-01 11:55:00,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 508 transitions, 12800 flow [2023-09-01 11:55:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:55:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:55:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2596 transitions. [2023-09-01 11:55:00,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791995325737657 [2023-09-01 11:55:00,149 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2596 transitions. [2023-09-01 11:55:00,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2596 transitions. [2023-09-01 11:55:00,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:00,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2596 transitions. [2023-09-01 11:55:00,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.42857142857142) internal successors, (2596), 14 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:00,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:00,157 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:00,157 INFO L175 Difference]: Start difference. First operand has 305 places, 453 transitions, 10870 flow. Second operand 14 states and 2596 transitions. [2023-09-01 11:55:00,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 508 transitions, 12800 flow [2023-09-01 11:55:00,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 508 transitions, 12588 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-09-01 11:55:00,511 INFO L231 Difference]: Finished difference. Result has 310 places, 459 transitions, 11338 flow [2023-09-01 11:55:00,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10664, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11338, PETRI_PLACES=310, PETRI_TRANSITIONS=459} [2023-09-01 11:55:00,512 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 287 predicate places. [2023-09-01 11:55:00,512 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 459 transitions, 11338 flow [2023-09-01 11:55:00,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.1578947368421) internal successors, (3461), 19 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:00,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:00,513 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:00,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 11:55:00,714 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:00,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash -691507321, now seen corresponding path program 31 times [2023-09-01 11:55:00,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:00,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871853949] [2023-09-01 11:55:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:01,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:01,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871853949] [2023-09-01 11:55:01,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871853949] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:01,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494114607] [2023-09-01 11:55:01,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:55:01,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:01,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:01,188 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:01,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 11:55:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:55:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:01,528 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:55:01,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:55:01,535 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:55:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:55:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:01,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:01,819 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:55:01,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:55:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:01,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494114607] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:01,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:01,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:55:01,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138135766] [2023-09-01 11:55:01,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:01,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:55:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:55:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:55:02,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:55:02,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 459 transitions, 11338 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:02,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:02,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:55:02,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:04,509 INFO L130 PetriNetUnfolder]: 2103/3775 cut-off events. [2023-09-01 11:55:04,509 INFO L131 PetriNetUnfolder]: For 128633/128633 co-relation queries the response was YES. [2023-09-01 11:55:04,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44016 conditions, 3775 events. 2103/3775 cut-off events. For 128633/128633 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 25252 event pairs, 396 based on Foata normal form. 8/3783 useless extension candidates. Maximal degree in co-relation 43850. Up to 2007 conditions per place. [2023-09-01 11:55:04,556 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 300 selfloop transitions, 248 changer transitions 7/555 dead transitions. [2023-09-01 11:55:04,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 555 transitions, 14179 flow [2023-09-01 11:55:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 11:55:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 11:55:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 4072 transitions. [2023-09-01 11:55:04,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37850901654582636 [2023-09-01 11:55:04,559 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 4072 transitions. [2023-09-01 11:55:04,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 4072 transitions. [2023-09-01 11:55:04,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:04,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 4072 transitions. [2023-09-01 11:55:04,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 185.0909090909091) internal successors, (4072), 22 states have internal predecessors, (4072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:04,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:04,566 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 489.0) internal successors, (11247), 23 states have internal predecessors, (11247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:04,566 INFO L175 Difference]: Start difference. First operand has 310 places, 459 transitions, 11338 flow. Second operand 22 states and 4072 transitions. [2023-09-01 11:55:04,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 555 transitions, 14179 flow [2023-09-01 11:55:05,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 555 transitions, 13655 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-09-01 11:55:05,009 INFO L231 Difference]: Finished difference. Result has 327 places, 474 transitions, 11984 flow [2023-09-01 11:55:05,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11984, PETRI_PLACES=327, PETRI_TRANSITIONS=474} [2023-09-01 11:55:05,010 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 304 predicate places. [2023-09-01 11:55:05,010 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 474 transitions, 11984 flow [2023-09-01 11:55:05,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:05,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:05,011 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:05,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:05,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 11:55:05,211 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:05,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1869769151, now seen corresponding path program 32 times [2023-09-01 11:55:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:05,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616766092] [2023-09-01 11:55:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:05,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:05,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616766092] [2023-09-01 11:55:05,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616766092] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:05,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932568325] [2023-09-01 11:55:05,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:55:05,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:05,719 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:05,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 11:55:05,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:55:05,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:55:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:06,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:06,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-09-01 11:55:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:06,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:06,367 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:55:06,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:55:06,383 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:55:06,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:55:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:06,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932568325] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:06,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:06,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:55:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781648810] [2023-09-01 11:55:06,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:55:06,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:55:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:55:07,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:55:07,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 474 transitions, 11984 flow. Second operand has 20 states, 20 states have (on average 183.3) internal successors, (3666), 20 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:07,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:07,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:55:07,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:08,495 INFO L130 PetriNetUnfolder]: 2073/3715 cut-off events. [2023-09-01 11:55:08,495 INFO L131 PetriNetUnfolder]: For 133981/133981 co-relation queries the response was YES. [2023-09-01 11:55:08,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44383 conditions, 3715 events. 2073/3715 cut-off events. For 133981/133981 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24738 event pairs, 447 based on Foata normal form. 16/3731 useless extension candidates. Maximal degree in co-relation 44212. Up to 2225 conditions per place. [2023-09-01 11:55:08,538 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 288 selfloop transitions, 228 changer transitions 8/524 dead transitions. [2023-09-01 11:55:08,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 524 transitions, 13762 flow [2023-09-01 11:55:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:55:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:55:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2616 transitions. [2023-09-01 11:55:08,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38212094653812445 [2023-09-01 11:55:08,540 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2616 transitions. [2023-09-01 11:55:08,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2616 transitions. [2023-09-01 11:55:08,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:08,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2616 transitions. [2023-09-01 11:55:08,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.85714285714286) internal successors, (2616), 14 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:08,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:08,545 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:08,545 INFO L175 Difference]: Start difference. First operand has 327 places, 474 transitions, 11984 flow. Second operand 14 states and 2616 transitions. [2023-09-01 11:55:08,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 524 transitions, 13762 flow [2023-09-01 11:55:09,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 524 transitions, 13413 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-09-01 11:55:09,091 INFO L231 Difference]: Finished difference. Result has 329 places, 469 transitions, 12001 flow [2023-09-01 11:55:09,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11563, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12001, PETRI_PLACES=329, PETRI_TRANSITIONS=469} [2023-09-01 11:55:09,092 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 306 predicate places. [2023-09-01 11:55:09,092 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 469 transitions, 12001 flow [2023-09-01 11:55:09,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 183.3) internal successors, (3666), 20 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:09,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:09,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:09,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:09,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:09,299 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:09,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:09,299 INFO L85 PathProgramCache]: Analyzing trace with hash 499274341, now seen corresponding path program 33 times [2023-09-01 11:55:09,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:09,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680716387] [2023-09-01 11:55:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:09,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680716387] [2023-09-01 11:55:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680716387] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974206508] [2023-09-01 11:55:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:55:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:09,934 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:09,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 11:55:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:55:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:55:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:10,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:10,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:55:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:10,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:10,553 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:55:10,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:55:10,568 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:55:10,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:55:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:10,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974206508] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:10,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:10,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:55:10,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418963035] [2023-09-01 11:55:10,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:10,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:55:10,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:55:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:55:11,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:55:11,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 469 transitions, 12001 flow. Second operand has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:11,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:11,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:55:11,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:12,887 INFO L130 PetriNetUnfolder]: 2041/3645 cut-off events. [2023-09-01 11:55:12,887 INFO L131 PetriNetUnfolder]: For 133115/133115 co-relation queries the response was YES. [2023-09-01 11:55:12,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 3645 events. 2041/3645 cut-off events. For 133115/133115 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 24080 event pairs, 447 based on Foata normal form. 8/3653 useless extension candidates. Maximal degree in co-relation 44018. Up to 2223 conditions per place. [2023-09-01 11:55:12,935 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 269 selfloop transitions, 236 changer transitions 6/511 dead transitions. [2023-09-01 11:55:12,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 511 transitions, 13682 flow [2023-09-01 11:55:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:55:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:55:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2957 transitions. [2023-09-01 11:55:12,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377939672801636 [2023-09-01 11:55:12,937 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2957 transitions. [2023-09-01 11:55:12,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2957 transitions. [2023-09-01 11:55:12,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:12,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2957 transitions. [2023-09-01 11:55:12,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 184.8125) internal successors, (2957), 16 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:13,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:13,022 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:13,022 INFO L175 Difference]: Start difference. First operand has 329 places, 469 transitions, 12001 flow. Second operand 16 states and 2957 transitions. [2023-09-01 11:55:13,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 511 transitions, 13682 flow [2023-09-01 11:55:13,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 511 transitions, 13408 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-09-01 11:55:13,540 INFO L231 Difference]: Finished difference. Result has 332 places, 466 transitions, 12166 flow [2023-09-01 11:55:13,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11706, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12166, PETRI_PLACES=332, PETRI_TRANSITIONS=466} [2023-09-01 11:55:13,541 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2023-09-01 11:55:13,541 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 466 transitions, 12166 flow [2023-09-01 11:55:13,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.3) internal successors, (3646), 20 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:13,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:13,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:13,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:13,748 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:13,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash 816492091, now seen corresponding path program 34 times [2023-09-01 11:55:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:13,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128543010] [2023-09-01 11:55:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128543010] [2023-09-01 11:55:14,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128543010] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232563505] [2023-09-01 11:55:14,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:55:14,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:14,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:14,177 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:14,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 11:55:14,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:55:14,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:14,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:55:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:14,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:14,703 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:55:14,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:55:14,717 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:55:14,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:55:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:14,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232563505] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:14,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:14,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-09-01 11:55:14,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858661326] [2023-09-01 11:55:14,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:14,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:55:14,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:55:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:55:15,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:55:15,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 466 transitions, 12166 flow. Second operand has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:15,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:15,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:55:15,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:16,555 INFO L130 PetriNetUnfolder]: 2063/3663 cut-off events. [2023-09-01 11:55:16,555 INFO L131 PetriNetUnfolder]: For 135397/135397 co-relation queries the response was YES. [2023-09-01 11:55:16,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45031 conditions, 3663 events. 2063/3663 cut-off events. For 135397/135397 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 24015 event pairs, 398 based on Foata normal form. 8/3671 useless extension candidates. Maximal degree in co-relation 44860. Up to 2021 conditions per place. [2023-09-01 11:55:16,602 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 274 selfloop transitions, 236 changer transitions 2/512 dead transitions. [2023-09-01 11:55:16,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 512 transitions, 14014 flow [2023-09-01 11:55:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:55:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:55:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2235 transitions. [2023-09-01 11:55:16,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38087934560327197 [2023-09-01 11:55:16,604 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2235 transitions. [2023-09-01 11:55:16,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2235 transitions. [2023-09-01 11:55:16,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:16,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2235 transitions. [2023-09-01 11:55:16,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.25) internal successors, (2235), 12 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:16,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:16,610 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:16,610 INFO L175 Difference]: Start difference. First operand has 332 places, 466 transitions, 12166 flow. Second operand 12 states and 2235 transitions. [2023-09-01 11:55:16,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 512 transitions, 14014 flow [2023-09-01 11:55:17,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 512 transitions, 13525 flow, removed 44 selfloop flow, removed 15 redundant places. [2023-09-01 11:55:17,134 INFO L231 Difference]: Finished difference. Result has 326 places, 468 transitions, 12477 flow [2023-09-01 11:55:17,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=11684, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12477, PETRI_PLACES=326, PETRI_TRANSITIONS=468} [2023-09-01 11:55:17,134 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 303 predicate places. [2023-09-01 11:55:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 468 transitions, 12477 flow [2023-09-01 11:55:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:17,136 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:17,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:17,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 11:55:17,341 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:17,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash -675003441, now seen corresponding path program 35 times [2023-09-01 11:55:17,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:17,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044964590] [2023-09-01 11:55:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:17,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:17,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044964590] [2023-09-01 11:55:17,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044964590] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:17,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533489740] [2023-09-01 11:55:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:55:17,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:17,749 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:17,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 11:55:17,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:55:17,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:55:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:18,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:18,365 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:55:18,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:55:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533489740] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:18,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:18,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:55:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746900183] [2023-09-01 11:55:18,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:18,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:55:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:55:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:55:19,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:55:19,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 468 transitions, 12477 flow. Second operand has 19 states, 19 states have (on average 183.1578947368421) internal successors, (3480), 19 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:19,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:19,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:55:19,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:20,666 INFO L130 PetriNetUnfolder]: 2127/3751 cut-off events. [2023-09-01 11:55:20,667 INFO L131 PetriNetUnfolder]: For 148081/148081 co-relation queries the response was YES. [2023-09-01 11:55:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47242 conditions, 3751 events. 2127/3751 cut-off events. For 148081/148081 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 24557 event pairs, 361 based on Foata normal form. 8/3759 useless extension candidates. Maximal degree in co-relation 47072. Up to 1993 conditions per place. [2023-09-01 11:55:20,712 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 283 selfloop transitions, 250 changer transitions 2/535 dead transitions. [2023-09-01 11:55:20,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 535 transitions, 14784 flow [2023-09-01 11:55:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:55:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:55:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2976 transitions. [2023-09-01 11:55:20,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803680981595092 [2023-09-01 11:55:20,714 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2976 transitions. [2023-09-01 11:55:20,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2976 transitions. [2023-09-01 11:55:20,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:20,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2976 transitions. [2023-09-01 11:55:20,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 186.0) internal successors, (2976), 16 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:20,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:20,719 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:20,720 INFO L175 Difference]: Start difference. First operand has 326 places, 468 transitions, 12477 flow. Second operand 16 states and 2976 transitions. [2023-09-01 11:55:20,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 535 transitions, 14784 flow [2023-09-01 11:55:21,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 535 transitions, 14613 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-09-01 11:55:21,182 INFO L231 Difference]: Finished difference. Result has 332 places, 475 transitions, 13364 flow [2023-09-01 11:55:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=12248, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13364, PETRI_PLACES=332, PETRI_TRANSITIONS=475} [2023-09-01 11:55:21,184 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2023-09-01 11:55:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 475 transitions, 13364 flow [2023-09-01 11:55:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 183.1578947368421) internal successors, (3480), 19 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:21,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:21,185 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:21,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:21,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-09-01 11:55:21,390 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:21,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash 269100067, now seen corresponding path program 36 times [2023-09-01 11:55:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709139361] [2023-09-01 11:55:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:21,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:21,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709139361] [2023-09-01 11:55:21,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709139361] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:21,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049312512] [2023-09-01 11:55:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:55:21,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:21,801 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:21,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 11:55:22,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 11:55:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:55:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:22,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-09-01 11:55:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:22,305 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:55:22,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:55:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049312512] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:22,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:22,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:55:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703474397] [2023-09-01 11:55:22,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:22,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:55:22,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:55:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:55:22,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 11:55:22,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 475 transitions, 13364 flow. Second operand has 19 states, 19 states have (on average 181.1578947368421) internal successors, (3442), 19 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:22,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:22,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 11:55:22,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:24,303 INFO L130 PetriNetUnfolder]: 2217/3903 cut-off events. [2023-09-01 11:55:24,303 INFO L131 PetriNetUnfolder]: For 173183/173183 co-relation queries the response was YES. [2023-09-01 11:55:24,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50988 conditions, 3903 events. 2217/3903 cut-off events. For 173183/173183 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 25767 event pairs, 378 based on Foata normal form. 8/3911 useless extension candidates. Maximal degree in co-relation 50816. Up to 2009 conditions per place. [2023-09-01 11:55:24,356 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 254 selfloop transitions, 294 changer transitions 2/550 dead transitions. [2023-09-01 11:55:24,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 550 transitions, 16009 flow [2023-09-01 11:55:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:55:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:55:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2574 transitions. [2023-09-01 11:55:24,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37598597721297106 [2023-09-01 11:55:24,358 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2574 transitions. [2023-09-01 11:55:24,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2574 transitions. [2023-09-01 11:55:24,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:24,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2574 transitions. [2023-09-01 11:55:24,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 183.85714285714286) internal successors, (2574), 14 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:24,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:24,363 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:24,363 INFO L175 Difference]: Start difference. First operand has 332 places, 475 transitions, 13364 flow. Second operand 14 states and 2574 transitions. [2023-09-01 11:55:24,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 550 transitions, 16009 flow [2023-09-01 11:55:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 550 transitions, 15822 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-09-01 11:55:24,962 INFO L231 Difference]: Finished difference. Result has 335 places, 493 transitions, 14514 flow [2023-09-01 11:55:24,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=13189, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14514, PETRI_PLACES=335, PETRI_TRANSITIONS=493} [2023-09-01 11:55:24,963 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 312 predicate places. [2023-09-01 11:55:24,963 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 493 transitions, 14514 flow [2023-09-01 11:55:24,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.1578947368421) internal successors, (3442), 19 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:24,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:24,964 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:24,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:25,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 11:55:25,171 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:25,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2064674063, now seen corresponding path program 37 times [2023-09-01 11:55:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:25,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842661322] [2023-09-01 11:55:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:25,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:25,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:25,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842661322] [2023-09-01 11:55:25,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842661322] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752406498] [2023-09-01 11:55:25,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:55:25,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:25,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:25,604 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:25,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 11:55:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:55:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:26,076 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:55:26,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-09-01 11:55:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752406498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:26,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:26,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-09-01 11:55:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130712132] [2023-09-01 11:55:26,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:55:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:55:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:55:26,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:55:26,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 493 transitions, 14514 flow. Second operand has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:26,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:26,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:55:26,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:28,107 INFO L130 PetriNetUnfolder]: 2295/4035 cut-off events. [2023-09-01 11:55:28,107 INFO L131 PetriNetUnfolder]: For 187867/187867 co-relation queries the response was YES. [2023-09-01 11:55:28,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54498 conditions, 4035 events. 2295/4035 cut-off events. For 187867/187867 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 26761 event pairs, 72 based on Foata normal form. 8/4043 useless extension candidates. Maximal degree in co-relation 54324. Up to 1396 conditions per place. [2023-09-01 11:55:28,168 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 164 selfloop transitions, 414 changer transitions 4/582 dead transitions. [2023-09-01 11:55:28,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 582 transitions, 17611 flow [2023-09-01 11:55:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:55:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:55:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2426 transitions. [2023-09-01 11:55:28,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3816265534056945 [2023-09-01 11:55:28,170 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2426 transitions. [2023-09-01 11:55:28,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2426 transitions. [2023-09-01 11:55:28,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:28,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2426 transitions. [2023-09-01 11:55:28,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 186.6153846153846) internal successors, (2426), 13 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:28,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:28,177 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:28,177 INFO L175 Difference]: Start difference. First operand has 335 places, 493 transitions, 14514 flow. Second operand 13 states and 2426 transitions. [2023-09-01 11:55:28,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 582 transitions, 17611 flow [2023-09-01 11:55:29,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 582 transitions, 17519 flow, removed 23 selfloop flow, removed 7 redundant places. [2023-09-01 11:55:29,012 INFO L231 Difference]: Finished difference. Result has 341 places, 524 transitions, 16398 flow [2023-09-01 11:55:29,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=14422, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16398, PETRI_PLACES=341, PETRI_TRANSITIONS=524} [2023-09-01 11:55:29,013 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 318 predicate places. [2023-09-01 11:55:29,013 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 524 transitions, 16398 flow [2023-09-01 11:55:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:29,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:29,014 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:29,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:29,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-09-01 11:55:29,214 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:29,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash -608499983, now seen corresponding path program 38 times [2023-09-01 11:55:29,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:29,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587991091] [2023-09-01 11:55:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:29,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:29,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:29,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587991091] [2023-09-01 11:55:29,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587991091] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:29,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492725469] [2023-09-01 11:55:29,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:55:29,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:29,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:29,646 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:29,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 11:55:29,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:55:29,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 11:55:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:30,093 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:55:30,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:55:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:30,464 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:55:30,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-09-01 11:55:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492725469] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:30,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:30,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2023-09-01 11:55:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431334770] [2023-09-01 11:55:30,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:30,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:55:30,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:55:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:55:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:55:31,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 524 transitions, 16398 flow. Second operand has 25 states, 25 states have (on average 178.96) internal successors, (4474), 25 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:31,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:31,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:55:31,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:33,865 INFO L130 PetriNetUnfolder]: 2523/4495 cut-off events. [2023-09-01 11:55:33,865 INFO L131 PetriNetUnfolder]: For 230343/230343 co-relation queries the response was YES. [2023-09-01 11:55:33,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63364 conditions, 4495 events. 2523/4495 cut-off events. For 230343/230343 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 31015 event pairs, 31 based on Foata normal form. 20/4515 useless extension candidates. Maximal degree in co-relation 63190. Up to 1704 conditions per place. [2023-09-01 11:55:33,923 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 220 selfloop transitions, 454 changer transitions 8/682 dead transitions. [2023-09-01 11:55:33,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 682 transitions, 21595 flow [2023-09-01 11:55:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 11:55:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 11:55:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5096 transitions. [2023-09-01 11:55:33,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721881390593047 [2023-09-01 11:55:33,926 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5096 transitions. [2023-09-01 11:55:33,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5096 transitions. [2023-09-01 11:55:33,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:33,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5096 transitions. [2023-09-01 11:55:33,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 182.0) internal successors, (5096), 28 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:33,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:33,935 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:33,935 INFO L175 Difference]: Start difference. First operand has 341 places, 524 transitions, 16398 flow. Second operand 28 states and 5096 transitions. [2023-09-01 11:55:33,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 682 transitions, 21595 flow [2023-09-01 11:55:34,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 682 transitions, 21157 flow, removed 120 selfloop flow, removed 6 redundant places. [2023-09-01 11:55:34,698 INFO L231 Difference]: Finished difference. Result has 369 places, 598 transitions, 20076 flow [2023-09-01 11:55:34,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=16040, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=20076, PETRI_PLACES=369, PETRI_TRANSITIONS=598} [2023-09-01 11:55:34,699 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 346 predicate places. [2023-09-01 11:55:34,699 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 598 transitions, 20076 flow [2023-09-01 11:55:34,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 178.96) internal successors, (4474), 25 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:34,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:34,700 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:34,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:34,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:34,900 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:34,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:34,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1641094237, now seen corresponding path program 39 times [2023-09-01 11:55:34,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:34,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868742123] [2023-09-01 11:55:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868742123] [2023-09-01 11:55:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868742123] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430754972] [2023-09-01 11:55:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:55:35,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:35,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:35,342 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:35,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 11:55:35,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 11:55:35,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 11:55:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:35,807 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:55:35,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:55:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:35,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:36,195 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:55:36,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-09-01 11:55:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:36,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430754972] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:36,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:36,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2023-09-01 11:55:36,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147713695] [2023-09-01 11:55:36,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:36,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:55:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:55:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:55:37,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:55:37,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 598 transitions, 20076 flow. Second operand has 25 states, 25 states have (on average 178.96) internal successors, (4474), 25 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:37,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:37,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:55:37,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:40,075 INFO L130 PetriNetUnfolder]: 2701/4813 cut-off events. [2023-09-01 11:55:40,076 INFO L131 PetriNetUnfolder]: For 261193/261193 co-relation queries the response was YES. [2023-09-01 11:55:40,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71114 conditions, 4813 events. 2701/4813 cut-off events. For 261193/261193 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33617 event pairs, 25 based on Foata normal form. 20/4833 useless extension candidates. Maximal degree in co-relation 70934. Up to 1892 conditions per place. [2023-09-01 11:55:40,141 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 222 selfloop transitions, 472 changer transitions 7/701 dead transitions. [2023-09-01 11:55:40,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 701 transitions, 23648 flow [2023-09-01 11:55:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 11:55:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 11:55:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4730 transitions. [2023-09-01 11:55:40,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37203083215353155 [2023-09-01 11:55:40,144 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4730 transitions. [2023-09-01 11:55:40,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4730 transitions. [2023-09-01 11:55:40,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:40,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4730 transitions. [2023-09-01 11:55:40,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 181.92307692307693) internal successors, (4730), 26 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:40,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:40,153 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 489.0) internal successors, (13203), 27 states have internal predecessors, (13203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:40,153 INFO L175 Difference]: Start difference. First operand has 369 places, 598 transitions, 20076 flow. Second operand 26 states and 4730 transitions. [2023-09-01 11:55:40,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 701 transitions, 23648 flow [2023-09-01 11:55:41,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 701 transitions, 23144 flow, removed 133 selfloop flow, removed 11 redundant places. [2023-09-01 11:55:41,070 INFO L231 Difference]: Finished difference. Result has 389 places, 626 transitions, 22159 flow [2023-09-01 11:55:41,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=19616, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=22159, PETRI_PLACES=389, PETRI_TRANSITIONS=626} [2023-09-01 11:55:41,071 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 366 predicate places. [2023-09-01 11:55:41,071 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 626 transitions, 22159 flow [2023-09-01 11:55:41,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 178.96) internal successors, (4474), 25 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:41,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:41,072 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:41,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 11:55:41,277 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:41,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 185359705, now seen corresponding path program 40 times [2023-09-01 11:55:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707194958] [2023-09-01 11:55:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:41,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707194958] [2023-09-01 11:55:41,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707194958] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:41,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939221226] [2023-09-01 11:55:41,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:55:41,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:41,977 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:41,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 11:55:42,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:55:42,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 11:55:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:42,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:42,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:55:42,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:42,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:55:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:42,729 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3183 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3183))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3183 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3183))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-09-01 11:55:42,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:42,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:55:42,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:42,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:55:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:43,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939221226] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:43,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:43,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-09-01 11:55:43,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733194957] [2023-09-01 11:55:43,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:43,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 11:55:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 11:55:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2023-09-01 11:55:43,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-09-01 11:55:43,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 626 transitions, 22159 flow. Second operand has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:43,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:43,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-09-01 11:55:43,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:45,566 INFO L130 PetriNetUnfolder]: 2905/5185 cut-off events. [2023-09-01 11:55:45,566 INFO L131 PetriNetUnfolder]: For 299731/299731 co-relation queries the response was YES. [2023-09-01 11:55:45,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78952 conditions, 5185 events. 2905/5185 cut-off events. For 299731/299731 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 36573 event pairs, 260 based on Foata normal form. 8/5193 useless extension candidates. Maximal degree in co-relation 78770. Up to 1840 conditions per place. [2023-09-01 11:55:45,638 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 330 selfloop transitions, 394 changer transitions 2/726 dead transitions. [2023-09-01 11:55:45,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 726 transitions, 26107 flow [2023-09-01 11:55:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:55:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:55:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2477 transitions. [2023-09-01 11:55:45,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3376959781867757 [2023-09-01 11:55:45,640 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2477 transitions. [2023-09-01 11:55:45,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2477 transitions. [2023-09-01 11:55:45,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:45,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2477 transitions. [2023-09-01 11:55:45,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.13333333333333) internal successors, (2477), 15 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:45,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:45,645 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:45,645 INFO L175 Difference]: Start difference. First operand has 389 places, 626 transitions, 22159 flow. Second operand 15 states and 2477 transitions. [2023-09-01 11:55:45,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 726 transitions, 26107 flow [2023-09-01 11:55:46,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 726 transitions, 25220 flow, removed 89 selfloop flow, removed 13 redundant places. [2023-09-01 11:55:46,840 INFO L231 Difference]: Finished difference. Result has 396 places, 664 transitions, 23965 flow [2023-09-01 11:55:46,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=21363, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23965, PETRI_PLACES=396, PETRI_TRANSITIONS=664} [2023-09-01 11:55:46,841 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2023-09-01 11:55:46,841 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 664 transitions, 23965 flow [2023-09-01 11:55:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:46,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:46,842 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:46,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:47,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 11:55:47,048 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:47,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:47,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1816861323, now seen corresponding path program 41 times [2023-09-01 11:55:47,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:47,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148595091] [2023-09-01 11:55:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:47,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148595091] [2023-09-01 11:55:47,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148595091] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:47,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960058332] [2023-09-01 11:55:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:55:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:47,792 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 11:55:48,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:55:48,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjunts are in the unsatisfiable core [2023-09-01 11:55:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:48,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:48,293 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:55:48,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-09-01 11:55:48,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:48,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-09-01 11:55:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:48,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:48,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:48,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2023-09-01 11:55:48,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:48,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:55:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:48,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960058332] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:48,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:48,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 11:55:48,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547708925] [2023-09-01 11:55:48,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:48,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:55:48,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:55:48,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=862, Unknown=3, NotChecked=0, Total=992 [2023-09-01 11:55:50,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 489 [2023-09-01 11:55:50,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 664 transitions, 23965 flow. Second operand has 32 states, 32 states have (on average 156.65625) internal successors, (5013), 32 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:50,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:50,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 489 [2023-09-01 11:55:50,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:55:53,783 INFO L130 PetriNetUnfolder]: 2897/5177 cut-off events. [2023-09-01 11:55:53,783 INFO L131 PetriNetUnfolder]: For 320013/320013 co-relation queries the response was YES. [2023-09-01 11:55:53,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80323 conditions, 5177 events. 2897/5177 cut-off events. For 320013/320013 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 36642 event pairs, 160 based on Foata normal form. 8/5185 useless extension candidates. Maximal degree in co-relation 80134. Up to 1812 conditions per place. [2023-09-01 11:55:53,860 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 317 selfloop transitions, 418 changer transitions 10/745 dead transitions. [2023-09-01 11:55:53,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 745 transitions, 26921 flow [2023-09-01 11:55:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:55:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:55:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2418 transitions. [2023-09-01 11:55:53,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296523517382413 [2023-09-01 11:55:53,862 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2418 transitions. [2023-09-01 11:55:53,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2418 transitions. [2023-09-01 11:55:53,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:55:53,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2418 transitions. [2023-09-01 11:55:53,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.2) internal successors, (2418), 15 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:53,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:53,867 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:53,867 INFO L175 Difference]: Start difference. First operand has 396 places, 664 transitions, 23965 flow. Second operand 15 states and 2418 transitions. [2023-09-01 11:55:53,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 745 transitions, 26921 flow [2023-09-01 11:55:55,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 745 transitions, 26643 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-09-01 11:55:55,477 INFO L231 Difference]: Finished difference. Result has 405 places, 669 transitions, 24943 flow [2023-09-01 11:55:55,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23692, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=24943, PETRI_PLACES=405, PETRI_TRANSITIONS=669} [2023-09-01 11:55:55,478 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 382 predicate places. [2023-09-01 11:55:55,478 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 669 transitions, 24943 flow [2023-09-01 11:55:55,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 156.65625) internal successors, (5013), 32 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:55,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:55:55,479 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:55:55,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-09-01 11:55:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 11:55:55,685 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:55:55,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:55:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash -200288663, now seen corresponding path program 42 times [2023-09-01 11:55:55,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:55:55,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981348466] [2023-09-01 11:55:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:55:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:55:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:55:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:56,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:55:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981348466] [2023-09-01 11:55:56,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981348466] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:55:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445706245] [2023-09-01 11:55:56,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:55:56,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:55:56,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:55:56,395 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:55:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 11:55:56,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:55:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:55:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2023-09-01 11:55:56,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:55:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:55:56,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:55:56,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:56,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:55:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:55:57,263 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3325 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3325))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3325 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3325))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2023-09-01 11:55:57,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:57,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-09-01 11:55:57,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:57,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:55:57,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:57,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:55:57,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:55:57,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:55:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:55:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445706245] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:55:57,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:55:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 11:55:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333815142] [2023-09-01 11:55:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:55:57,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:55:57,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:55:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:55:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=819, Unknown=1, NotChecked=58, Total=992 [2023-09-01 11:55:57,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-09-01 11:55:57,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 669 transitions, 24943 flow. Second operand has 32 states, 32 states have (on average 157.8125) internal successors, (5050), 32 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:55:57,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:55:57,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-09-01 11:55:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:01,391 INFO L130 PetriNetUnfolder]: 2899/5213 cut-off events. [2023-09-01 11:56:01,391 INFO L131 PetriNetUnfolder]: For 342172/342172 co-relation queries the response was YES. [2023-09-01 11:56:01,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82364 conditions, 5213 events. 2899/5213 cut-off events. For 342172/342172 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 37078 event pairs, 206 based on Foata normal form. 34/5247 useless extension candidates. Maximal degree in co-relation 82174. Up to 1804 conditions per place. [2023-09-01 11:56:01,469 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 330 selfloop transitions, 425 changer transitions 12/767 dead transitions. [2023-09-01 11:56:01,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 767 transitions, 27835 flow [2023-09-01 11:56:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 11:56:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 11:56:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5155 transitions. [2023-09-01 11:56:01,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32943507157464214 [2023-09-01 11:56:01,473 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5155 transitions. [2023-09-01 11:56:01,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5155 transitions. [2023-09-01 11:56:01,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:01,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5155 transitions. [2023-09-01 11:56:01,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 161.09375) internal successors, (5155), 32 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:01,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 489.0) internal successors, (16137), 33 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:01,485 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 489.0) internal successors, (16137), 33 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:01,485 INFO L175 Difference]: Start difference. First operand has 405 places, 669 transitions, 24943 flow. Second operand 32 states and 5155 transitions. [2023-09-01 11:56:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 767 transitions, 27835 flow [2023-09-01 11:56:03,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 767 transitions, 27141 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-09-01 11:56:03,291 INFO L231 Difference]: Finished difference. Result has 434 places, 676 transitions, 25411 flow [2023-09-01 11:56:03,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=23900, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25411, PETRI_PLACES=434, PETRI_TRANSITIONS=676} [2023-09-01 11:56:03,291 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 411 predicate places. [2023-09-01 11:56:03,291 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 676 transitions, 25411 flow [2023-09-01 11:56:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.8125) internal successors, (5050), 32 states have internal predecessors, (5050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:03,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:03,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:03,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-09-01 11:56:03,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:03,493 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:03,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1277559199, now seen corresponding path program 43 times [2023-09-01 11:56:03,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752500900] [2023-09-01 11:56:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:03,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:03,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:03,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752500900] [2023-09-01 11:56:03,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752500900] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:03,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499719294] [2023-09-01 11:56:03,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:56:03,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:03,976 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:03,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 11:56:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:56:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:04,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:56:04,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:56:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:04,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:04,534 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:56:04,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:56:04,550 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:56:04,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:56:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:04,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499719294] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:04,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:04,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:56:04,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57322775] [2023-09-01 11:56:04,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:04,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:56:04,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:56:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:56:05,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:56:05,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 676 transitions, 25411 flow. Second operand has 19 states, 19 states have (on average 182.10526315789474) internal successors, (3460), 19 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:05,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:05,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:56:05,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:07,384 INFO L130 PetriNetUnfolder]: 2937/5287 cut-off events. [2023-09-01 11:56:07,384 INFO L131 PetriNetUnfolder]: For 348252/348252 co-relation queries the response was YES. [2023-09-01 11:56:07,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84988 conditions, 5287 events. 2937/5287 cut-off events. For 348252/348252 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 37731 event pairs, 515 based on Foata normal form. 8/5295 useless extension candidates. Maximal degree in co-relation 84790. Up to 2695 conditions per place. [2023-09-01 11:56:07,466 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 293 selfloop transitions, 433 changer transitions 3/729 dead transitions. [2023-09-01 11:56:07,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 729 transitions, 27827 flow [2023-09-01 11:56:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:56:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:56:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2413 transitions. [2023-09-01 11:56:07,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795815636306434 [2023-09-01 11:56:07,468 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2413 transitions. [2023-09-01 11:56:07,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2413 transitions. [2023-09-01 11:56:07,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:07,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2413 transitions. [2023-09-01 11:56:07,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.6153846153846) internal successors, (2413), 13 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:07,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:07,475 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:07,475 INFO L175 Difference]: Start difference. First operand has 434 places, 676 transitions, 25411 flow. Second operand 13 states and 2413 transitions. [2023-09-01 11:56:07,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 729 transitions, 27827 flow [2023-09-01 11:56:09,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 729 transitions, 27161 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-09-01 11:56:09,106 INFO L231 Difference]: Finished difference. Result has 435 places, 681 transitions, 26277 flow [2023-09-01 11:56:09,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=24762, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=26277, PETRI_PLACES=435, PETRI_TRANSITIONS=681} [2023-09-01 11:56:09,107 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 412 predicate places. [2023-09-01 11:56:09,107 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 681 transitions, 26277 flow [2023-09-01 11:56:09,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.10526315789474) internal successors, (3460), 19 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:09,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:09,107 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:09,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:09,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:09,308 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:09,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -6719081, now seen corresponding path program 44 times [2023-09-01 11:56:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:09,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086213795] [2023-09-01 11:56:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:09,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:09,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086213795] [2023-09-01 11:56:09,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086213795] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:09,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800882915] [2023-09-01 11:56:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:56:09,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:09,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:09,818 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:09,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 11:56:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:56:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:56:10,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:10,198 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:56:10,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:56:10,206 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:56:10,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:56:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:10,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:10,413 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:56:10,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:56:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:10,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800882915] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:10,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:10,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:56:10,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386544120] [2023-09-01 11:56:10,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:10,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:56:10,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:56:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:56:11,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:56:11,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 681 transitions, 26277 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:11,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:11,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:56:11,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:13,836 INFO L130 PetriNetUnfolder]: 3041/5479 cut-off events. [2023-09-01 11:56:13,836 INFO L131 PetriNetUnfolder]: For 382797/382797 co-relation queries the response was YES. [2023-09-01 11:56:13,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89687 conditions, 5479 events. 3041/5479 cut-off events. For 382797/382797 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 39380 event pairs, 522 based on Foata normal form. 8/5487 useless extension candidates. Maximal degree in co-relation 89488. Up to 2729 conditions per place. [2023-09-01 11:56:13,923 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 313 selfloop transitions, 447 changer transitions 4/764 dead transitions. [2023-09-01 11:56:13,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 764 transitions, 29460 flow [2023-09-01 11:56:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 11:56:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 11:56:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3885 transitions. [2023-09-01 11:56:13,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-09-01 11:56:13,925 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3885 transitions. [2023-09-01 11:56:13,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3885 transitions. [2023-09-01 11:56:13,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:13,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3885 transitions. [2023-09-01 11:56:13,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 185.0) internal successors, (3885), 21 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:13,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:13,932 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:13,932 INFO L175 Difference]: Start difference. First operand has 435 places, 681 transitions, 26277 flow. Second operand 21 states and 3885 transitions. [2023-09-01 11:56:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 764 transitions, 29460 flow [2023-09-01 11:56:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 764 transitions, 29264 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 11:56:15,570 INFO L231 Difference]: Finished difference. Result has 453 places, 695 transitions, 27776 flow [2023-09-01 11:56:15,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=26081, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=27776, PETRI_PLACES=453, PETRI_TRANSITIONS=695} [2023-09-01 11:56:15,570 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 430 predicate places. [2023-09-01 11:56:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 695 transitions, 27776 flow [2023-09-01 11:56:15,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:15,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:15,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:15,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:15,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:15,772 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:15,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -449093979, now seen corresponding path program 45 times [2023-09-01 11:56:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985065079] [2023-09-01 11:56:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:16,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985065079] [2023-09-01 11:56:16,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985065079] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982308762] [2023-09-01 11:56:16,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:56:16,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:16,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:16,262 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:16,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 11:56:16,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:56:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:16,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:56:16,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:16,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:56:16,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-09-01 11:56:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:16,928 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:56:16,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-09-01 11:56:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982308762] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:16,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:16,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-09-01 11:56:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156042594] [2023-09-01 11:56:16,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:56:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:56:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:56:17,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:56:17,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 695 transitions, 27776 flow. Second operand has 22 states, 22 states have (on average 182.04545454545453) internal successors, (4005), 22 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:17,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:17,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:56:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:20,582 INFO L130 PetriNetUnfolder]: 3081/5563 cut-off events. [2023-09-01 11:56:20,582 INFO L131 PetriNetUnfolder]: For 416128/416128 co-relation queries the response was YES. [2023-09-01 11:56:20,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93899 conditions, 5563 events. 3081/5563 cut-off events. For 416128/416128 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 40197 event pairs, 108 based on Foata normal form. 16/5579 useless extension candidates. Maximal degree in co-relation 93696. Up to 1932 conditions per place. [2023-09-01 11:56:20,672 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 259 selfloop transitions, 505 changer transitions 9/773 dead transitions. [2023-09-01 11:56:20,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 773 transitions, 30866 flow [2023-09-01 11:56:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 11:56:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 11:56:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3344 transitions. [2023-09-01 11:56:20,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799136559872756 [2023-09-01 11:56:20,674 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3344 transitions. [2023-09-01 11:56:20,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3344 transitions. [2023-09-01 11:56:20,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:20,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3344 transitions. [2023-09-01 11:56:20,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 185.77777777777777) internal successors, (3344), 18 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:20,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:20,680 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 489.0) internal successors, (9291), 19 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:20,680 INFO L175 Difference]: Start difference. First operand has 453 places, 695 transitions, 27776 flow. Second operand 18 states and 3344 transitions. [2023-09-01 11:56:20,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 773 transitions, 30866 flow [2023-09-01 11:56:22,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 773 transitions, 30575 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-09-01 11:56:22,650 INFO L231 Difference]: Finished difference. Result has 465 places, 705 transitions, 29471 flow [2023-09-01 11:56:22,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=27485, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=29471, PETRI_PLACES=465, PETRI_TRANSITIONS=705} [2023-09-01 11:56:22,651 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 442 predicate places. [2023-09-01 11:56:22,651 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 705 transitions, 29471 flow [2023-09-01 11:56:22,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 182.04545454545453) internal successors, (4005), 22 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:22,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:22,652 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:22,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-09-01 11:56:22,852 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:22,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash -786034555, now seen corresponding path program 46 times [2023-09-01 11:56:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27581152] [2023-09-01 11:56:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27581152] [2023-09-01 11:56:23,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27581152] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123753504] [2023-09-01 11:56:23,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:56:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:23,327 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:23,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 11:56:23,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:56:23,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:56:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:23,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:23,840 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:56:23,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:56:23,855 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:56:23,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:56:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123753504] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:23,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-09-01 11:56:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321847054] [2023-09-01 11:56:23,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:23,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:56:23,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:56:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:56:24,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:56:24,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 705 transitions, 29471 flow. Second operand has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:24,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:24,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:56:24,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:26,607 INFO L130 PetriNetUnfolder]: 3103/5581 cut-off events. [2023-09-01 11:56:26,607 INFO L131 PetriNetUnfolder]: For 460823/460823 co-relation queries the response was YES. [2023-09-01 11:56:26,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97363 conditions, 5581 events. 3103/5581 cut-off events. For 460823/460823 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 40176 event pairs, 585 based on Foata normal form. 8/5589 useless extension candidates. Maximal degree in co-relation 97152. Up to 2981 conditions per place. [2023-09-01 11:56:26,699 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 301 selfloop transitions, 441 changer transitions 2/744 dead transitions. [2023-09-01 11:56:26,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 744 transitions, 31746 flow [2023-09-01 11:56:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:56:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:56:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2047 transitions. [2023-09-01 11:56:26,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805540063208775 [2023-09-01 11:56:26,701 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2047 transitions. [2023-09-01 11:56:26,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2047 transitions. [2023-09-01 11:56:26,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:26,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2047 transitions. [2023-09-01 11:56:26,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.0909090909091) internal successors, (2047), 11 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:26,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:26,705 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:26,705 INFO L175 Difference]: Start difference. First operand has 465 places, 705 transitions, 29471 flow. Second operand 11 states and 2047 transitions. [2023-09-01 11:56:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 744 transitions, 31746 flow [2023-09-01 11:56:28,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 744 transitions, 31392 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-09-01 11:56:28,862 INFO L231 Difference]: Finished difference. Result has 466 places, 708 transitions, 30577 flow [2023-09-01 11:56:28,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=29121, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=30577, PETRI_PLACES=466, PETRI_TRANSITIONS=708} [2023-09-01 11:56:28,863 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2023-09-01 11:56:28,863 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 708 transitions, 30577 flow [2023-09-01 11:56:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.22222222222223) internal successors, (3298), 18 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:28,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:28,863 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:28,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-09-01 11:56:29,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-09-01 11:56:29,065 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:29,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1418744525, now seen corresponding path program 47 times [2023-09-01 11:56:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724118897] [2023-09-01 11:56:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724118897] [2023-09-01 11:56:29,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724118897] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084795129] [2023-09-01 11:56:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:56:29,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:29,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:29,488 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:29,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 11:56:29,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:56:29,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:56:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:29,867 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:56:29,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:56:29,875 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:56:29,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:56:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:29,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:30,085 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:56:30,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:56:30,101 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:56:30,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:56:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:30,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084795129] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:30,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:30,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:56:30,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079275165] [2023-09-01 11:56:30,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:30,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:56:30,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:56:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:56:30,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:56:30,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 708 transitions, 30577 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:30,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:30,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:56:30,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:33,127 INFO L130 PetriNetUnfolder]: 3111/5605 cut-off events. [2023-09-01 11:56:33,127 INFO L131 PetriNetUnfolder]: For 486868/486868 co-relation queries the response was YES. [2023-09-01 11:56:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100071 conditions, 5605 events. 3111/5605 cut-off events. For 486868/486868 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 40458 event pairs, 598 based on Foata normal form. 16/5621 useless extension candidates. Maximal degree in co-relation 99858. Up to 3141 conditions per place. [2023-09-01 11:56:33,219 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 351 selfloop transitions, 400 changer transitions 8/759 dead transitions. [2023-09-01 11:56:33,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 759 transitions, 33054 flow [2023-09-01 11:56:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:56:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:56:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2597 transitions. [2023-09-01 11:56:33,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37934560327198363 [2023-09-01 11:56:33,221 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2597 transitions. [2023-09-01 11:56:33,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2597 transitions. [2023-09-01 11:56:33,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:33,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2597 transitions. [2023-09-01 11:56:33,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.5) internal successors, (2597), 14 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:33,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:33,226 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:33,226 INFO L175 Difference]: Start difference. First operand has 466 places, 708 transitions, 30577 flow. Second operand 14 states and 2597 transitions. [2023-09-01 11:56:33,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 759 transitions, 33054 flow [2023-09-01 11:56:35,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 759 transitions, 32888 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-09-01 11:56:35,453 INFO L231 Difference]: Finished difference. Result has 473 places, 710 transitions, 31372 flow [2023-09-01 11:56:35,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30419, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=31372, PETRI_PLACES=473, PETRI_TRANSITIONS=710} [2023-09-01 11:56:35,454 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 450 predicate places. [2023-09-01 11:56:35,454 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 710 transitions, 31372 flow [2023-09-01 11:56:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:35,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:35,454 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-09-01 11:56:35,655 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:35,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -908165391, now seen corresponding path program 48 times [2023-09-01 11:56:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684678873] [2023-09-01 11:56:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:36,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:36,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684678873] [2023-09-01 11:56:36,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684678873] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:36,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235423302] [2023-09-01 11:56:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:56:36,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:36,124 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:36,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 11:56:36,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:56:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:36,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:56:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:36,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:36,687 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:56:36,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:56:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:36,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235423302] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:36,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:36,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:56:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154980868] [2023-09-01 11:56:36,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:36,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:56:36,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:36,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:56:36,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:56:37,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:56:37,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 710 transitions, 31372 flow. Second operand has 19 states, 19 states have (on average 183.21052631578948) internal successors, (3481), 19 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:37,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:37,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:56:37,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:40,076 INFO L130 PetriNetUnfolder]: 3157/5647 cut-off events. [2023-09-01 11:56:40,076 INFO L131 PetriNetUnfolder]: For 528343/528343 co-relation queries the response was YES. [2023-09-01 11:56:40,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103907 conditions, 5647 events. 3157/5647 cut-off events. For 528343/528343 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 40522 event pairs, 542 based on Foata normal form. 8/5655 useless extension candidates. Maximal degree in co-relation 103692. Up to 2879 conditions per place. [2023-09-01 11:56:40,174 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 310 selfloop transitions, 452 changer transitions 2/764 dead transitions. [2023-09-01 11:56:40,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 764 transitions, 34082 flow [2023-09-01 11:56:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 11:56:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 11:56:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2971 transitions. [2023-09-01 11:56:40,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37972903885480574 [2023-09-01 11:56:40,176 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2971 transitions. [2023-09-01 11:56:40,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2971 transitions. [2023-09-01 11:56:40,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:40,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2971 transitions. [2023-09-01 11:56:40,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 185.6875) internal successors, (2971), 16 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:40,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:40,182 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:40,182 INFO L175 Difference]: Start difference. First operand has 473 places, 710 transitions, 31372 flow. Second operand 16 states and 2971 transitions. [2023-09-01 11:56:40,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 764 transitions, 34082 flow [2023-09-01 11:56:42,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 764 transitions, 33573 flow, removed 46 selfloop flow, removed 32 redundant places. [2023-09-01 11:56:42,639 INFO L231 Difference]: Finished difference. Result has 455 places, 714 transitions, 32579 flow [2023-09-01 11:56:42,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=30804, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=32579, PETRI_PLACES=455, PETRI_TRANSITIONS=714} [2023-09-01 11:56:42,640 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 432 predicate places. [2023-09-01 11:56:42,640 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 714 transitions, 32579 flow [2023-09-01 11:56:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 183.21052631578948) internal successors, (3481), 19 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:42,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:42,641 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:42,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:42,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-09-01 11:56:42,842 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:42,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash -837593193, now seen corresponding path program 49 times [2023-09-01 11:56:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:42,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70134304] [2023-09-01 11:56:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:42,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:43,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70134304] [2023-09-01 11:56:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70134304] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721343402] [2023-09-01 11:56:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:56:43,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:43,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:43,399 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:43,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 11:56:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:56:43,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:43,815 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:56:43,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:56:43,823 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:56:43,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:56:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:43,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:44,041 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:56:44,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 70 [2023-09-01 11:56:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:44,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721343402] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:44,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:44,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-09-01 11:56:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577518936] [2023-09-01 11:56:44,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 11:56:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 11:56:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:56:44,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:56:44,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 714 transitions, 32579 flow. Second operand has 21 states, 21 states have (on average 182.0952380952381) internal successors, (3824), 21 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:44,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:44,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:56:44,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:47,791 INFO L130 PetriNetUnfolder]: 3313/5895 cut-off events. [2023-09-01 11:56:47,791 INFO L131 PetriNetUnfolder]: For 566738/566738 co-relation queries the response was YES. [2023-09-01 11:56:48,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111441 conditions, 5895 events. 3313/5895 cut-off events. For 566738/566738 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 42355 event pairs, 107 based on Foata normal form. 8/5903 useless extension candidates. Maximal degree in co-relation 111248. Up to 2228 conditions per place. [2023-09-01 11:56:48,104 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 201 selfloop transitions, 595 changer transitions 3/799 dead transitions. [2023-09-01 11:56:48,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 799 transitions, 36387 flow [2023-09-01 11:56:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:56:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:56:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3517 transitions. [2023-09-01 11:56:48,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3785383704660424 [2023-09-01 11:56:48,107 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3517 transitions. [2023-09-01 11:56:48,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3517 transitions. [2023-09-01 11:56:48,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:48,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3517 transitions. [2023-09-01 11:56:48,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.10526315789474) internal successors, (3517), 19 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:48,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:48,114 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:48,114 INFO L175 Difference]: Start difference. First operand has 455 places, 714 transitions, 32579 flow. Second operand 19 states and 3517 transitions. [2023-09-01 11:56:48,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 799 transitions, 36387 flow [2023-09-01 11:56:50,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 799 transitions, 36104 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-09-01 11:56:50,529 INFO L231 Difference]: Finished difference. Result has 458 places, 737 transitions, 35036 flow [2023-09-01 11:56:50,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=32273, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=35036, PETRI_PLACES=458, PETRI_TRANSITIONS=737} [2023-09-01 11:56:50,530 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 435 predicate places. [2023-09-01 11:56:50,530 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 737 transitions, 35036 flow [2023-09-01 11:56:50,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.0952380952381) internal successors, (3824), 21 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:50,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:50,531 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:50,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-09-01 11:56:50,732 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:50,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 167248611, now seen corresponding path program 50 times [2023-09-01 11:56:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57516965] [2023-09-01 11:56:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:51,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57516965] [2023-09-01 11:56:51,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57516965] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:51,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263611569] [2023-09-01 11:56:51,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:56:51,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:51,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:51,198 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:51,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 11:56:51,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:56:51,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:56:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:51,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:56:51,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-09-01 11:56:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:51,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:51,934 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:56:51,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 99 [2023-09-01 11:56:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:52,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263611569] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:52,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:52,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-09-01 11:56:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341158908] [2023-09-01 11:56:52,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 11:56:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 11:56:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-09-01 11:56:52,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:56:52,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 737 transitions, 35036 flow. Second operand has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:52,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:56:52,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:56:52,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:56:55,904 INFO L130 PetriNetUnfolder]: 3293/5855 cut-off events. [2023-09-01 11:56:55,904 INFO L131 PetriNetUnfolder]: For 595131/595131 co-relation queries the response was YES. [2023-09-01 11:56:55,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113568 conditions, 5855 events. 3293/5855 cut-off events. For 595131/595131 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 41914 event pairs, 574 based on Foata normal form. 8/5863 useless extension candidates. Maximal degree in co-relation 113376. Up to 3117 conditions per place. [2023-09-01 11:56:55,995 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 361 selfloop transitions, 418 changer transitions 7/786 dead transitions. [2023-09-01 11:56:55,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 786 transitions, 37245 flow [2023-09-01 11:56:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:56:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:56:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3144 transitions. [2023-09-01 11:56:55,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782028148682786 [2023-09-01 11:56:55,997 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3144 transitions. [2023-09-01 11:56:55,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3144 transitions. [2023-09-01 11:56:55,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:56:55,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3144 transitions. [2023-09-01 11:56:55,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 184.94117647058823) internal successors, (3144), 17 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:56,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:56,003 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:56,003 INFO L175 Difference]: Start difference. First operand has 458 places, 737 transitions, 35036 flow. Second operand 17 states and 3144 transitions. [2023-09-01 11:56:56,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 786 transitions, 37245 flow [2023-09-01 11:56:58,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 786 transitions, 35981 flow, removed 54 selfloop flow, removed 14 redundant places. [2023-09-01 11:56:58,157 INFO L231 Difference]: Finished difference. Result has 459 places, 734 transitions, 34539 flow [2023-09-01 11:56:58,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=33720, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=34539, PETRI_PLACES=459, PETRI_TRANSITIONS=734} [2023-09-01 11:56:58,158 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 436 predicate places. [2023-09-01 11:56:58,158 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 734 transitions, 34539 flow [2023-09-01 11:56:58,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 182.1904761904762) internal successors, (3826), 21 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:56:58,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:56:58,159 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:56:58,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-09-01 11:56:58,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-09-01 11:56:58,360 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:56:58,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:56:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 87706125, now seen corresponding path program 51 times [2023-09-01 11:56:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:56:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042406492] [2023-09-01 11:56:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:56:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:56:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:56:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:56:58,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042406492] [2023-09-01 11:56:58,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042406492] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:56:58,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517304296] [2023-09-01 11:56:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:56:58,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:56:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:56:58,877 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:56:58,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 11:56:59,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:56:59,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:56:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 11:56:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:56:59,259 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:56:59,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:56:59,268 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:56:59,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:56:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:59,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:56:59,673 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:56:59,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:56:59,689 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:56:59,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:56:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:56:59,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517304296] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:56:59,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:56:59,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2023-09-01 11:56:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909547078] [2023-09-01 11:56:59,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:56:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 11:56:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:56:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 11:56:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-09-01 11:57:00,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 489 [2023-09-01 11:57:00,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 734 transitions, 34539 flow. Second operand has 23 states, 23 states have (on average 178.04347826086956) internal successors, (4095), 23 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:00,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:00,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 489 [2023-09-01 11:57:00,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:03,988 INFO L130 PetriNetUnfolder]: 3351/5977 cut-off events. [2023-09-01 11:57:03,988 INFO L131 PetriNetUnfolder]: For 620784/620784 co-relation queries the response was YES. [2023-09-01 11:57:04,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115588 conditions, 5977 events. 3351/5977 cut-off events. For 620784/620784 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43022 event pairs, 400 based on Foata normal form. 22/5999 useless extension candidates. Maximal degree in co-relation 115398. Up to 3140 conditions per place. [2023-09-01 11:57:04,093 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 357 selfloop transitions, 455 changer transitions 5/817 dead transitions. [2023-09-01 11:57:04,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 817 transitions, 38028 flow [2023-09-01 11:57:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 11:57:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 11:57:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3812 transitions. [2023-09-01 11:57:04,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37121433440451845 [2023-09-01 11:57:04,096 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3812 transitions. [2023-09-01 11:57:04,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3812 transitions. [2023-09-01 11:57:04,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:04,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3812 transitions. [2023-09-01 11:57:04,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.52380952380952) internal successors, (3812), 21 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:04,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:04,104 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:04,104 INFO L175 Difference]: Start difference. First operand has 459 places, 734 transitions, 34539 flow. Second operand 21 states and 3812 transitions. [2023-09-01 11:57:04,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 817 transitions, 38028 flow [2023-09-01 11:57:06,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 817 transitions, 37356 flow, removed 83 selfloop flow, removed 15 redundant places. [2023-09-01 11:57:06,370 INFO L231 Difference]: Finished difference. Result has 466 places, 750 transitions, 35860 flow [2023-09-01 11:57:06,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=33892, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=35860, PETRI_PLACES=466, PETRI_TRANSITIONS=750} [2023-09-01 11:57:06,371 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 443 predicate places. [2023-09-01 11:57:06,371 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 750 transitions, 35860 flow [2023-09-01 11:57:06,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.04347826086956) internal successors, (4095), 23 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:06,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:06,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:06,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:06,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:06,572 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:06,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1228252999, now seen corresponding path program 52 times [2023-09-01 11:57:06,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:06,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515374216] [2023-09-01 11:57:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:06,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515374216] [2023-09-01 11:57:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515374216] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704925777] [2023-09-01 11:57:07,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:57:07,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:07,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:07,081 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 11:57:07,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:57:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:57:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:07,481 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:57:07,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 32 [2023-09-01 11:57:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:07,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:07,639 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:57:07,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:57:07,654 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:57:07,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:57:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:07,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704925777] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:07,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:07,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:57:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650441257] [2023-09-01 11:57:07,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:07,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:57:07,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:57:07,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:57:08,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:57:08,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 750 transitions, 35860 flow. Second operand has 19 states, 19 states have (on average 182.26315789473685) internal successors, (3463), 19 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:08,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:08,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:57:08,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:10,834 INFO L130 PetriNetUnfolder]: 3341/5957 cut-off events. [2023-09-01 11:57:10,835 INFO L131 PetriNetUnfolder]: For 637306/637306 co-relation queries the response was YES. [2023-09-01 11:57:10,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116420 conditions, 5957 events. 3341/5957 cut-off events. For 637306/637306 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 42825 event pairs, 820 based on Foata normal form. 8/5965 useless extension candidates. Maximal degree in co-relation 116228. Up to 4289 conditions per place. [2023-09-01 11:57:10,927 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 336 selfloop transitions, 427 changer transitions 10/773 dead transitions. [2023-09-01 11:57:10,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 773 transitions, 37528 flow [2023-09-01 11:57:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 11:57:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 11:57:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2039 transitions. [2023-09-01 11:57:10,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790667410299312 [2023-09-01 11:57:10,929 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2039 transitions. [2023-09-01 11:57:10,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2039 transitions. [2023-09-01 11:57:10,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:10,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2039 transitions. [2023-09-01 11:57:10,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 185.36363636363637) internal successors, (2039), 11 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:10,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:10,933 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 489.0) internal successors, (5868), 12 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:10,933 INFO L175 Difference]: Start difference. First operand has 466 places, 750 transitions, 35860 flow. Second operand 11 states and 2039 transitions. [2023-09-01 11:57:10,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 773 transitions, 37528 flow [2023-09-01 11:57:13,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 773 transitions, 36381 flow, removed 143 selfloop flow, removed 13 redundant places. [2023-09-01 11:57:13,351 INFO L231 Difference]: Finished difference. Result has 463 places, 746 transitions, 35496 flow [2023-09-01 11:57:13,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34673, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=35496, PETRI_PLACES=463, PETRI_TRANSITIONS=746} [2023-09-01 11:57:13,352 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 440 predicate places. [2023-09-01 11:57:13,352 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 746 transitions, 35496 flow [2023-09-01 11:57:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 182.26315789473685) internal successors, (3463), 19 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:13,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:13,353 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:13,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:13,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:13,553 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:13,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:13,554 INFO L85 PathProgramCache]: Analyzing trace with hash -747080383, now seen corresponding path program 53 times [2023-09-01 11:57:13,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:13,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432350876] [2023-09-01 11:57:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:14,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432350876] [2023-09-01 11:57:14,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432350876] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:14,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559136388] [2023-09-01 11:57:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:57:14,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:14,318 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:14,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 11:57:14,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:57:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 71 conjunts are in the unsatisfiable core [2023-09-01 11:57:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:14,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:57:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:57:14,883 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:57:14,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-09-01 11:57:15,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:15,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:57:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:15,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:15,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:15,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2023-09-01 11:57:15,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:15,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:57:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559136388] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:15,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:15,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 33 [2023-09-01 11:57:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695903464] [2023-09-01 11:57:15,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 11:57:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 11:57:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=992, Unknown=2, NotChecked=0, Total=1122 [2023-09-01 11:57:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 489 [2023-09-01 11:57:16,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 746 transitions, 35496 flow. Second operand has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:16,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:16,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 489 [2023-09-01 11:57:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:21,264 INFO L130 PetriNetUnfolder]: 3345/5977 cut-off events. [2023-09-01 11:57:21,264 INFO L131 PetriNetUnfolder]: For 675825/675825 co-relation queries the response was YES. [2023-09-01 11:57:21,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116249 conditions, 5977 events. 3345/5977 cut-off events. For 675825/675825 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 43062 event pairs, 90 based on Foata normal form. 22/5999 useless extension candidates. Maximal degree in co-relation 116060. Up to 2196 conditions per place. [2023-09-01 11:57:21,369 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 320 selfloop transitions, 516 changer transitions 14/850 dead transitions. [2023-09-01 11:57:21,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 850 transitions, 38950 flow [2023-09-01 11:57:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 11:57:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 11:57:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4411 transitions. [2023-09-01 11:57:21,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32215892491966114 [2023-09-01 11:57:21,372 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4411 transitions. [2023-09-01 11:57:21,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4411 transitions. [2023-09-01 11:57:21,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:21,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4411 transitions. [2023-09-01 11:57:21,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 157.53571428571428) internal successors, (4411), 28 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:21,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 489.0) internal successors, (14181), 29 states have internal predecessors, (14181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:21,551 INFO L175 Difference]: Start difference. First operand has 463 places, 746 transitions, 35496 flow. Second operand 28 states and 4411 transitions. [2023-09-01 11:57:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 850 transitions, 38950 flow [2023-09-01 11:57:24,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 850 transitions, 38374 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-09-01 11:57:24,178 INFO L231 Difference]: Finished difference. Result has 481 places, 755 transitions, 36574 flow [2023-09-01 11:57:24,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=34681, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=36574, PETRI_PLACES=481, PETRI_TRANSITIONS=755} [2023-09-01 11:57:24,179 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 458 predicate places. [2023-09-01 11:57:24,179 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 755 transitions, 36574 flow [2023-09-01 11:57:24,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 153.76470588235293) internal successors, (5228), 34 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:24,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:24,180 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:24,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-09-01 11:57:24,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:24,381 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:24,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:24,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1564822417, now seen corresponding path program 54 times [2023-09-01 11:57:24,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:24,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703174629] [2023-09-01 11:57:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:24,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:24,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703174629] [2023-09-01 11:57:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703174629] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52782041] [2023-09-01 11:57:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:57:24,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:24,868 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:24,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 11:57:25,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:57:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:57:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:25,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:25,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-09-01 11:57:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:25,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:25,469 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:57:25,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:57:25,485 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:57:25,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:57:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52782041] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:25,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:57:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686061286] [2023-09-01 11:57:25,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:25,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:57:25,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:57:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:57:26,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:57:26,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 755 transitions, 36574 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:26,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:26,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:57:26,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:29,162 INFO L130 PetriNetUnfolder]: 3311/5895 cut-off events. [2023-09-01 11:57:29,162 INFO L131 PetriNetUnfolder]: For 645417/645417 co-relation queries the response was YES. [2023-09-01 11:57:29,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117146 conditions, 5895 events. 3311/5895 cut-off events. For 645417/645417 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 42097 event pairs, 588 based on Foata normal form. 8/5903 useless extension candidates. Maximal degree in co-relation 116952. Up to 3233 conditions per place. [2023-09-01 11:57:29,256 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 352 selfloop transitions, 440 changer transitions 7/799 dead transitions. [2023-09-01 11:57:29,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 799 transitions, 38826 flow [2023-09-01 11:57:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 11:57:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 11:57:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2772 transitions. [2023-09-01 11:57:29,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791411042944784 [2023-09-01 11:57:29,258 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2772 transitions. [2023-09-01 11:57:29,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2772 transitions. [2023-09-01 11:57:29,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:29,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2772 transitions. [2023-09-01 11:57:29,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 184.8) internal successors, (2772), 15 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:29,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:29,263 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:29,263 INFO L175 Difference]: Start difference. First operand has 481 places, 755 transitions, 36574 flow. Second operand 15 states and 2772 transitions. [2023-09-01 11:57:29,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 799 transitions, 38826 flow [2023-09-01 11:57:31,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 799 transitions, 37541 flow, removed 149 selfloop flow, removed 11 redundant places. [2023-09-01 11:57:31,922 INFO L231 Difference]: Finished difference. Result has 483 places, 752 transitions, 36095 flow [2023-09-01 11:57:31,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=35235, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=36095, PETRI_PLACES=483, PETRI_TRANSITIONS=752} [2023-09-01 11:57:31,923 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 460 predicate places. [2023-09-01 11:57:31,924 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 752 transitions, 36095 flow [2023-09-01 11:57:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:31,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:31,925 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:31,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:32,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-09-01 11:57:32,134 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:32,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1165633259, now seen corresponding path program 55 times [2023-09-01 11:57:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:32,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771462952] [2023-09-01 11:57:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:32,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771462952] [2023-09-01 11:57:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771462952] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053485284] [2023-09-01 11:57:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:57:32,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:32,711 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:32,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-09-01 11:57:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 11:57:32,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:57:33,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:57:33,228 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:57:33,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:57:33,236 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:57:33,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:57:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:33,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:33,527 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4237 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4237))) (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset)))))) (forall ((v_ArrVal_4237 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4237))) (let ((.cse2 (select .cse1 ~o_2~0.base))) (or (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse2 c_~o_2~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse2 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))))))) is different from false [2023-09-01 11:57:33,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:33,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-09-01 11:57:33,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:33,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:57:33,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:33,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:57:33,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:33,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:57:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053485284] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:34,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:34,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-09-01 11:57:34,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834521931] [2023-09-01 11:57:34,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 11:57:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 11:57:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=609, Unknown=1, NotChecked=50, Total=756 [2023-09-01 11:57:34,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-09-01 11:57:34,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 752 transitions, 36095 flow. Second operand has 28 states, 28 states have (on average 160.75) internal successors, (4501), 28 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:34,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:34,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-09-01 11:57:34,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:41,496 INFO L130 PetriNetUnfolder]: 3403/6057 cut-off events. [2023-09-01 11:57:41,497 INFO L131 PetriNetUnfolder]: For 675749/675749 co-relation queries the response was YES. [2023-09-01 11:57:41,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119753 conditions, 6057 events. 3403/6057 cut-off events. For 675749/675749 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43490 event pairs, 498 based on Foata normal form. 8/6065 useless extension candidates. Maximal degree in co-relation 119560. Up to 2859 conditions per place. [2023-09-01 11:57:41,592 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 337 selfloop transitions, 490 changer transitions 5/832 dead transitions. [2023-09-01 11:57:41,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 832 transitions, 39683 flow [2023-09-01 11:57:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 11:57:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 11:57:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3122 transitions. [2023-09-01 11:57:41,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3360241093531374 [2023-09-01 11:57:41,594 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3122 transitions. [2023-09-01 11:57:41,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3122 transitions. [2023-09-01 11:57:41,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:41,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3122 transitions. [2023-09-01 11:57:41,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 164.31578947368422) internal successors, (3122), 19 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,601 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 489.0) internal successors, (9780), 20 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:41,601 INFO L175 Difference]: Start difference. First operand has 483 places, 752 transitions, 36095 flow. Second operand 19 states and 3122 transitions. [2023-09-01 11:57:41,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 832 transitions, 39683 flow [2023-09-01 11:57:44,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 832 transitions, 38834 flow, removed 37 selfloop flow, removed 17 redundant places. [2023-09-01 11:57:44,205 INFO L231 Difference]: Finished difference. Result has 485 places, 769 transitions, 37327 flow [2023-09-01 11:57:44,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=35299, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=37327, PETRI_PLACES=485, PETRI_TRANSITIONS=769} [2023-09-01 11:57:44,206 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 462 predicate places. [2023-09-01 11:57:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 769 transitions, 37327 flow [2023-09-01 11:57:44,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.75) internal successors, (4501), 28 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:44,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:57:44,207 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:57:44,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-09-01 11:57:44,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-09-01 11:57:44,408 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:57:44,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:57:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1142305331, now seen corresponding path program 56 times [2023-09-01 11:57:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:57:44,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205307617] [2023-09-01 11:57:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:57:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:57:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:57:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:44,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:57:44,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205307617] [2023-09-01 11:57:44,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205307617] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:57:44,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367090951] [2023-09-01 11:57:44,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:57:44,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:57:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:57:44,967 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:57:44,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-09-01 11:57:45,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:57:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:57:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 11:57:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:57:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:57:45,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:57:45,586 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:57:45,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2023-09-01 11:57:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:45,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:57:45,885 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4308 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4308))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4308 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4308))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-09-01 11:57:45,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:45,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:57:45,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:57:45,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:57:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:57:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367090951] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:57:46,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:57:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-09-01 11:57:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605261081] [2023-09-01 11:57:46,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:57:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:57:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:57:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:57:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=766, Unknown=1, NotChecked=56, Total=930 [2023-09-01 11:57:46,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-09-01 11:57:46,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 769 transitions, 37327 flow. Second operand has 31 states, 31 states have (on average 157.83870967741936) internal successors, (4893), 31 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:46,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:57:46,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-09-01 11:57:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:57:48,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:57:51,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:57:53,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:57:55,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 11:57:57,969 INFO L130 PetriNetUnfolder]: 3395/6049 cut-off events. [2023-09-01 11:57:57,969 INFO L131 PetriNetUnfolder]: For 673005/673005 co-relation queries the response was YES. [2023-09-01 11:57:58,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120559 conditions, 6049 events. 3395/6049 cut-off events. For 673005/673005 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 43436 event pairs, 254 based on Foata normal form. 8/6057 useless extension candidates. Maximal degree in co-relation 120364. Up to 4048 conditions per place. [2023-09-01 11:57:58,068 INFO L137 encePairwiseOnDemand]: 477/489 looper letters, 299 selfloop transitions, 488 changer transitions 11/798 dead transitions. [2023-09-01 11:57:58,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 798 transitions, 39148 flow [2023-09-01 11:57:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 11:57:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 11:57:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2259 transitions. [2023-09-01 11:57:58,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3299737072743208 [2023-09-01 11:57:58,070 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2259 transitions. [2023-09-01 11:57:58,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2259 transitions. [2023-09-01 11:57:58,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:57:58,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2259 transitions. [2023-09-01 11:57:58,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.35714285714286) internal successors, (2259), 14 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:58,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:58,074 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:57:58,074 INFO L175 Difference]: Start difference. First operand has 485 places, 769 transitions, 37327 flow. Second operand 14 states and 2259 transitions. [2023-09-01 11:57:58,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 798 transitions, 39148 flow [2023-09-01 11:58:00,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 798 transitions, 37959 flow, removed 61 selfloop flow, removed 13 redundant places. [2023-09-01 11:58:00,724 INFO L231 Difference]: Finished difference. Result has 487 places, 769 transitions, 37130 flow [2023-09-01 11:58:00,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36138, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=37130, PETRI_PLACES=487, PETRI_TRANSITIONS=769} [2023-09-01 11:58:00,725 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-09-01 11:58:00,725 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 769 transitions, 37130 flow [2023-09-01 11:58:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.83870967741936) internal successors, (4893), 31 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:00,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:00,726 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:00,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:00,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:00,927 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:00,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1271141633, now seen corresponding path program 57 times [2023-09-01 11:58:00,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:00,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816906601] [2023-09-01 11:58:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:00,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:01,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816906601] [2023-09-01 11:58:01,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816906601] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272629900] [2023-09-01 11:58:01,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:58:01,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:01,475 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:01,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-09-01 11:58:01,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:58:01,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 11:58:01,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:58:01,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:58:02,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:02,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:58:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:02,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:02,369 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_4379 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4379))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_4379 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4379))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-09-01 11:58:02,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:02,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:58:02,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:02,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:58:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:02,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272629900] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:02,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:02,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 28 [2023-09-01 11:58:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78012848] [2023-09-01 11:58:02,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:02,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 11:58:02,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 11:58:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=650, Unknown=1, NotChecked=52, Total=812 [2023-09-01 11:58:02,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-09-01 11:58:02,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 769 transitions, 37130 flow. Second operand has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:02,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:02,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-09-01 11:58:02,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:05,850 INFO L130 PetriNetUnfolder]: 3397/6041 cut-off events. [2023-09-01 11:58:05,850 INFO L131 PetriNetUnfolder]: For 672711/672711 co-relation queries the response was YES. [2023-09-01 11:58:05,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120762 conditions, 6041 events. 3397/6041 cut-off events. For 672711/672711 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 43356 event pairs, 508 based on Foata normal form. 8/6049 useless extension candidates. Maximal degree in co-relation 120564. Up to 2937 conditions per place. [2023-09-01 11:58:06,019 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 341 selfloop transitions, 465 changer transitions 6/812 dead transitions. [2023-09-01 11:58:06,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 812 transitions, 39489 flow [2023-09-01 11:58:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:58:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:58:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2138 transitions. [2023-09-01 11:58:06,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33632216454302344 [2023-09-01 11:58:06,021 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2138 transitions. [2023-09-01 11:58:06,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2138 transitions. [2023-09-01 11:58:06,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:06,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2138 transitions. [2023-09-01 11:58:06,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.46153846153845) internal successors, (2138), 13 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:06,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:06,025 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:06,025 INFO L175 Difference]: Start difference. First operand has 487 places, 769 transitions, 37130 flow. Second operand 13 states and 2138 transitions. [2023-09-01 11:58:06,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 812 transitions, 39489 flow [2023-09-01 11:58:08,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 812 transitions, 38729 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-09-01 11:58:08,615 INFO L231 Difference]: Finished difference. Result has 486 places, 770 transitions, 37440 flow [2023-09-01 11:58:08,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36383, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=37440, PETRI_PLACES=486, PETRI_TRANSITIONS=770} [2023-09-01 11:58:08,615 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 463 predicate places. [2023-09-01 11:58:08,616 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 770 transitions, 37440 flow [2023-09-01 11:58:08,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 160.79310344827587) internal successors, (4663), 29 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:08,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:08,616 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:08,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:08,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:08,817 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:08,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:08,817 INFO L85 PathProgramCache]: Analyzing trace with hash 894158783, now seen corresponding path program 58 times [2023-09-01 11:58:08,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:08,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369408767] [2023-09-01 11:58:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:08,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369408767] [2023-09-01 11:58:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369408767] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838748559] [2023-09-01 11:58:09,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:58:09,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:09,312 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:09,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-09-01 11:58:09,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:58:09,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 66 conjunts are in the unsatisfiable core [2023-09-01 11:58:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:58:09,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:58:09,913 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:58:09,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:58:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:09,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:10,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-09-01 11:58:10,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:10,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:58:10,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:10,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:58:10,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:10,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:58:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:11,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838748559] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:11,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:11,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 31 [2023-09-01 11:58:11,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97868517] [2023-09-01 11:58:11,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:11,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 11:58:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 11:58:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=851, Unknown=23, NotChecked=0, Total=992 [2023-09-01 11:58:13,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-09-01 11:58:13,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 770 transitions, 37440 flow. Second operand has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:13,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:13,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-09-01 11:58:13,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:16,470 INFO L130 PetriNetUnfolder]: 3449/6125 cut-off events. [2023-09-01 11:58:16,470 INFO L131 PetriNetUnfolder]: For 685515/685515 co-relation queries the response was YES. [2023-09-01 11:58:16,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123840 conditions, 6125 events. 3449/6125 cut-off events. For 685515/685515 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 43878 event pairs, 238 based on Foata normal form. 20/6145 useless extension candidates. Maximal degree in co-relation 123644. Up to 3890 conditions per place. [2023-09-01 11:58:16,578 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 320 selfloop transitions, 502 changer transitions 1/823 dead transitions. [2023-09-01 11:58:16,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 823 transitions, 40576 flow [2023-09-01 11:58:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:58:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:58:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2740 transitions. [2023-09-01 11:58:16,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296042343317695 [2023-09-01 11:58:16,580 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2740 transitions. [2023-09-01 11:58:16,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2740 transitions. [2023-09-01 11:58:16,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:16,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2740 transitions. [2023-09-01 11:58:16,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 161.1764705882353) internal successors, (2740), 17 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:16,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:16,586 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:16,586 INFO L175 Difference]: Start difference. First operand has 486 places, 770 transitions, 37440 flow. Second operand 17 states and 2740 transitions. [2023-09-01 11:58:16,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 823 transitions, 40576 flow [2023-09-01 11:58:19,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 823 transitions, 40110 flow, removed 18 selfloop flow, removed 13 redundant places. [2023-09-01 11:58:19,408 INFO L231 Difference]: Finished difference. Result has 493 places, 783 transitions, 39551 flow [2023-09-01 11:58:19,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=36923, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=39551, PETRI_PLACES=493, PETRI_TRANSITIONS=783} [2023-09-01 11:58:19,409 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 470 predicate places. [2023-09-01 11:58:19,409 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 783 transitions, 39551 flow [2023-09-01 11:58:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.78125) internal successors, (5049), 32 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:19,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:19,410 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:19,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:19,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-09-01 11:58:19,610 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:19,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash -482136279, now seen corresponding path program 59 times [2023-09-01 11:58:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555107354] [2023-09-01 11:58:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555107354] [2023-09-01 11:58:20,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555107354] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638398784] [2023-09-01 11:58:20,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:58:20,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:20,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:20,169 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:20,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-09-01 11:58:20,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:58:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 11:58:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:58:20,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:58:20,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:20,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2023-09-01 11:58:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:20,981 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4521 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4521))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (not (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4521 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4521))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-09-01 11:58:20,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:20,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-09-01 11:58:20,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:20,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:58:21,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:21,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:58:21,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:21,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:58:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638398784] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:21,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:21,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-09-01 11:58:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050594439] [2023-09-01 11:58:21,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:21,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:58:21,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:58:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=768, Unknown=1, NotChecked=56, Total=930 [2023-09-01 11:58:21,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-09-01 11:58:21,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 783 transitions, 39551 flow. Second operand has 31 states, 31 states have (on average 160.70967741935485) internal successors, (4982), 31 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:21,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:21,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-09-01 11:58:21,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:25,010 INFO L130 PetriNetUnfolder]: 3429/6085 cut-off events. [2023-09-01 11:58:25,010 INFO L131 PetriNetUnfolder]: For 751167/751167 co-relation queries the response was YES. [2023-09-01 11:58:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126927 conditions, 6085 events. 3429/6085 cut-off events. For 751167/751167 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 43545 event pairs, 544 based on Foata normal form. 8/6093 useless extension candidates. Maximal degree in co-relation 126730. Up to 3191 conditions per place. [2023-09-01 11:58:25,118 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 358 selfloop transitions, 457 changer transitions 7/822 dead transitions. [2023-09-01 11:58:25,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 822 transitions, 41754 flow [2023-09-01 11:58:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:58:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:58:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2782 transitions. [2023-09-01 11:58:25,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346565620113076 [2023-09-01 11:58:25,120 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2782 transitions. [2023-09-01 11:58:25,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2782 transitions. [2023-09-01 11:58:25,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:25,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2782 transitions. [2023-09-01 11:58:25,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 163.64705882352942) internal successors, (2782), 17 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:25,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:25,125 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:25,125 INFO L175 Difference]: Start difference. First operand has 493 places, 783 transitions, 39551 flow. Second operand 17 states and 2782 transitions. [2023-09-01 11:58:25,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 822 transitions, 41754 flow [2023-09-01 11:58:28,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 822 transitions, 41360 flow, removed 66 selfloop flow, removed 9 redundant places. [2023-09-01 11:58:28,040 INFO L231 Difference]: Finished difference. Result has 500 places, 780 transitions, 40029 flow [2023-09-01 11:58:28,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39129, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=40029, PETRI_PLACES=500, PETRI_TRANSITIONS=780} [2023-09-01 11:58:28,041 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 477 predicate places. [2023-09-01 11:58:28,041 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 780 transitions, 40029 flow [2023-09-01 11:58:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 160.70967741935485) internal successors, (4982), 31 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:28,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:28,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:28,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-09-01 11:58:28,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-09-01 11:58:28,242 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:28,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash 888358531, now seen corresponding path program 60 times [2023-09-01 11:58:28,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:28,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767309676] [2023-09-01 11:58:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:28,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:28,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767309676] [2023-09-01 11:58:28,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767309676] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679247476] [2023-09-01 11:58:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:58:28,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:28,871 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:28,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-09-01 11:58:29,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 11:58:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2023-09-01 11:58:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 11:58:29,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 11:58:29,491 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 11:58:29,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-09-01 11:58:29,499 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:58:29,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:58:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:29,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:29,903 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4592 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4592))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (not (= (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset) (select .cse0 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_4592 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4592))) (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset))))))) is different from false [2023-09-01 11:58:29,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:29,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2023-09-01 11:58:29,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:29,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-09-01 11:58:29,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:29,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 144 [2023-09-01 11:58:29,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:58:29,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-09-01 11:58:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:30,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679247476] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:30,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:30,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-09-01 11:58:30,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812453362] [2023-09-01 11:58:30,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:30,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 11:58:30,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 11:58:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=764, Unknown=1, NotChecked=56, Total=930 [2023-09-01 11:58:30,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 489 [2023-09-01 11:58:30,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 780 transitions, 40029 flow. Second operand has 31 states, 31 states have (on average 157.80645161290323) internal successors, (4892), 31 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:30,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:30,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 489 [2023-09-01 11:58:30,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:34,241 INFO L130 PetriNetUnfolder]: 3413/6049 cut-off events. [2023-09-01 11:58:34,242 INFO L131 PetriNetUnfolder]: For 746462/746462 co-relation queries the response was YES. [2023-09-01 11:58:34,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127787 conditions, 6049 events. 3413/6049 cut-off events. For 746462/746462 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 43146 event pairs, 184 based on Foata normal form. 34/6083 useless extension candidates. Maximal degree in co-relation 127590. Up to 2990 conditions per place. [2023-09-01 11:58:34,355 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 373 selfloop transitions, 447 changer transitions 19/839 dead transitions. [2023-09-01 11:58:34,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 839 transitions, 42490 flow [2023-09-01 11:58:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 11:58:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 11:58:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3223 transitions. [2023-09-01 11:58:34,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295501022494888 [2023-09-01 11:58:34,358 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3223 transitions. [2023-09-01 11:58:34,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3223 transitions. [2023-09-01 11:58:34,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:34,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3223 transitions. [2023-09-01 11:58:34,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 161.15) internal successors, (3223), 20 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:34,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:34,365 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 489.0) internal successors, (10269), 21 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:34,365 INFO L175 Difference]: Start difference. First operand has 500 places, 780 transitions, 40029 flow. Second operand 20 states and 3223 transitions. [2023-09-01 11:58:34,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 839 transitions, 42490 flow [2023-09-01 11:58:37,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 839 transitions, 41782 flow, removed 23 selfloop flow, removed 14 redundant places. [2023-09-01 11:58:37,293 INFO L231 Difference]: Finished difference. Result has 508 places, 778 transitions, 40113 flow [2023-09-01 11:58:37,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=38862, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=40113, PETRI_PLACES=508, PETRI_TRANSITIONS=778} [2023-09-01 11:58:37,294 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 485 predicate places. [2023-09-01 11:58:37,295 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 778 transitions, 40113 flow [2023-09-01 11:58:37,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 157.80645161290323) internal successors, (4892), 31 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:37,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:37,296 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:37,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:37,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:37,502 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:37,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:37,502 INFO L85 PathProgramCache]: Analyzing trace with hash -309870027, now seen corresponding path program 61 times [2023-09-01 11:58:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:37,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202453882] [2023-09-01 11:58:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:37,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:37,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202453882] [2023-09-01 11:58:37,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202453882] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409206888] [2023-09-01 11:58:37,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:58:37,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:37,891 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:37,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-09-01 11:58:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:58:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:38,340 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:58:38,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-09-01 11:58:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:38,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:38,500 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:58:38,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:58:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:38,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409206888] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:38,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:38,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-09-01 11:58:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61206683] [2023-09-01 11:58:38,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:38,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:58:38,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:38,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:58:38,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:58:39,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:58:39,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 778 transitions, 40113 flow. Second operand has 18 states, 18 states have (on average 183.33333333333334) internal successors, (3300), 18 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:39,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:39,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:58:39,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:42,236 INFO L130 PetriNetUnfolder]: 3717/6567 cut-off events. [2023-09-01 11:58:42,236 INFO L131 PetriNetUnfolder]: For 779721/779721 co-relation queries the response was YES. [2023-09-01 11:58:42,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137728 conditions, 6567 events. 3717/6567 cut-off events. For 779721/779721 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 47113 event pairs, 466 based on Foata normal form. 28/6595 useless extension candidates. Maximal degree in co-relation 137526. Up to 2280 conditions per place. [2023-09-01 11:58:42,342 INFO L137 encePairwiseOnDemand]: 480/489 looper letters, 544 selfloop transitions, 352 changer transitions 2/898 dead transitions. [2023-09-01 11:58:42,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 898 transitions, 46149 flow [2023-09-01 11:58:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:58:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:58:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2257 transitions. [2023-09-01 11:58:42,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38462849352419903 [2023-09-01 11:58:42,343 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2257 transitions. [2023-09-01 11:58:42,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2257 transitions. [2023-09-01 11:58:42,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:42,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2257 transitions. [2023-09-01 11:58:42,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.08333333333334) internal successors, (2257), 12 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:42,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:42,348 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 489.0) internal successors, (6357), 13 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:42,348 INFO L175 Difference]: Start difference. First operand has 508 places, 778 transitions, 40113 flow. Second operand 12 states and 2257 transitions. [2023-09-01 11:58:42,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 898 transitions, 46149 flow [2023-09-01 11:58:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 898 transitions, 45487 flow, removed 136 selfloop flow, removed 12 redundant places. [2023-09-01 11:58:45,607 INFO L231 Difference]: Finished difference. Result has 505 places, 792 transitions, 40917 flow [2023-09-01 11:58:45,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=39518, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=40917, PETRI_PLACES=505, PETRI_TRANSITIONS=792} [2023-09-01 11:58:45,608 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 482 predicate places. [2023-09-01 11:58:45,609 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 792 transitions, 40917 flow [2023-09-01 11:58:45,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.33333333333334) internal successors, (3300), 18 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:45,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:45,609 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:45,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-09-01 11:58:45,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-09-01 11:58:45,810 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:45,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash 332522005, now seen corresponding path program 62 times [2023-09-01 11:58:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236397954] [2023-09-01 11:58:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:46,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236397954] [2023-09-01 11:58:46,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236397954] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189887724] [2023-09-01 11:58:46,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:58:46,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:46,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:46,315 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:46,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-09-01 11:58:46,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:58:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 11:58:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:46,887 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:58:46,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 11:58:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:46,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:47,245 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:58:47,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:58:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189887724] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:47,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:47,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 26 [2023-09-01 11:58:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353577349] [2023-09-01 11:58:47,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:47,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 11:58:47,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:47,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 11:58:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-09-01 11:58:48,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:58:48,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 792 transitions, 40917 flow. Second operand has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:48,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:48,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:58:48,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:58:52,215 INFO L130 PetriNetUnfolder]: 3895/6881 cut-off events. [2023-09-01 11:58:52,215 INFO L131 PetriNetUnfolder]: For 812140/812140 co-relation queries the response was YES. [2023-09-01 11:58:52,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143463 conditions, 6881 events. 3895/6881 cut-off events. For 812140/812140 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 49799 event pairs, 231 based on Foata normal form. 60/6941 useless extension candidates. Maximal degree in co-relation 143256. Up to 2902 conditions per place. [2023-09-01 11:58:52,334 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 320 selfloop transitions, 572 changer transitions 2/894 dead transitions. [2023-09-01 11:58:52,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 894 transitions, 45361 flow [2023-09-01 11:58:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 11:58:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 11:58:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4384 transitions. [2023-09-01 11:58:52,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37355146557600544 [2023-09-01 11:58:52,337 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4384 transitions. [2023-09-01 11:58:52,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4384 transitions. [2023-09-01 11:58:52,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:58:52,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4384 transitions. [2023-09-01 11:58:52,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 182.66666666666666) internal successors, (4384), 24 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:52,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:52,345 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 489.0) internal successors, (12225), 25 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:52,345 INFO L175 Difference]: Start difference. First operand has 505 places, 792 transitions, 40917 flow. Second operand 24 states and 4384 transitions. [2023-09-01 11:58:52,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 894 transitions, 45361 flow [2023-09-01 11:58:56,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 894 transitions, 44947 flow, removed 81 selfloop flow, removed 9 redundant places. [2023-09-01 11:58:56,285 INFO L231 Difference]: Finished difference. Result has 527 places, 831 transitions, 43966 flow [2023-09-01 11:58:56,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=40503, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=43966, PETRI_PLACES=527, PETRI_TRANSITIONS=831} [2023-09-01 11:58:56,286 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 504 predicate places. [2023-09-01 11:58:56,286 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 831 transitions, 43966 flow [2023-09-01 11:58:56,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 179.0) internal successors, (4654), 26 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:56,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:58:56,287 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:58:56,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-09-01 11:58:56,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:56,488 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:58:56,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:58:56,488 INFO L85 PathProgramCache]: Analyzing trace with hash 825323069, now seen corresponding path program 63 times [2023-09-01 11:58:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:58:56,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771537472] [2023-09-01 11:58:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:58:56,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:58:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:58:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:57,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:58:57,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771537472] [2023-09-01 11:58:57,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771537472] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:58:57,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650688659] [2023-09-01 11:58:57,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:58:57,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:58:57,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:58:57,033 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:58:57,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-09-01 11:58:57,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:58:57,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:58:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 11:58:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:58:57,604 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:58:57,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 23 [2023-09-01 11:58:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:57,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:58:57,779 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:58:57,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:58:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:58:57,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650688659] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:58:57,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:58:57,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-09-01 11:58:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609864931] [2023-09-01 11:58:57,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:58:57,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 11:58:57,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:58:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 11:58:57,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-09-01 11:58:58,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 11:58:58,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 831 transitions, 43966 flow. Second operand has 19 states, 19 states have (on average 181.31578947368422) internal successors, (3445), 19 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:58:58,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:58:58,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 11:58:58,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:01,608 INFO L130 PetriNetUnfolder]: 3967/7005 cut-off events. [2023-09-01 11:59:01,608 INFO L131 PetriNetUnfolder]: For 948597/948597 co-relation queries the response was YES. [2023-09-01 11:59:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148872 conditions, 7005 events. 3967/7005 cut-off events. For 948597/948597 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 51041 event pairs, 1432 based on Foata normal form. 20/7025 useless extension candidates. Maximal degree in co-relation 148656. Up to 6221 conditions per place. [2023-09-01 11:59:01,726 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 688 selfloop transitions, 179 changer transitions 1/868 dead transitions. [2023-09-01 11:59:01,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 868 transitions, 46788 flow [2023-09-01 11:59:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:59:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:59:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1849 transitions. [2023-09-01 11:59:01,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37811860940695297 [2023-09-01 11:59:01,728 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1849 transitions. [2023-09-01 11:59:01,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1849 transitions. [2023-09-01 11:59:01,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:01,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1849 transitions. [2023-09-01 11:59:01,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.9) internal successors, (1849), 10 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:01,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:01,732 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:01,732 INFO L175 Difference]: Start difference. First operand has 527 places, 831 transitions, 43966 flow. Second operand 10 states and 1849 transitions. [2023-09-01 11:59:01,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 868 transitions, 46788 flow [2023-09-01 11:59:05,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 868 transitions, 45394 flow, removed 217 selfloop flow, removed 11 redundant places. [2023-09-01 11:59:05,468 INFO L231 Difference]: Finished difference. Result has 527 places, 843 transitions, 43444 flow [2023-09-01 11:59:05,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=42602, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=43444, PETRI_PLACES=527, PETRI_TRANSITIONS=843} [2023-09-01 11:59:05,469 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 504 predicate places. [2023-09-01 11:59:05,469 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 843 transitions, 43444 flow [2023-09-01 11:59:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 181.31578947368422) internal successors, (3445), 19 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:05,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:05,470 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:05,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:05,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:05,670 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:05,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:05,671 INFO L85 PathProgramCache]: Analyzing trace with hash -499439099, now seen corresponding path program 64 times [2023-09-01 11:59:05,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:05,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815627678] [2023-09-01 11:59:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:06,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815627678] [2023-09-01 11:59:06,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815627678] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688521911] [2023-09-01 11:59:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 11:59:06,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:06,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:06,140 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:06,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-09-01 11:59:06,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 11:59:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 11:59:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:06,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:06,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:59:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:06,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:06,894 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-09-01 11:59:06,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-09-01 11:59:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:06,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688521911] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:06,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:06,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 11:59:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66203310] [2023-09-01 11:59:06,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 11:59:06,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 11:59:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-09-01 11:59:08,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 11:59:08,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 843 transitions, 43444 flow. Second operand has 22 states, 22 states have (on average 179.22727272727272) internal successors, (3943), 22 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:08,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:08,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 11:59:08,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:11,835 INFO L130 PetriNetUnfolder]: 3955/6969 cut-off events. [2023-09-01 11:59:11,836 INFO L131 PetriNetUnfolder]: For 905544/905544 co-relation queries the response was YES. [2023-09-01 11:59:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146045 conditions, 6969 events. 3955/6969 cut-off events. For 905544/905544 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 50551 event pairs, 302 based on Foata normal form. 4/6973 useless extension candidates. Maximal degree in co-relation 145830. Up to 4734 conditions per place. [2023-09-01 11:59:12,171 INFO L137 encePairwiseOnDemand]: 481/489 looper letters, 330 selfloop transitions, 541 changer transitions 3/874 dead transitions. [2023-09-01 11:59:12,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 874 transitions, 45478 flow [2023-09-01 11:59:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 11:59:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 11:59:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3093 transitions. [2023-09-01 11:59:12,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3720678455431252 [2023-09-01 11:59:12,174 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3093 transitions. [2023-09-01 11:59:12,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3093 transitions. [2023-09-01 11:59:12,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:12,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3093 transitions. [2023-09-01 11:59:12,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 181.94117647058823) internal successors, (3093), 17 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:12,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:12,179 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 489.0) internal successors, (8802), 18 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:12,179 INFO L175 Difference]: Start difference. First operand has 527 places, 843 transitions, 43444 flow. Second operand 17 states and 3093 transitions. [2023-09-01 11:59:12,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 874 transitions, 45478 flow [2023-09-01 11:59:16,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 874 transitions, 45007 flow, removed 67 selfloop flow, removed 6 redundant places. [2023-09-01 11:59:16,206 INFO L231 Difference]: Finished difference. Result has 539 places, 844 transitions, 44604 flow [2023-09-01 11:59:16,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=42804, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=44604, PETRI_PLACES=539, PETRI_TRANSITIONS=844} [2023-09-01 11:59:16,207 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 516 predicate places. [2023-09-01 11:59:16,207 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 844 transitions, 44604 flow [2023-09-01 11:59:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 179.22727272727272) internal successors, (3943), 22 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:16,208 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:16,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:16,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-09-01 11:59:16,408 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:16,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:16,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2019952155, now seen corresponding path program 65 times [2023-09-01 11:59:16,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:16,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255714545] [2023-09-01 11:59:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:16,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255714545] [2023-09-01 11:59:16,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255714545] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406172581] [2023-09-01 11:59:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 11:59:16,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:16,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:16,919 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:16,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-09-01 11:59:17,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 11:59:17,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 11:59:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:17,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:17,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 59 [2023-09-01 11:59:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:17,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:17,646 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:59:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-09-01 11:59:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:17,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406172581] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:17,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:17,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 25 [2023-09-01 11:59:17,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072033583] [2023-09-01 11:59:17,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:17,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 11:59:17,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 11:59:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2023-09-01 11:59:18,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 11:59:18,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 844 transitions, 44604 flow. Second operand has 25 states, 25 states have (on average 181.16) internal successors, (4529), 25 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:18,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:18,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 11:59:18,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:21,751 INFO L130 PetriNetUnfolder]: 3975/7017 cut-off events. [2023-09-01 11:59:21,751 INFO L131 PetriNetUnfolder]: For 960502/960502 co-relation queries the response was YES. [2023-09-01 11:59:21,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149647 conditions, 7017 events. 3975/7017 cut-off events. For 960502/960502 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 51132 event pairs, 1460 based on Foata normal form. 20/7037 useless extension candidates. Maximal degree in co-relation 149430. Up to 6261 conditions per place. [2023-09-01 11:59:21,880 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 708 selfloop transitions, 155 changer transitions 0/863 dead transitions. [2023-09-01 11:59:21,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 863 transitions, 46676 flow [2023-09-01 11:59:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:59:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:59:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1848 transitions. [2023-09-01 11:59:21,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791411042944784 [2023-09-01 11:59:21,882 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1848 transitions. [2023-09-01 11:59:21,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1848 transitions. [2023-09-01 11:59:21,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:21,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1848 transitions. [2023-09-01 11:59:21,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 184.8) internal successors, (1848), 10 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:21,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:21,885 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:21,885 INFO L175 Difference]: Start difference. First operand has 539 places, 844 transitions, 44604 flow. Second operand 10 states and 1848 transitions. [2023-09-01 11:59:21,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 863 transitions, 46676 flow [2023-09-01 11:59:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 863 transitions, 46402 flow, removed 7 selfloop flow, removed 10 redundant places. [2023-09-01 11:59:25,772 INFO L231 Difference]: Finished difference. Result has 537 places, 846 transitions, 44766 flow [2023-09-01 11:59:25,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44230, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=44766, PETRI_PLACES=537, PETRI_TRANSITIONS=846} [2023-09-01 11:59:25,773 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 514 predicate places. [2023-09-01 11:59:25,773 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 846 transitions, 44766 flow [2023-09-01 11:59:25,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 181.16) internal successors, (4529), 25 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:25,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:25,773 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:25,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:25,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:25,974 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:25,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1724191649, now seen corresponding path program 66 times [2023-09-01 11:59:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:25,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076191613] [2023-09-01 11:59:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:25,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076191613] [2023-09-01 11:59:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076191613] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593127814] [2023-09-01 11:59:26,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 11:59:26,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:26,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:26,482 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:26,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-09-01 11:59:26,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 11:59:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:59:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:27,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:27,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:59:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:27,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:27,238 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:59:27,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:59:27,272 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:59:27,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:59:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:27,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593127814] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:27,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:27,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-09-01 11:59:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981863338] [2023-09-01 11:59:27,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:27,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:59:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:59:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:59:28,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:59:28,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 846 transitions, 44766 flow. Second operand has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:28,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:28,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:59:28,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:31,464 INFO L130 PetriNetUnfolder]: 3999/7077 cut-off events. [2023-09-01 11:59:31,464 INFO L131 PetriNetUnfolder]: For 971870/971870 co-relation queries the response was YES. [2023-09-01 11:59:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151090 conditions, 7077 events. 3999/7077 cut-off events. For 971870/971870 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 51900 event pairs, 1487 based on Foata normal form. 20/7097 useless extension candidates. Maximal degree in co-relation 150872. Up to 6311 conditions per place. [2023-09-01 11:59:31,752 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 717 selfloop transitions, 150 changer transitions 0/867 dead transitions. [2023-09-01 11:59:31,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 867 transitions, 46998 flow [2023-09-01 11:59:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 11:59:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 11:59:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1857 transitions. [2023-09-01 11:59:31,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37975460122699384 [2023-09-01 11:59:31,754 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1857 transitions. [2023-09-01 11:59:31,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1857 transitions. [2023-09-01 11:59:31,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:31,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1857 transitions. [2023-09-01 11:59:31,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.7) internal successors, (1857), 10 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:31,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:31,757 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:31,757 INFO L175 Difference]: Start difference. First operand has 537 places, 846 transitions, 44766 flow. Second operand 10 states and 1857 transitions. [2023-09-01 11:59:31,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 867 transitions, 46998 flow [2023-09-01 11:59:35,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 867 transitions, 46578 flow, removed 60 selfloop flow, removed 7 redundant places. [2023-09-01 11:59:35,593 INFO L231 Difference]: Finished difference. Result has 541 places, 850 transitions, 44888 flow [2023-09-01 11:59:35,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44346, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=44888, PETRI_PLACES=541, PETRI_TRANSITIONS=850} [2023-09-01 11:59:35,594 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 518 predicate places. [2023-09-01 11:59:35,594 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 850 transitions, 44888 flow [2023-09-01 11:59:35,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:35,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:35,595 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:35,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:35,795 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:35,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1259857799, now seen corresponding path program 67 times [2023-09-01 11:59:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036727750] [2023-09-01 11:59:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:36,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036727750] [2023-09-01 11:59:36,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036727750] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:36,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884944394] [2023-09-01 11:59:36,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 11:59:36,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:36,307 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:36,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-09-01 11:59:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:36,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:59:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:36,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:36,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 11:59:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:36,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:36,967 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:59:36,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:59:37,002 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:59:37,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:59:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884944394] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:37,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:37,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-09-01 11:59:37,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508565379] [2023-09-01 11:59:37,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:37,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:59:37,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:59:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:59:37,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 11:59:37,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 850 transitions, 44888 flow. Second operand has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:37,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:37,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 11:59:37,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:41,374 INFO L130 PetriNetUnfolder]: 4029/7163 cut-off events. [2023-09-01 11:59:41,374 INFO L131 PetriNetUnfolder]: For 982729/982729 co-relation queries the response was YES. [2023-09-01 11:59:41,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152588 conditions, 7163 events. 4029/7163 cut-off events. For 982729/982729 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 52868 event pairs, 1492 based on Foata normal form. 20/7183 useless extension candidates. Maximal degree in co-relation 152368. Up to 6361 conditions per place. [2023-09-01 11:59:41,504 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 720 selfloop transitions, 158 changer transitions 0/878 dead transitions. [2023-09-01 11:59:41,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 878 transitions, 47286 flow [2023-09-01 11:59:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 11:59:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 11:59:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2411 transitions. [2023-09-01 11:59:41,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37926694981909703 [2023-09-01 11:59:41,506 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2411 transitions. [2023-09-01 11:59:41,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2411 transitions. [2023-09-01 11:59:41,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:41,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2411 transitions. [2023-09-01 11:59:41,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.46153846153845) internal successors, (2411), 13 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:41,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:41,510 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:41,510 INFO L175 Difference]: Start difference. First operand has 541 places, 850 transitions, 44888 flow. Second operand 13 states and 2411 transitions. [2023-09-01 11:59:41,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 878 transitions, 47286 flow [2023-09-01 11:59:45,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 878 transitions, 46880 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-09-01 11:59:45,694 INFO L231 Difference]: Finished difference. Result has 547 places, 854 transitions, 45116 flow [2023-09-01 11:59:45,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44472, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=45116, PETRI_PLACES=547, PETRI_TRANSITIONS=854} [2023-09-01 11:59:45,695 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 524 predicate places. [2023-09-01 11:59:45,695 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 854 transitions, 45116 flow [2023-09-01 11:59:45,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:45,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:45,696 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:45,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-09-01 11:59:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:45,897 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:45,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1818498919, now seen corresponding path program 68 times [2023-09-01 11:59:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411805290] [2023-09-01 11:59:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:46,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411805290] [2023-09-01 11:59:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411805290] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896488975] [2023-09-01 11:59:46,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:59:46,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:46,435 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:46,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-09-01 11:59:46,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:59:46,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:59:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:46,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 11:59:46,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-09-01 11:59:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:46,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:47,132 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 11:59:47,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-09-01 11:59:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896488975] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:47,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 11:59:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324869618] [2023-09-01 11:59:47,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 11:59:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 11:59:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 11:59:47,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 11:59:47,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 854 transitions, 45116 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:47,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:47,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 11:59:47,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:59:51,614 INFO L130 PetriNetUnfolder]: 4027/7167 cut-off events. [2023-09-01 11:59:51,614 INFO L131 PetriNetUnfolder]: For 972882/972882 co-relation queries the response was YES. [2023-09-01 11:59:51,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152654 conditions, 7167 events. 4027/7167 cut-off events. For 972882/972882 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 52916 event pairs, 1519 based on Foata normal form. 4/7171 useless extension candidates. Maximal degree in co-relation 152432. Up to 6491 conditions per place. [2023-09-01 11:59:51,764 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 712 selfloop transitions, 146 changer transitions 6/864 dead transitions. [2023-09-01 11:59:51,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 864 transitions, 47024 flow [2023-09-01 11:59:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 11:59:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 11:59:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1656 transitions. [2023-09-01 11:59:51,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37627811860940696 [2023-09-01 11:59:51,766 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1656 transitions. [2023-09-01 11:59:51,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1656 transitions. [2023-09-01 11:59:51,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:59:51,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1656 transitions. [2023-09-01 11:59:51,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,769 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:51,769 INFO L175 Difference]: Start difference. First operand has 547 places, 854 transitions, 45116 flow. Second operand 9 states and 1656 transitions. [2023-09-01 11:59:51,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 864 transitions, 47024 flow [2023-09-01 11:59:55,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 864 transitions, 46590 flow, removed 63 selfloop flow, removed 8 redundant places. [2023-09-01 11:59:56,010 INFO L231 Difference]: Finished difference. Result has 548 places, 852 transitions, 44956 flow [2023-09-01 11:59:56,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44686, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=44956, PETRI_PLACES=548, PETRI_TRANSITIONS=852} [2023-09-01 11:59:56,011 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 525 predicate places. [2023-09-01 11:59:56,011 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 852 transitions, 44956 flow [2023-09-01 11:59:56,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:56,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:59:56,012 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:59:56,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-09-01 11:59:56,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-09-01 11:59:56,212 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:59:56,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:59:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1901886359, now seen corresponding path program 69 times [2023-09-01 11:59:56,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:59:56,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746147286] [2023-09-01 11:59:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:59:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:59:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:59:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:56,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:59:56,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746147286] [2023-09-01 11:59:56,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746147286] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:59:56,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31378060] [2023-09-01 11:59:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 11:59:56,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:59:56,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:59:56,659 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:59:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-09-01 11:59:57,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 11:59:57,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:59:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 11:59:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:59:57,174 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 11:59:57,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-09-01 11:59:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:57,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:59:57,322 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 11:59:57,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 11:59:57,357 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 11:59:57,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 11:59:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 11:59:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31378060] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:59:57,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:59:57,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-09-01 11:59:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500329857] [2023-09-01 11:59:57,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:59:57,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 11:59:57,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:59:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 11:59:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-09-01 11:59:57,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 11:59:57,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 852 transitions, 44956 flow. Second operand has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:59:57,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:59:57,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 11:59:57,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:01,365 INFO L130 PetriNetUnfolder]: 4043/7191 cut-off events. [2023-09-01 12:00:01,365 INFO L131 PetriNetUnfolder]: For 974496/974496 co-relation queries the response was YES. [2023-09-01 12:00:01,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153047 conditions, 7191 events. 4043/7191 cut-off events. For 974496/974496 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 53098 event pairs, 1509 based on Foata normal form. 24/7215 useless extension candidates. Maximal degree in co-relation 152824. Up to 6435 conditions per place. [2023-09-01 12:00:01,496 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 727 selfloop transitions, 151 changer transitions 0/878 dead transitions. [2023-09-01 12:00:01,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 878 transitions, 47445 flow [2023-09-01 12:00:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:00:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:00:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1866 transitions. [2023-09-01 12:00:01,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815950920245399 [2023-09-01 12:00:01,498 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1866 transitions. [2023-09-01 12:00:01,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1866 transitions. [2023-09-01 12:00:01,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:01,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1866 transitions. [2023-09-01 12:00:01,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.6) internal successors, (1866), 10 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:01,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:01,502 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:01,502 INFO L175 Difference]: Start difference. First operand has 548 places, 852 transitions, 44956 flow. Second operand 10 states and 1866 transitions. [2023-09-01 12:00:01,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 878 transitions, 47445 flow [2023-09-01 12:00:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 878 transitions, 47151 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-09-01 12:00:05,739 INFO L231 Difference]: Finished difference. Result has 550 places, 859 transitions, 45309 flow [2023-09-01 12:00:05,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44588, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45309, PETRI_PLACES=550, PETRI_TRANSITIONS=859} [2023-09-01 12:00:05,740 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 527 predicate places. [2023-09-01 12:00:05,740 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 859 transitions, 45309 flow [2023-09-01 12:00:05,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.38888888888889) internal successors, (3301), 18 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:05,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:05,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:05,941 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:05,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 595929495, now seen corresponding path program 70 times [2023-09-01 12:00:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800187549] [2023-09-01 12:00:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:06,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:06,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800187549] [2023-09-01 12:00:06,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800187549] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:06,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700577024] [2023-09-01 12:00:06,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:00:06,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:06,389 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:06,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-09-01 12:00:06,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:00:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 12:00:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:06,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:06,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-09-01 12:00:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:06,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:07,071 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 12:00:07,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-09-01 12:00:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700577024] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:07,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:07,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:00:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482997643] [2023-09-01 12:00:07,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:00:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:00:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:00:07,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:00:07,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 859 transitions, 45309 flow. Second operand has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:07,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:07,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:00:07,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:11,639 INFO L130 PetriNetUnfolder]: 4031/7155 cut-off events. [2023-09-01 12:00:11,639 INFO L131 PetriNetUnfolder]: For 972358/972358 co-relation queries the response was YES. [2023-09-01 12:00:11,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152462 conditions, 7155 events. 4031/7155 cut-off events. For 972358/972358 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 52707 event pairs, 1518 based on Foata normal form. 4/7159 useless extension candidates. Maximal degree in co-relation 152238. Up to 6485 conditions per place. [2023-09-01 12:00:11,770 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 720 selfloop transitions, 139 changer transitions 8/867 dead transitions. [2023-09-01 12:00:11,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 867 transitions, 46996 flow [2023-09-01 12:00:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:00:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:00:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1664 transitions. [2023-09-01 12:00:11,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37809588729834126 [2023-09-01 12:00:11,772 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1664 transitions. [2023-09-01 12:00:11,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1664 transitions. [2023-09-01 12:00:11,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:11,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1664 transitions. [2023-09-01 12:00:11,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.88888888888889) internal successors, (1664), 9 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:11,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:11,775 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:11,775 INFO L175 Difference]: Start difference. First operand has 550 places, 859 transitions, 45309 flow. Second operand 9 states and 1664 transitions. [2023-09-01 12:00:11,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 867 transitions, 46996 flow [2023-09-01 12:00:16,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 867 transitions, 46540 flow, removed 87 selfloop flow, removed 6 redundant places. [2023-09-01 12:00:16,267 INFO L231 Difference]: Finished difference. Result has 553 places, 852 transitions, 44692 flow [2023-09-01 12:00:16,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44758, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=44692, PETRI_PLACES=553, PETRI_TRANSITIONS=852} [2023-09-01 12:00:16,269 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 530 predicate places. [2023-09-01 12:00:16,269 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 852 transitions, 44692 flow [2023-09-01 12:00:16,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.2) internal successors, (3644), 20 states have internal predecessors, (3644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:16,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:16,270 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:16,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:16,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:16,472 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:16,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash -287115501, now seen corresponding path program 71 times [2023-09-01 12:00:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:16,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879001776] [2023-09-01 12:00:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:16,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879001776] [2023-09-01 12:00:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879001776] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025651058] [2023-09-01 12:00:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:00:16,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:16,998 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-09-01 12:00:17,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:00:17,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:00:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:17,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:17,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 12:00:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:17,704 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:00:17,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:00:17,747 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:00:17,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:00:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:17,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025651058] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:17,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:17,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:00:17,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629625049] [2023-09-01 12:00:17,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:00:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:00:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:00:18,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:00:18,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 852 transitions, 44692 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:18,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:18,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:00:18,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:22,892 INFO L130 PetriNetUnfolder]: 4049/7195 cut-off events. [2023-09-01 12:00:22,892 INFO L131 PetriNetUnfolder]: For 965614/965614 co-relation queries the response was YES. [2023-09-01 12:00:22,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152385 conditions, 7195 events. 4049/7195 cut-off events. For 965614/965614 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 52959 event pairs, 1510 based on Foata normal form. 4/7199 useless extension candidates. Maximal degree in co-relation 152160. Up to 6405 conditions per place. [2023-09-01 12:00:23,043 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 727 selfloop transitions, 152 changer transitions 3/882 dead transitions. [2023-09-01 12:00:23,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 882 transitions, 46888 flow [2023-09-01 12:00:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:00:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:00:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2590 transitions. [2023-09-01 12:00:23,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-09-01 12:00:23,045 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2590 transitions. [2023-09-01 12:00:23,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2590 transitions. [2023-09-01 12:00:23,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:23,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2590 transitions. [2023-09-01 12:00:23,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 185.0) internal successors, (2590), 14 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,050 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:23,050 INFO L175 Difference]: Start difference. First operand has 553 places, 852 transitions, 44692 flow. Second operand 14 states and 2590 transitions. [2023-09-01 12:00:23,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 882 transitions, 46888 flow [2023-09-01 12:00:27,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 882 transitions, 46597 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-09-01 12:00:27,668 INFO L231 Difference]: Finished difference. Result has 555 places, 858 transitions, 44986 flow [2023-09-01 12:00:27,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44225, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=44986, PETRI_PLACES=555, PETRI_TRANSITIONS=858} [2023-09-01 12:00:27,669 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 532 predicate places. [2023-09-01 12:00:27,669 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 858 transitions, 44986 flow [2023-09-01 12:00:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:27,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:27,670 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:27,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:27,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-09-01 12:00:27,871 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:27,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 177218349, now seen corresponding path program 72 times [2023-09-01 12:00:27,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:27,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615667893] [2023-09-01 12:00:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615667893] [2023-09-01 12:00:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615667893] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644985058] [2023-09-01 12:00:28,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:00:28,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:28,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:28,372 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:28,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-09-01 12:00:28,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:00:28,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 12:00:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:28,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:28,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-09-01 12:00:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:28,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:29,074 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:00:29,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:00:29,110 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:00:29,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:00:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:29,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644985058] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:29,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:29,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:00:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374547854] [2023-09-01 12:00:29,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:29,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:00:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:00:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:00:29,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 12:00:29,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 858 transitions, 44986 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:29,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:29,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 12:00:29,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:33,783 INFO L130 PetriNetUnfolder]: 4029/7127 cut-off events. [2023-09-01 12:00:33,783 INFO L131 PetriNetUnfolder]: For 969821/969821 co-relation queries the response was YES. [2023-09-01 12:00:33,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151289 conditions, 7127 events. 4029/7127 cut-off events. For 969821/969821 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 52211 event pairs, 1513 based on Foata normal form. 4/7131 useless extension candidates. Maximal degree in co-relation 151064. Up to 6433 conditions per place. [2023-09-01 12:00:33,932 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 716 selfloop transitions, 144 changer transitions 2/862 dead transitions. [2023-09-01 12:00:33,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 862 transitions, 46482 flow [2023-09-01 12:00:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:00:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:00:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1657 transitions. [2023-09-01 12:00:33,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37650533969552374 [2023-09-01 12:00:33,934 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1657 transitions. [2023-09-01 12:00:33,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1657 transitions. [2023-09-01 12:00:33,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:33,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1657 transitions. [2023-09-01 12:00:33,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.11111111111111) internal successors, (1657), 9 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:33,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:33,937 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:33,937 INFO L175 Difference]: Start difference. First operand has 555 places, 858 transitions, 44986 flow. Second operand 9 states and 1657 transitions. [2023-09-01 12:00:33,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 862 transitions, 46482 flow [2023-09-01 12:00:38,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 862 transitions, 46284 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-09-01 12:00:38,471 INFO L231 Difference]: Finished difference. Result has 552 places, 854 transitions, 44800 flow [2023-09-01 12:00:38,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44524, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=44800, PETRI_PLACES=552, PETRI_TRANSITIONS=854} [2023-09-01 12:00:38,472 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 529 predicate places. [2023-09-01 12:00:38,472 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 854 transitions, 44800 flow [2023-09-01 12:00:38,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:38,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:38,473 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:38,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:38,677 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:38,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1468189613, now seen corresponding path program 73 times [2023-09-01 12:00:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:38,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111542149] [2023-09-01 12:00:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111542149] [2023-09-01 12:00:39,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111542149] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835621831] [2023-09-01 12:00:39,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:00:39,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:39,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:39,341 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:39,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-09-01 12:00:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:00:39,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:39,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:40,019 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:00:40,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:00:40,054 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:00:40,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:00:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835621831] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:40,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:00:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847014478] [2023-09-01 12:00:40,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:00:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:00:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:00:40,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 12:00:40,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 854 transitions, 44800 flow. Second operand has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:40,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:40,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 12:00:40,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:44,649 INFO L130 PetriNetUnfolder]: 4009/7059 cut-off events. [2023-09-01 12:00:44,649 INFO L131 PetriNetUnfolder]: For 961240/961240 co-relation queries the response was YES. [2023-09-01 12:00:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150275 conditions, 7059 events. 4009/7059 cut-off events. For 961240/961240 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 51396 event pairs, 1495 based on Foata normal form. 4/7063 useless extension candidates. Maximal degree in co-relation 150050. Up to 6397 conditions per place. [2023-09-01 12:00:44,801 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 724 selfloop transitions, 132 changer transitions 6/862 dead transitions. [2023-09-01 12:00:44,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 862 transitions, 46571 flow [2023-09-01 12:00:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:00:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:00:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1654 transitions. [2023-09-01 12:00:44,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37582367643717335 [2023-09-01 12:00:44,803 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1654 transitions. [2023-09-01 12:00:44,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1654 transitions. [2023-09-01 12:00:44,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:44,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1654 transitions. [2023-09-01 12:00:44,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.77777777777777) internal successors, (1654), 9 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:44,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:44,807 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:44,807 INFO L175 Difference]: Start difference. First operand has 552 places, 854 transitions, 44800 flow. Second operand 9 states and 1654 transitions. [2023-09-01 12:00:44,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 862 transitions, 46571 flow [2023-09-01 12:00:49,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 862 transitions, 46283 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 12:00:49,507 INFO L231 Difference]: Finished difference. Result has 552 places, 851 transitions, 44635 flow [2023-09-01 12:00:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44512, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=44635, PETRI_PLACES=552, PETRI_TRANSITIONS=851} [2023-09-01 12:00:49,508 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 529 predicate places. [2023-09-01 12:00:49,508 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 851 transitions, 44635 flow [2023-09-01 12:00:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.15) internal successors, (3623), 20 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:49,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:00:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:00:49,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-09-01 12:00:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:49,709 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:00:49,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:00:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash 755323215, now seen corresponding path program 74 times [2023-09-01 12:00:49,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:00:49,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902955165] [2023-09-01 12:00:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:00:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:00:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:00:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:00:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902955165] [2023-09-01 12:00:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902955165] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:00:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755865887] [2023-09-01 12:00:50,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:00:50,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:00:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:00:50,346 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:00:50,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-09-01 12:00:50,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:00:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:00:50,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:00:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:00:50,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:00:50,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 12:00:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:50,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:00:51,165 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 12:00:51,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-09-01 12:00:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:00:51,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755865887] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:00:51,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:00:51,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 22 [2023-09-01 12:00:51,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996151524] [2023-09-01 12:00:51,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:00:51,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:00:51,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:00:51,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:00:51,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:00:52,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:00:52,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 851 transitions, 44635 flow. Second operand has 22 states, 22 states have (on average 182.04545454545453) internal successors, (4005), 22 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:52,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:00:52,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:00:52,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:00:56,252 INFO L130 PetriNetUnfolder]: 4027/7101 cut-off events. [2023-09-01 12:00:56,252 INFO L131 PetriNetUnfolder]: For 946488/946488 co-relation queries the response was YES. [2023-09-01 12:00:56,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151266 conditions, 7101 events. 4027/7101 cut-off events. For 946488/946488 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 51839 event pairs, 1096 based on Foata normal form. 20/7121 useless extension candidates. Maximal degree in co-relation 151040. Up to 4833 conditions per place. [2023-09-01 12:00:56,388 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 608 selfloop transitions, 271 changer transitions 0/879 dead transitions. [2023-09-01 12:00:56,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 879 transitions, 46903 flow [2023-09-01 12:00:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:00:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:00:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1865 transitions. [2023-09-01 12:00:56,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38139059304703476 [2023-09-01 12:00:56,390 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1865 transitions. [2023-09-01 12:00:56,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1865 transitions. [2023-09-01 12:00:56,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:00:56,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1865 transitions. [2023-09-01 12:00:56,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.5) internal successors, (1865), 10 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:56,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:56,393 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:00:56,393 INFO L175 Difference]: Start difference. First operand has 552 places, 851 transitions, 44635 flow. Second operand 10 states and 1865 transitions. [2023-09-01 12:00:56,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 879 transitions, 46903 flow [2023-09-01 12:01:00,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 879 transitions, 46613 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 12:01:00,812 INFO L231 Difference]: Finished difference. Result has 551 places, 854 transitions, 45131 flow [2023-09-01 12:01:00,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44338, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45131, PETRI_PLACES=551, PETRI_TRANSITIONS=854} [2023-09-01 12:01:00,813 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 528 predicate places. [2023-09-01 12:01:00,813 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 854 transitions, 45131 flow [2023-09-01 12:01:00,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 182.04545454545453) internal successors, (4005), 22 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:00,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:00,814 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:00,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-09-01 12:01:01,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:01,015 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:01,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 674945455, now seen corresponding path program 75 times [2023-09-01 12:01:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854418847] [2023-09-01 12:01:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:01,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:01,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854418847] [2023-09-01 12:01:01,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854418847] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:01,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968887713] [2023-09-01 12:01:01,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:01:01,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:01,542 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:01,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-09-01 12:01:02,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:01:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:01:02,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:02,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:02,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 12:01:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:02,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:02,319 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:01:02,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:01:02,355 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:01:02,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:01:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:02,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968887713] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:02,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:02,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-09-01 12:01:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417537098] [2023-09-01 12:01:02,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:02,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:01:02,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:01:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:01:03,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:01:03,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 854 transitions, 45131 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:03,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:03,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:01:03,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:07,149 INFO L130 PetriNetUnfolder]: 4057/7187 cut-off events. [2023-09-01 12:01:07,149 INFO L131 PetriNetUnfolder]: For 962486/962486 co-relation queries the response was YES. [2023-09-01 12:01:07,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153511 conditions, 7187 events. 4057/7187 cut-off events. For 962486/962486 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 52853 event pairs, 1508 based on Foata normal form. 20/7207 useless extension candidates. Maximal degree in co-relation 153286. Up to 6637 conditions per place. [2023-09-01 12:01:07,293 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 786 selfloop transitions, 101 changer transitions 0/887 dead transitions. [2023-09-01 12:01:07,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 887 transitions, 47653 flow [2023-09-01 12:01:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:01:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:01:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2410 transitions. [2023-09-01 12:01:07,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791096429133239 [2023-09-01 12:01:07,295 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2410 transitions. [2023-09-01 12:01:07,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2410 transitions. [2023-09-01 12:01:07,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:07,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2410 transitions. [2023-09-01 12:01:07,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 185.3846153846154) internal successors, (2410), 13 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:07,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:07,300 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 489.0) internal successors, (6846), 14 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:07,300 INFO L175 Difference]: Start difference. First operand has 551 places, 854 transitions, 45131 flow. Second operand 13 states and 2410 transitions. [2023-09-01 12:01:07,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 887 transitions, 47653 flow [2023-09-01 12:01:12,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 887 transitions, 47198 flow, removed 68 selfloop flow, removed 6 redundant places. [2023-09-01 12:01:12,066 INFO L231 Difference]: Finished difference. Result has 561 places, 860 transitions, 45302 flow [2023-09-01 12:01:12,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44680, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=45302, PETRI_PLACES=561, PETRI_TRANSITIONS=860} [2023-09-01 12:01:12,067 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 538 predicate places. [2023-09-01 12:01:12,067 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 860 transitions, 45302 flow [2023-09-01 12:01:12,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:12,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:12,068 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:12,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-09-01 12:01:12,268 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:12,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2052741701, now seen corresponding path program 76 times [2023-09-01 12:01:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087802179] [2023-09-01 12:01:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:12,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087802179] [2023-09-01 12:01:12,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087802179] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317210894] [2023-09-01 12:01:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:01:12,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:12,732 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:12,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-09-01 12:01:13,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:01:13,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 12:01:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:13,280 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:01:13,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-09-01 12:01:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:13,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:13,658 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:01:13,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:01:13,693 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:01:13,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:01:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317210894] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:13,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:13,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 24 [2023-09-01 12:01:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454754340] [2023-09-01 12:01:13,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 12:01:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 12:01:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-09-01 12:01:14,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 489 [2023-09-01 12:01:14,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 860 transitions, 45302 flow. Second operand has 24 states, 24 states have (on average 180.08333333333334) internal successors, (4322), 24 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:14,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:14,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 489 [2023-09-01 12:01:14,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:20,625 INFO L130 PetriNetUnfolder]: 4639/8165 cut-off events. [2023-09-01 12:01:20,626 INFO L131 PetriNetUnfolder]: For 1268276/1268276 co-relation queries the response was YES. [2023-09-01 12:01:20,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173787 conditions, 8165 events. 4639/8165 cut-off events. For 1268276/1268276 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 60989 event pairs, 584 based on Foata normal form. 52/8217 useless extension candidates. Maximal degree in co-relation 173558. Up to 5118 conditions per place. [2023-09-01 12:01:20,930 INFO L137 encePairwiseOnDemand]: 478/489 looper letters, 334 selfloop transitions, 659 changer transitions 1/994 dead transitions. [2023-09-01 12:01:20,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 994 transitions, 53227 flow [2023-09-01 12:01:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:01:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:01:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4205 transitions. [2023-09-01 12:01:20,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738774784386948 [2023-09-01 12:01:20,933 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4205 transitions. [2023-09-01 12:01:20,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4205 transitions. [2023-09-01 12:01:20,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:20,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4205 transitions. [2023-09-01 12:01:20,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:20,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 489.0) internal successors, (11736), 24 states have internal predecessors, (11736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:20,942 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 489.0) internal successors, (11736), 24 states have internal predecessors, (11736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:20,942 INFO L175 Difference]: Start difference. First operand has 561 places, 860 transitions, 45302 flow. Second operand 23 states and 4205 transitions. [2023-09-01 12:01:20,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 994 transitions, 53227 flow [2023-09-01 12:01:26,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 994 transitions, 52786 flow, removed 131 selfloop flow, removed 6 redundant places. [2023-09-01 12:01:26,687 INFO L231 Difference]: Finished difference. Result has 584 places, 944 transitions, 52210 flow [2023-09-01 12:01:26,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=44787, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=52210, PETRI_PLACES=584, PETRI_TRANSITIONS=944} [2023-09-01 12:01:26,688 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 561 predicate places. [2023-09-01 12:01:26,689 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 944 transitions, 52210 flow [2023-09-01 12:01:26,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 180.08333333333334) internal successors, (4322), 24 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:26,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:26,689 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:26,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:26,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:26,890 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:26,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash 243108279, now seen corresponding path program 77 times [2023-09-01 12:01:26,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664352023] [2023-09-01 12:01:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664352023] [2023-09-01 12:01:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664352023] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568848150] [2023-09-01 12:01:27,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:01:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:27,525 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:27,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-09-01 12:01:27,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:01:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:01:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:28,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:28,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-09-01 12:01:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:28,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:28,261 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 12:01:28,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-09-01 12:01:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:28,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568848150] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:28,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:28,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:01:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400055034] [2023-09-01 12:01:28,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:01:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:01:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:01:28,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 12:01:28,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 944 transitions, 52210 flow. Second operand has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:28,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:28,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 12:01:28,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:33,457 INFO L130 PetriNetUnfolder]: 4639/8177 cut-off events. [2023-09-01 12:01:33,457 INFO L131 PetriNetUnfolder]: For 1310720/1310720 co-relation queries the response was YES. [2023-09-01 12:01:33,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178725 conditions, 8177 events. 4639/8177 cut-off events. For 1310720/1310720 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 61257 event pairs, 1264 based on Foata normal form. 4/8181 useless extension candidates. Maximal degree in co-relation 178488. Up to 5753 conditions per place. [2023-09-01 12:01:33,622 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 674 selfloop transitions, 284 changer transitions 9/967 dead transitions. [2023-09-01 12:01:33,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 967 transitions, 54667 flow [2023-09-01 12:01:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:01:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:01:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1662 transitions. [2023-09-01 12:01:33,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776414451261077 [2023-09-01 12:01:33,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1662 transitions. [2023-09-01 12:01:33,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1662 transitions. [2023-09-01 12:01:33,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:33,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1662 transitions. [2023-09-01 12:01:33,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:33,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:33,627 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:33,627 INFO L175 Difference]: Start difference. First operand has 584 places, 944 transitions, 52210 flow. Second operand 9 states and 1662 transitions. [2023-09-01 12:01:33,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 967 transitions, 54667 flow [2023-09-01 12:01:40,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 967 transitions, 53817 flow, removed 351 selfloop flow, removed 9 redundant places. [2023-09-01 12:01:40,156 INFO L231 Difference]: Finished difference. Result has 584 places, 943 transitions, 51994 flow [2023-09-01 12:01:40,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=51360, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=51994, PETRI_PLACES=584, PETRI_TRANSITIONS=943} [2023-09-01 12:01:40,157 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 561 predicate places. [2023-09-01 12:01:40,157 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 943 transitions, 51994 flow [2023-09-01 12:01:40,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:40,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:40,158 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:40,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:40,359 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:40,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2102567933, now seen corresponding path program 78 times [2023-09-01 12:01:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708668045] [2023-09-01 12:01:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708668045] [2023-09-01 12:01:40,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708668045] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433935049] [2023-09-01 12:01:40,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:01:40,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:40,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:40,907 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:40,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-09-01 12:01:41,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:01:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:01:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 12:01:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:41,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:01:41,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-09-01 12:01:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:41,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:41,847 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 12:01:41,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-09-01 12:01:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:41,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433935049] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:41,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:41,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 12:01:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273857932] [2023-09-01 12:01:41,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:01:41,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:01:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:01:43,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 12:01:43,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 943 transitions, 51994 flow. Second operand has 22 states, 22 states have (on average 179.1818181818182) internal successors, (3942), 22 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:43,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:43,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 12:01:43,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:01:48,455 INFO L130 PetriNetUnfolder]: 4651/8187 cut-off events. [2023-09-01 12:01:48,455 INFO L131 PetriNetUnfolder]: For 1302788/1302788 co-relation queries the response was YES. [2023-09-01 12:01:48,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177447 conditions, 8187 events. 4651/8187 cut-off events. For 1302788/1302788 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 61308 event pairs, 454 based on Foata normal form. 4/8191 useless extension candidates. Maximal degree in co-relation 177210. Up to 4590 conditions per place. [2023-09-01 12:01:48,613 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 326 selfloop transitions, 658 changer transitions 2/986 dead transitions. [2023-09-01 12:01:48,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 986 transitions, 54501 flow [2023-09-01 12:01:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:01:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:01:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2918 transitions. [2023-09-01 12:01:48,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37295501022494887 [2023-09-01 12:01:48,615 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2918 transitions. [2023-09-01 12:01:48,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2918 transitions. [2023-09-01 12:01:48,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:01:48,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2918 transitions. [2023-09-01 12:01:48,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 182.375) internal successors, (2918), 16 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:48,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:48,621 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 489.0) internal successors, (8313), 17 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:48,621 INFO L175 Difference]: Start difference. First operand has 584 places, 943 transitions, 51994 flow. Second operand 16 states and 2918 transitions. [2023-09-01 12:01:48,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 986 transitions, 54501 flow [2023-09-01 12:01:54,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 986 transitions, 53943 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-09-01 12:01:54,494 INFO L231 Difference]: Finished difference. Result has 592 places, 948 transitions, 53774 flow [2023-09-01 12:01:54,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=51251, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=53774, PETRI_PLACES=592, PETRI_TRANSITIONS=948} [2023-09-01 12:01:54,495 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 569 predicate places. [2023-09-01 12:01:54,496 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 948 transitions, 53774 flow [2023-09-01 12:01:54,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 179.1818181818182) internal successors, (3942), 22 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:54,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:01:54,496 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:01:54,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-09-01 12:01:54,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-09-01 12:01:54,697 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:01:54,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:01:54,697 INFO L85 PathProgramCache]: Analyzing trace with hash -398757043, now seen corresponding path program 79 times [2023-09-01 12:01:54,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:01:54,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703108739] [2023-09-01 12:01:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:01:54,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:01:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:01:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703108739] [2023-09-01 12:01:55,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703108739] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:01:55,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274341260] [2023-09-01 12:01:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:01:55,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:01:55,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:01:55,161 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:01:55,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-09-01 12:01:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:01:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:01:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:01:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:55,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:01:55,799 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:01:55,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:01:55,834 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:01:55,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:01:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:01:55,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274341260] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:01:55,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:01:55,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:01:55,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888730067] [2023-09-01 12:01:55,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:01:55,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:01:55,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:01:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:01:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:01:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:01:56,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 948 transitions, 53774 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:01:56,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:01:56,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:01:56,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:01,113 INFO L130 PetriNetUnfolder]: 4643/8171 cut-off events. [2023-09-01 12:02:01,113 INFO L131 PetriNetUnfolder]: For 1337669/1337669 co-relation queries the response was YES. [2023-09-01 12:02:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181194 conditions, 8171 events. 4643/8171 cut-off events. For 1337669/1337669 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 61012 event pairs, 1715 based on Foata normal form. 4/8175 useless extension candidates. Maximal degree in co-relation 180956. Up to 7697 conditions per place. [2023-09-01 12:02:01,504 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 866 selfloop transitions, 87 changer transitions 6/959 dead transitions. [2023-09-01 12:02:01,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 959 transitions, 55750 flow [2023-09-01 12:02:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:02:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:02:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1662 transitions. [2023-09-01 12:02:01,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776414451261077 [2023-09-01 12:02:01,506 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1662 transitions. [2023-09-01 12:02:01,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1662 transitions. [2023-09-01 12:02:01,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:01,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1662 transitions. [2023-09-01 12:02:01,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.66666666666666) internal successors, (1662), 9 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:01,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:01,511 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:01,511 INFO L175 Difference]: Start difference. First operand has 592 places, 948 transitions, 53774 flow. Second operand 9 states and 1662 transitions. [2023-09-01 12:02:01,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 959 transitions, 55750 flow [2023-09-01 12:02:07,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 959 transitions, 55268 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-09-01 12:02:07,347 INFO L231 Difference]: Finished difference. Result has 590 places, 945 transitions, 53323 flow [2023-09-01 12:02:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=53293, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=53323, PETRI_PLACES=590, PETRI_TRANSITIONS=945} [2023-09-01 12:02:07,348 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 567 predicate places. [2023-09-01 12:02:07,348 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 945 transitions, 53323 flow [2023-09-01 12:02:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:07,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:07,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:07,549 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:07,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1332246459, now seen corresponding path program 80 times [2023-09-01 12:02:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:07,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764138635] [2023-09-01 12:02:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:08,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764138635] [2023-09-01 12:02:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764138635] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493948622] [2023-09-01 12:02:08,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:02:08,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:08,112 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-09-01 12:02:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:02:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:02:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:08,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:08,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-09-01 12:02:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:08,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:08,873 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 12:02:08,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-09-01 12:02:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:08,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493948622] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:08,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:08,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-09-01 12:02:08,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756311725] [2023-09-01 12:02:08,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:02:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:02:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:02:09,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:02:09,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 945 transitions, 53323 flow. Second operand has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:09,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:09,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:02:09,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:14,463 INFO L130 PetriNetUnfolder]: 4661/8213 cut-off events. [2023-09-01 12:02:14,463 INFO L131 PetriNetUnfolder]: For 1345695/1345695 co-relation queries the response was YES. [2023-09-01 12:02:14,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181891 conditions, 8213 events. 4661/8213 cut-off events. For 1345695/1345695 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 61362 event pairs, 1703 based on Foata normal form. 20/8233 useless extension candidates. Maximal degree in co-relation 181652. Up to 7657 conditions per place. [2023-09-01 12:02:14,630 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 861 selfloop transitions, 106 changer transitions 0/967 dead transitions. [2023-09-01 12:02:14,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 967 transitions, 55782 flow [2023-09-01 12:02:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:02:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:02:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1857 transitions. [2023-09-01 12:02:14,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37975460122699384 [2023-09-01 12:02:14,632 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1857 transitions. [2023-09-01 12:02:14,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1857 transitions. [2023-09-01 12:02:14,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:14,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1857 transitions. [2023-09-01 12:02:14,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.7) internal successors, (1857), 10 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:14,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:14,636 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 489.0) internal successors, (5379), 11 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:14,636 INFO L175 Difference]: Start difference. First operand has 590 places, 945 transitions, 53323 flow. Second operand 10 states and 1857 transitions. [2023-09-01 12:02:14,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 967 transitions, 55782 flow [2023-09-01 12:02:20,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 967 transitions, 55597 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 12:02:20,314 INFO L231 Difference]: Finished difference. Result has 589 places, 948 transitions, 53630 flow [2023-09-01 12:02:20,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=53130, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=53630, PETRI_PLACES=589, PETRI_TRANSITIONS=948} [2023-09-01 12:02:20,315 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 566 predicate places. [2023-09-01 12:02:20,315 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 948 transitions, 53630 flow [2023-09-01 12:02:20,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.15) internal successors, (3643), 20 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:20,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:20,316 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:20,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:20,516 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:20,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1573481587, now seen corresponding path program 81 times [2023-09-01 12:02:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:20,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728836631] [2023-09-01 12:02:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:20,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:21,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728836631] [2023-09-01 12:02:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728836631] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254421544] [2023-09-01 12:02:21,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:02:21,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:21,018 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:21,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-09-01 12:02:21,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:02:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 12:02:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:02:21,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:02:21,673 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:02:21,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 23 [2023-09-01 12:02:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:21,826 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6063 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6063))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-09-01 12:02:21,874 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-09-01 12:02:21,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-09-01 12:02:21,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:21,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-09-01 12:02:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254421544] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:22,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:22,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-09-01 12:02:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139197839] [2023-09-01 12:02:22,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:22,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 12:02:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 12:02:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=604, Unknown=1, NotChecked=50, Total=756 [2023-09-01 12:02:22,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-09-01 12:02:22,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 948 transitions, 53630 flow. Second operand has 28 states, 28 states have (on average 160.96428571428572) internal successors, (4507), 28 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:22,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:22,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-09-01 12:02:22,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:27,838 INFO L130 PetriNetUnfolder]: 4905/8627 cut-off events. [2023-09-01 12:02:27,839 INFO L131 PetriNetUnfolder]: For 1372372/1372372 co-relation queries the response was YES. [2023-09-01 12:02:27,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190681 conditions, 8627 events. 4905/8627 cut-off events. For 1372372/1372372 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 64797 event pairs, 345 based on Foata normal form. 28/8655 useless extension candidates. Maximal degree in co-relation 190442. Up to 3424 conditions per place. [2023-09-01 12:02:28,035 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 607 selfloop transitions, 434 changer transitions 1/1042 dead transitions. [2023-09-01 12:02:28,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1042 transitions, 59324 flow [2023-09-01 12:02:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:02:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:02:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2310 transitions. [2023-09-01 12:02:28,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374233128834356 [2023-09-01 12:02:28,038 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2310 transitions. [2023-09-01 12:02:28,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2310 transitions. [2023-09-01 12:02:28,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:28,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2310 transitions. [2023-09-01 12:02:28,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:28,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:28,043 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:28,043 INFO L175 Difference]: Start difference. First operand has 589 places, 948 transitions, 53630 flow. Second operand 14 states and 2310 transitions. [2023-09-01 12:02:28,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1042 transitions, 59324 flow [2023-09-01 12:02:35,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1042 transitions, 58966 flow, removed 72 selfloop flow, removed 7 redundant places. [2023-09-01 12:02:35,122 INFO L231 Difference]: Finished difference. Result has 595 places, 957 transitions, 54752 flow [2023-09-01 12:02:35,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=52975, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=54752, PETRI_PLACES=595, PETRI_TRANSITIONS=957} [2023-09-01 12:02:35,123 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 572 predicate places. [2023-09-01 12:02:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 957 transitions, 54752 flow [2023-09-01 12:02:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.96428571428572) internal successors, (4507), 28 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:35,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:35,124 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:35,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2023-09-01 12:02:35,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-09-01 12:02:35,325 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:35,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -931089555, now seen corresponding path program 82 times [2023-09-01 12:02:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331086694] [2023-09-01 12:02:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:35,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331086694] [2023-09-01 12:02:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331086694] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914645536] [2023-09-01 12:02:35,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:02:35,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:35,976 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-09-01 12:02:36,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:02:36,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:36,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 12:02:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:02:36,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 12:02:36,655 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:02:36,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-09-01 12:02:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:36,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:36,840 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6134 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6134))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (not (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-09-01 12:02:36,887 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-09-01 12:02:36,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-09-01 12:02:36,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:36,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-09-01 12:02:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914645536] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:37,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-09-01 12:02:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803694442] [2023-09-01 12:02:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:37,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 12:02:37,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:37,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 12:02:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=601, Unknown=1, NotChecked=50, Total=756 [2023-09-01 12:02:37,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 489 [2023-09-01 12:02:37,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 957 transitions, 54752 flow. Second operand has 28 states, 28 states have (on average 160.96428571428572) internal successors, (4507), 28 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:37,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:37,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 489 [2023-09-01 12:02:37,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:42,701 INFO L130 PetriNetUnfolder]: 5063/8897 cut-off events. [2023-09-01 12:02:42,701 INFO L131 PetriNetUnfolder]: For 1516204/1516204 co-relation queries the response was YES. [2023-09-01 12:02:42,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198247 conditions, 8897 events. 5063/8897 cut-off events. For 1516204/1516204 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 67187 event pairs, 836 based on Foata normal form. 52/8949 useless extension candidates. Maximal degree in co-relation 198002. Up to 4339 conditions per place. [2023-09-01 12:02:42,919 INFO L137 encePairwiseOnDemand]: 479/489 looper letters, 643 selfloop transitions, 385 changer transitions 0/1028 dead transitions. [2023-09-01 12:02:42,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1028 transitions, 59497 flow [2023-09-01 12:02:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:02:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:02:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2471 transitions. [2023-09-01 12:02:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368779822767553 [2023-09-01 12:02:42,921 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2471 transitions. [2023-09-01 12:02:42,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2471 transitions. [2023-09-01 12:02:42,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:42,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2471 transitions. [2023-09-01 12:02:42,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.73333333333332) internal successors, (2471), 15 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:42,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:42,927 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 489.0) internal successors, (7824), 16 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:42,927 INFO L175 Difference]: Start difference. First operand has 595 places, 957 transitions, 54752 flow. Second operand 15 states and 2471 transitions. [2023-09-01 12:02:42,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1028 transitions, 59497 flow [2023-09-01 12:02:50,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1028 transitions, 58951 flow, removed 134 selfloop flow, removed 12 redundant places. [2023-09-01 12:02:50,711 INFO L231 Difference]: Finished difference. Result has 600 places, 978 transitions, 56379 flow [2023-09-01 12:02:50,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=54230, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=56379, PETRI_PLACES=600, PETRI_TRANSITIONS=978} [2023-09-01 12:02:50,713 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 577 predicate places. [2023-09-01 12:02:50,713 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 978 transitions, 56379 flow [2023-09-01 12:02:50,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 160.96428571428572) internal successors, (4507), 28 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:50,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:02:50,714 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:02:50,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-09-01 12:02:50,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:50,921 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:02:50,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:02:50,922 INFO L85 PathProgramCache]: Analyzing trace with hash -995829491, now seen corresponding path program 83 times [2023-09-01 12:02:50,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:02:50,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644434915] [2023-09-01 12:02:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:02:50,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:02:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:02:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:51,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:02:51,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644434915] [2023-09-01 12:02:51,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644434915] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:02:51,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342462838] [2023-09-01 12:02:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:02:51,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:02:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:02:51,493 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:02:51,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-09-01 12:02:51,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:02:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:02:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:02:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:02:52,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:02:52,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-09-01 12:02:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:52,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:02:52,337 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 12:02:52,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-09-01 12:02:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:02:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342462838] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:02:52,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:02:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-09-01 12:02:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040530353] [2023-09-01 12:02:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:02:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:02:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:02:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:02:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:02:53,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 12:02:53,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 978 transitions, 56379 flow. Second operand has 21 states, 21 states have (on average 181.04761904761904) internal successors, (3802), 21 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:53,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:02:53,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 12:02:53,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:02:58,543 INFO L130 PetriNetUnfolder]: 5061/8899 cut-off events. [2023-09-01 12:02:58,543 INFO L131 PetriNetUnfolder]: For 1542151/1542151 co-relation queries the response was YES. [2023-09-01 12:02:58,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199902 conditions, 8899 events. 5061/8899 cut-off events. For 1542151/1542151 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 67442 event pairs, 1302 based on Foata normal form. 4/8903 useless extension candidates. Maximal degree in co-relation 199654. Up to 6205 conditions per place. [2023-09-01 12:02:58,737 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 673 selfloop transitions, 319 changer transitions 11/1003 dead transitions. [2023-09-01 12:02:58,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1003 transitions, 59014 flow [2023-09-01 12:02:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:02:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:02:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1663 transitions. [2023-09-01 12:02:58,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778686662122245 [2023-09-01 12:02:58,739 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1663 transitions. [2023-09-01 12:02:58,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1663 transitions. [2023-09-01 12:02:58,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:02:58,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1663 transitions. [2023-09-01 12:02:58,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.77777777777777) internal successors, (1663), 9 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:58,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:58,742 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:02:58,742 INFO L175 Difference]: Start difference. First operand has 600 places, 978 transitions, 56379 flow. Second operand 9 states and 1663 transitions. [2023-09-01 12:02:58,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1003 transitions, 59014 flow [2023-09-01 12:03:07,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1003 transitions, 58118 flow, removed 191 selfloop flow, removed 12 redundant places. [2023-09-01 12:03:07,483 INFO L231 Difference]: Finished difference. Result has 597 places, 970 transitions, 55645 flow [2023-09-01 12:03:07,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=55483, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=55645, PETRI_PLACES=597, PETRI_TRANSITIONS=970} [2023-09-01 12:03:07,484 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 574 predicate places. [2023-09-01 12:03:07,484 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 970 transitions, 55645 flow [2023-09-01 12:03:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 181.04761904761904) internal successors, (3802), 21 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:07,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:07,485 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:07,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:07,694 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:03:07,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash -34149157, now seen corresponding path program 84 times [2023-09-01 12:03:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:07,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507715265] [2023-09-01 12:03:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:08,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507715265] [2023-09-01 12:03:08,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507715265] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257345600] [2023-09-01 12:03:08,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:03:08,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:08,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:08,196 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:08,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-09-01 12:03:08,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:03:08,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 12:03:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:08,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:08,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-09-01 12:03:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:08,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:09,080 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:03:09,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:03:09,117 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:03:09,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:03:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:09,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257345600] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:09,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:09,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 12:03:09,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508437559] [2023-09-01 12:03:09,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:09,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:03:09,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:03:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:03:10,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-09-01 12:03:10,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 970 transitions, 55645 flow. Second operand has 22 states, 22 states have (on average 179.1818181818182) internal successors, (3942), 22 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:10,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:10,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-09-01 12:03:10,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:15,748 INFO L130 PetriNetUnfolder]: 5099/8967 cut-off events. [2023-09-01 12:03:15,748 INFO L131 PetriNetUnfolder]: For 1540724/1540724 co-relation queries the response was YES. [2023-09-01 12:03:15,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201213 conditions, 8967 events. 5099/8967 cut-off events. For 1540724/1540724 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 67883 event pairs, 830 based on Foata normal form. 12/8979 useless extension candidates. Maximal degree in co-relation 200968. Up to 6564 conditions per place. [2023-09-01 12:03:15,948 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 458 selfloop transitions, 568 changer transitions 2/1028 dead transitions. [2023-09-01 12:03:15,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1028 transitions, 58858 flow [2023-09-01 12:03:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:03:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:03:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3820 transitions. [2023-09-01 12:03:15,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37199337812834743 [2023-09-01 12:03:15,951 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3820 transitions. [2023-09-01 12:03:15,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3820 transitions. [2023-09-01 12:03:15,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:15,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3820 transitions. [2023-09-01 12:03:15,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.9047619047619) internal successors, (3820), 21 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:15,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:15,958 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 489.0) internal successors, (10758), 22 states have internal predecessors, (10758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:15,959 INFO L175 Difference]: Start difference. First operand has 597 places, 970 transitions, 55645 flow. Second operand 21 states and 3820 transitions. [2023-09-01 12:03:15,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1028 transitions, 58858 flow [2023-09-01 12:03:23,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1028 transitions, 58197 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-09-01 12:03:23,777 INFO L231 Difference]: Finished difference. Result has 607 places, 981 transitions, 57520 flow [2023-09-01 12:03:23,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=54721, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=57520, PETRI_PLACES=607, PETRI_TRANSITIONS=981} [2023-09-01 12:03:23,778 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 584 predicate places. [2023-09-01 12:03:23,778 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 981 transitions, 57520 flow [2023-09-01 12:03:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 179.1818181818182) internal successors, (3942), 22 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:23,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:23,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:23,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:23,980 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:03:23,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1525644689, now seen corresponding path program 85 times [2023-09-01 12:03:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:23,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124075088] [2023-09-01 12:03:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124075088] [2023-09-01 12:03:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124075088] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:24,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782859726] [2023-09-01 12:03:24,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:03:24,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:24,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:24,528 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:24,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-09-01 12:03:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:03:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:25,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:25,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2023-09-01 12:03:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:25,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:25,250 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-09-01 12:03:25,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2023-09-01 12:03:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:25,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782859726] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:25,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:25,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:03:25,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396144038] [2023-09-01 12:03:25,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:25,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:03:25,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:03:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:03:26,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 489 [2023-09-01 12:03:26,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 981 transitions, 57520 flow. Second operand has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:26,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:26,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 489 [2023-09-01 12:03:26,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:31,271 INFO L130 PetriNetUnfolder]: 5107/8963 cut-off events. [2023-09-01 12:03:31,271 INFO L131 PetriNetUnfolder]: For 1545994/1545994 co-relation queries the response was YES. [2023-09-01 12:03:31,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203802 conditions, 8963 events. 5107/8963 cut-off events. For 1545994/1545994 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 67593 event pairs, 1868 based on Foata normal form. 4/8967 useless extension candidates. Maximal degree in co-relation 203556. Up to 8329 conditions per place. [2023-09-01 12:03:31,463 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 887 selfloop transitions, 120 changer transitions 2/1009 dead transitions. [2023-09-01 12:03:31,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1009 transitions, 59964 flow [2023-09-01 12:03:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:03:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:03:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2586 transitions. [2023-09-01 12:03:31,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37773882559158634 [2023-09-01 12:03:31,465 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2586 transitions. [2023-09-01 12:03:31,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2586 transitions. [2023-09-01 12:03:31,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:31,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2586 transitions. [2023-09-01 12:03:31,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 184.71428571428572) internal successors, (2586), 14 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:31,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:31,470 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 489.0) internal successors, (7335), 15 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:31,470 INFO L175 Difference]: Start difference. First operand has 607 places, 981 transitions, 57520 flow. Second operand 14 states and 2586 transitions. [2023-09-01 12:03:31,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1009 transitions, 59964 flow [2023-09-01 12:03:39,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1009 transitions, 59370 flow, removed 212 selfloop flow, removed 7 redundant places. [2023-09-01 12:03:39,917 INFO L231 Difference]: Finished difference. Result has 610 places, 986 transitions, 57478 flow [2023-09-01 12:03:39,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=56731, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=57478, PETRI_PLACES=610, PETRI_TRANSITIONS=986} [2023-09-01 12:03:39,919 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 587 predicate places. [2023-09-01 12:03:39,919 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 986 transitions, 57478 flow [2023-09-01 12:03:39,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 182.1) internal successors, (3642), 20 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:39,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:39,919 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:39,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-09-01 12:03:40,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2023-09-01 12:03:40,120 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:03:40,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2112021603, now seen corresponding path program 86 times [2023-09-01 12:03:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761958464] [2023-09-01 12:03:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:40,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761958464] [2023-09-01 12:03:40,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761958464] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47011082] [2023-09-01 12:03:40,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:03:40,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:40,634 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:40,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-09-01 12:03:41,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:03:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 12:03:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:41,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:41,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-09-01 12:03:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:41,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:41,285 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-09-01 12:03:41,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-09-01 12:03:41,320 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-09-01 12:03:41,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-09-01 12:03:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47011082] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:41,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:41,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:03:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172350691] [2023-09-01 12:03:41,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:41,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:03:41,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:03:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:03:41,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 489 [2023-09-01 12:03:41,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 986 transitions, 57478 flow. Second operand has 20 states, 20 states have (on average 183.1) internal successors, (3662), 20 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:41,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:41,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 489 [2023-09-01 12:03:41,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:03:46,981 INFO L130 PetriNetUnfolder]: 5087/8895 cut-off events. [2023-09-01 12:03:46,982 INFO L131 PetriNetUnfolder]: For 1525674/1525674 co-relation queries the response was YES. [2023-09-01 12:03:47,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201786 conditions, 8895 events. 5087/8895 cut-off events. For 1525674/1525674 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 66751 event pairs, 1866 based on Foata normal form. 4/8899 useless extension candidates. Maximal degree in co-relation 201540. Up to 8325 conditions per place. [2023-09-01 12:03:47,180 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 890 selfloop transitions, 101 changer transitions 2/993 dead transitions. [2023-09-01 12:03:47,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 993 transitions, 59219 flow [2023-09-01 12:03:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:03:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:03:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1674 transitions. [2023-09-01 12:03:47,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3803680981595092 [2023-09-01 12:03:47,182 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1674 transitions. [2023-09-01 12:03:47,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1674 transitions. [2023-09-01 12:03:47,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:03:47,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1674 transitions. [2023-09-01 12:03:47,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:47,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:47,185 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:47,185 INFO L175 Difference]: Start difference. First operand has 610 places, 986 transitions, 57478 flow. Second operand 9 states and 1674 transitions. [2023-09-01 12:03:47,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 993 transitions, 59219 flow [2023-09-01 12:03:55,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 993 transitions, 59037 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-09-01 12:03:55,335 INFO L231 Difference]: Finished difference. Result has 605 places, 982 transitions, 57192 flow [2023-09-01 12:03:55,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=489, PETRI_DIFFERENCE_MINUEND_FLOW=57002, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=57192, PETRI_PLACES=605, PETRI_TRANSITIONS=982} [2023-09-01 12:03:55,337 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 582 predicate places. [2023-09-01 12:03:55,337 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 982 transitions, 57192 flow [2023-09-01 12:03:55,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 183.1) internal successors, (3662), 20 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:55,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:03:55,338 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:03:55,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-09-01 12:03:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:55,545 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:03:55,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:03:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1827791477, now seen corresponding path program 87 times [2023-09-01 12:03:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:03:55,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599601709] [2023-09-01 12:03:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:03:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:03:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:03:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:56,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:03:56,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599601709] [2023-09-01 12:03:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599601709] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:03:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194302434] [2023-09-01 12:03:56,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:03:56,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:03:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:03:56,152 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:03:56,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-09-01 12:03:56,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:03:56,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:03:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:03:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:03:56,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:03:56,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-09-01 12:03:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:03:56,938 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-09-01 12:03:56,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2023-09-01 12:03:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-09-01 12:03:56,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194302434] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:03:56,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:03:56,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-09-01 12:03:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343720104] [2023-09-01 12:03:56,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:03:56,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:03:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:03:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:03:56,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:03:58,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 489 [2023-09-01 12:03:58,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 982 transitions, 57192 flow. Second operand has 20 states, 20 states have (on average 181.1) internal successors, (3622), 20 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:03:58,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:03:58,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 489 [2023-09-01 12:03:58,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:04:03,770 INFO L130 PetriNetUnfolder]: 5073/8853 cut-off events. [2023-09-01 12:04:03,771 INFO L131 PetriNetUnfolder]: For 1519994/1519994 co-relation queries the response was YES. [2023-09-01 12:04:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201064 conditions, 8853 events. 5073/8853 cut-off events. For 1519994/1519994 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 66285 event pairs, 1370 based on Foata normal form. 4/8857 useless extension candidates. Maximal degree in co-relation 200818. Up to 6241 conditions per place. [2023-09-01 12:04:03,971 INFO L137 encePairwiseOnDemand]: 482/489 looper letters, 671 selfloop transitions, 320 changer transitions 6/997 dead transitions. [2023-09-01 12:04:03,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 997 transitions, 59164 flow [2023-09-01 12:04:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:04:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:04:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1661 transitions. [2023-09-01 12:04:03,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774142240399909 [2023-09-01 12:04:03,973 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1661 transitions. [2023-09-01 12:04:03,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1661 transitions. [2023-09-01 12:04:03,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:04:03,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1661 transitions. [2023-09-01 12:04:03,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 184.55555555555554) internal successors, (1661), 9 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:03,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:03,976 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 489.0) internal successors, (4890), 10 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:04:03,976 INFO L175 Difference]: Start difference. First operand has 605 places, 982 transitions, 57192 flow. Second operand 9 states and 1661 transitions. [2023-09-01 12:04:03,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 997 transitions, 59164 flow Killed by 15