./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-1.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/parallel-misc-1.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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --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 12:42:49,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:42:49,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:42:49,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:42:49,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:42:49,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:42:49,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:42:49,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:42:49,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:42:49,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:42:49,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:42:49,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:42:49,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:42:49,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:42:49,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:42:50,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:42:50,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:42:50,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:42:50,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:42:50,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:42:50,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:42:50,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:42:50,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:42:50,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:42:50,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:42:50,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:42:50,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:42:50,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:42:50,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:42:50,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:42:50,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:42:50,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:42:50,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:42:50,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:42:50,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:42:50,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:42:50,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:42:50,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:42:50,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:42:50,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:42:50,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:42:50,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:42:50,075 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:42:50,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:42:50,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:42:50,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:42:50,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:42:50,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:42:50,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:42:50,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:42:50,078 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:42:50,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:42:50,079 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:42:50,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:42:50,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:42:50,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:42:50,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:42:50,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:42:50,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:42:50,080 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:42:50,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:42:50,081 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:42:50,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:42:50,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:42:50,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:42:50,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:42:50,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:42:50,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:42:50,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:42:50,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:42:50,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:42:50,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:42:50,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:42:50,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:42:50,083 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:42:50,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:42:50,083 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:42:50,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:42:50,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:42:50,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:42:50,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:42:50,387 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:42:50,388 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:42:50,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-09-01 12:42:51,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:42:51,720 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:42:51,720 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-09-01 12:42:51,727 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7bbf492/cd752296096046869bef9becf5e61717/FLAG568301b06 [2023-09-01 12:42:51,739 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7bbf492/cd752296096046869bef9becf5e61717 [2023-09-01 12:42:51,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:42:51,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:42:51,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:42:51,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:42:51,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:42:51,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a18704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51, skipping insertion in model container [2023-09-01 12:42:51,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:42:51,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:42:51,892 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/parallel-misc-1.wvr.c[2755,2768] [2023-09-01 12:42:51,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:42:51,908 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:42:51,926 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/parallel-misc-1.wvr.c[2755,2768] [2023-09-01 12:42:51,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:42:51,941 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:42:51,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51 WrapperNode [2023-09-01 12:42:51,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:42:51,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:42:51,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:42:51,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:42:51,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,983 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 287 [2023-09-01 12:42:51,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:42:51,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:42:51,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:42:51,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:42:51,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:51,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:52,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:52,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:52,008 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:52,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:52,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:42:52,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:42:52,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:42:52,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:42:52,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (1/1) ... [2023-09-01 12:42:52,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:42:52,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:42:52,056 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 12:42:52,082 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 12:42:52,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:42:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:42:52,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:42:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:42:52,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:42:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:42:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:42:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:42:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:42:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:42:52,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:42:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:42:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:42:52,102 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 12:42:52,285 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:42:52,287 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:42:52,688 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:42:52,698 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:42:52,698 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 12:42:52,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:42:52 BoogieIcfgContainer [2023-09-01 12:42:52,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:42:52,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:42:52,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:42:52,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:42:52,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:42:51" (1/3) ... [2023-09-01 12:42:52,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335e356c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:42:52, skipping insertion in model container [2023-09-01 12:42:52,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:42:51" (2/3) ... [2023-09-01 12:42:52,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335e356c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:42:52, skipping insertion in model container [2023-09-01 12:42:52,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:42:52" (3/3) ... [2023-09-01 12:42:52,707 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-09-01 12:42:52,714 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:42:52,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:42:52,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:42:52,722 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:42:52,825 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:42:52,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 346 transitions, 708 flow [2023-09-01 12:42:53,039 INFO L130 PetriNetUnfolder]: 28/344 cut-off events. [2023-09-01 12:42:53,039 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:42:53,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 344 events. 28/344 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 768 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-09-01 12:42:53,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 346 transitions, 708 flow [2023-09-01 12:42:53,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 336 transitions, 684 flow [2023-09-01 12:42:53,070 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:42:53,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 336 transitions, 684 flow [2023-09-01 12:42:53,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 336 transitions, 684 flow [2023-09-01 12:42:53,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 336 transitions, 684 flow [2023-09-01 12:42:53,137 INFO L130 PetriNetUnfolder]: 28/336 cut-off events. [2023-09-01 12:42:53,137 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:42:53,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 336 events. 28/336 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 761 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2023-09-01 12:42:53,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 25652 [2023-09-01 12:43:02,883 INFO L134 LiptonReduction]: Checked pairs total: 22140 [2023-09-01 12:43:02,883 INFO L136 LiptonReduction]: Total number of compositions: 413 [2023-09-01 12:43:02,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:43:02,899 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;@660a725d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:43:02,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:43:02,904 INFO L130 PetriNetUnfolder]: 4/16 cut-off events. [2023-09-01 12:43:02,905 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:43:02,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:02,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:02,906 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 12:43:02,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash 200185486, now seen corresponding path program 1 times [2023-09-01 12:43:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:02,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68912427] [2023-09-01 12:43:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:02,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:03,669 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 12:43:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68912427] [2023-09-01 12:43:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68912427] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:43:03,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:43:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:43:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362429805] [2023-09-01 12:43:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:43:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:43:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:03,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:43:03,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:43:03,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 759 [2023-09-01 12:43:03,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:03,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:03,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 759 [2023-09-01 12:43:03,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:03,947 INFO L130 PetriNetUnfolder]: 99/168 cut-off events. [2023-09-01 12:43:03,948 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 12:43:03,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 99/168 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 490 event pairs, 15 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 294. Up to 91 conditions per place. [2023-09-01 12:43:03,950 INFO L137 encePairwiseOnDemand]: 752/759 looper letters, 32 selfloop transitions, 10 changer transitions 1/43 dead transitions. [2023-09-01 12:43:03,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 43 transitions, 199 flow [2023-09-01 12:43:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:43:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:43:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1563 transitions. [2023-09-01 12:43:03,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41185770750988143 [2023-09-01 12:43:03,974 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1563 transitions. [2023-09-01 12:43:03,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1563 transitions. [2023-09-01 12:43:03,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:03,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1563 transitions. [2023-09-01 12:43:03,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:03,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:03,999 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,001 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 46 flow. Second operand 5 states and 1563 transitions. [2023-09-01 12:43:04,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 43 transitions, 199 flow [2023-09-01 12:43:04,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:43:04,005 INFO L231 Difference]: Finished difference. Result has 23 places, 25 transitions, 99 flow [2023-09-01 12:43:04,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=25} [2023-09-01 12:43:04,009 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-09-01 12:43:04,009 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 25 transitions, 99 flow [2023-09-01 12:43:04,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.4) internal successors, (1527), 5 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:04,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:04,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:43:04,012 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 12:43:04,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash -419197718, now seen corresponding path program 1 times [2023-09-01 12:43:04,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:04,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468287894] [2023-09-01 12:43:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:04,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:04,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468287894] [2023-09-01 12:43:04,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468287894] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:43:04,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:43:04,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:43:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645584330] [2023-09-01 12:43:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:43:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:43:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:43:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:43:04,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 759 [2023-09-01 12:43:04,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 309.25) internal successors, (1237), 4 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:04,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 759 [2023-09-01 12:43:04,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:04,281 INFO L130 PetriNetUnfolder]: 109/196 cut-off events. [2023-09-01 12:43:04,281 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-09-01 12:43:04,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 196 events. 109/196 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 634 event pairs, 17 based on Foata normal form. 8/196 useless extension candidates. Maximal degree in co-relation 258. Up to 69 conditions per place. [2023-09-01 12:43:04,283 INFO L137 encePairwiseOnDemand]: 753/759 looper letters, 39 selfloop transitions, 13 changer transitions 2/54 dead transitions. [2023-09-01 12:43:04,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 54 transitions, 307 flow [2023-09-01 12:43:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:43:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:43:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1572 transitions. [2023-09-01 12:43:04,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142292490118577 [2023-09-01 12:43:04,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1572 transitions. [2023-09-01 12:43:04,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1572 transitions. [2023-09-01 12:43:04,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:04,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1572 transitions. [2023-09-01 12:43:04,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,301 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,301 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 99 flow. Second operand 5 states and 1572 transitions. [2023-09-01 12:43:04,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 54 transitions, 307 flow [2023-09-01 12:43:04,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 54 transitions, 305 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 12:43:04,305 INFO L231 Difference]: Finished difference. Result has 30 places, 34 transitions, 205 flow [2023-09-01 12:43:04,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=30, PETRI_TRANSITIONS=34} [2023-09-01 12:43:04,306 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-09-01 12:43:04,306 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 34 transitions, 205 flow [2023-09-01 12:43:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.25) internal successors, (1237), 4 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:04,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:04,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:43:04,308 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 12:43:04,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1716415558, now seen corresponding path program 2 times [2023-09-01 12:43:04,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:04,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928250987] [2023-09-01 12:43:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:04,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928250987] [2023-09-01 12:43:04,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928250987] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:43:04,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:43:04,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:43:04,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334715506] [2023-09-01 12:43:04,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:43:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:43:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:43:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:43:04,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 759 [2023-09-01 12:43:04,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 34 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:04,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 759 [2023-09-01 12:43:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:04,668 INFO L130 PetriNetUnfolder]: 169/319 cut-off events. [2023-09-01 12:43:04,668 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2023-09-01 12:43:04,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 319 events. 169/319 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1234 event pairs, 67 based on Foata normal form. 16/335 useless extension candidates. Maximal degree in co-relation 612. Up to 122 conditions per place. [2023-09-01 12:43:04,671 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 55 selfloop transitions, 9 changer transitions 2/66 dead transitions. [2023-09-01 12:43:04,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 66 transitions, 514 flow [2023-09-01 12:43:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:43:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:43:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1577 transitions. [2023-09-01 12:43:04,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155467720685112 [2023-09-01 12:43:04,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1577 transitions. [2023-09-01 12:43:04,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1577 transitions. [2023-09-01 12:43:04,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:04,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1577 transitions. [2023-09-01 12:43:04,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,689 INFO L175 Difference]: Start difference. First operand has 30 places, 34 transitions, 205 flow. Second operand 5 states and 1577 transitions. [2023-09-01 12:43:04,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 66 transitions, 514 flow [2023-09-01 12:43:04,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 66 transitions, 502 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-09-01 12:43:04,697 INFO L231 Difference]: Finished difference. Result has 37 places, 39 transitions, 278 flow [2023-09-01 12:43:04,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2023-09-01 12:43:04,698 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-09-01 12:43:04,701 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 278 flow [2023-09-01 12:43:04,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:04,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:04,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:43:04,703 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 12:43:04,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:04,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1708128844, now seen corresponding path program 1 times [2023-09-01 12:43:04,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:04,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179677491] [2023-09-01 12:43:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:04,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179677491] [2023-09-01 12:43:04,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179677491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:43:04,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:43:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:43:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862822097] [2023-09-01 12:43:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:43:04,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:43:04,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:43:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:43:04,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 759 [2023-09-01 12:43:04,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:04,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:04,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 759 [2023-09-01 12:43:04,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:04,987 INFO L130 PetriNetUnfolder]: 155/293 cut-off events. [2023-09-01 12:43:04,988 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-09-01 12:43:04,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 293 events. 155/293 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1124 event pairs, 16 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 758. Up to 134 conditions per place. [2023-09-01 12:43:04,992 INFO L137 encePairwiseOnDemand]: 753/759 looper letters, 39 selfloop transitions, 20 changer transitions 6/65 dead transitions. [2023-09-01 12:43:04,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 551 flow [2023-09-01 12:43:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:43:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:43:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1569 transitions. [2023-09-01 12:43:04,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134387351778656 [2023-09-01 12:43:04,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1569 transitions. [2023-09-01 12:43:04,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1569 transitions. [2023-09-01 12:43:04,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:05,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1569 transitions. [2023-09-01 12:43:05,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 313.8) internal successors, (1569), 5 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,015 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,015 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 278 flow. Second operand 5 states and 1569 transitions. [2023-09-01 12:43:05,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 551 flow [2023-09-01 12:43:05,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 541 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-09-01 12:43:05,020 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 399 flow [2023-09-01 12:43:05,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-09-01 12:43:05,022 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-09-01 12:43:05,022 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 399 flow [2023-09-01 12:43:05,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:05,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:05,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:43:05,024 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 12:43:05,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1411080757, now seen corresponding path program 1 times [2023-09-01 12:43:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393783675] [2023-09-01 12:43:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393783675] [2023-09-01 12:43:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393783675] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:43:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:43:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:43:05,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97965121] [2023-09-01 12:43:05,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:43:05,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:43:05,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:43:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:43:05,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 759 [2023-09-01 12:43:05,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 311.5) internal successors, (1246), 4 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:05,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 759 [2023-09-01 12:43:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:05,290 INFO L130 PetriNetUnfolder]: 94/176 cut-off events. [2023-09-01 12:43:05,290 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-09-01 12:43:05,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 176 events. 94/176 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 536 event pairs, 34 based on Foata normal form. 6/182 useless extension candidates. Maximal degree in co-relation 765. Up to 126 conditions per place. [2023-09-01 12:43:05,292 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 40 selfloop transitions, 4 changer transitions 10/54 dead transitions. [2023-09-01 12:43:05,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 510 flow [2023-09-01 12:43:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:43:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:43:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1573 transitions. [2023-09-01 12:43:05,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144927536231884 [2023-09-01 12:43:05,297 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1573 transitions. [2023-09-01 12:43:05,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1573 transitions. [2023-09-01 12:43:05,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:05,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1573 transitions. [2023-09-01 12:43:05,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,307 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,307 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 399 flow. Second operand 5 states and 1573 transitions. [2023-09-01 12:43:05,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 510 flow [2023-09-01 12:43:05,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 500 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-09-01 12:43:05,311 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 328 flow [2023-09-01 12:43:05,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-09-01 12:43:05,312 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-09-01 12:43:05,312 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 328 flow [2023-09-01 12:43:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.5) internal successors, (1246), 4 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:05,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:05,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:43:05,313 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 12:43:05,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1125366281, now seen corresponding path program 1 times [2023-09-01 12:43:05,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:05,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820018302] [2023-09-01 12:43:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:05,439 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 12:43:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820018302] [2023-09-01 12:43:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820018302] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220793225] [2023-09-01 12:43:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:05,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:05,449 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 12:43:05,476 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 12:43:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:43:05,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:05,676 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 12:43:05,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220793225] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:05,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:43:05,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-09-01 12:43:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675012337] [2023-09-01 12:43:05,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:43:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:43:05,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:43:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:43:05,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 759 [2023-09-01 12:43:05,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:05,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 759 [2023-09-01 12:43:05,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:05,882 INFO L130 PetriNetUnfolder]: 100/169 cut-off events. [2023-09-01 12:43:05,882 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-09-01 12:43:05,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 169 events. 100/169 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 440 event pairs, 18 based on Foata normal form. 16/185 useless extension candidates. Maximal degree in co-relation 767. Up to 111 conditions per place. [2023-09-01 12:43:05,884 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 40 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-09-01 12:43:05,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 458 flow [2023-09-01 12:43:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:43:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:43:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1550 transitions. [2023-09-01 12:43:05,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40843214756258234 [2023-09-01 12:43:05,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1550 transitions. [2023-09-01 12:43:05,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1550 transitions. [2023-09-01 12:43:05,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:05,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1550 transitions. [2023-09-01 12:43:05,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 310.0) internal successors, (1550), 5 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,899 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 759.0) internal successors, (4554), 6 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,899 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 328 flow. Second operand 5 states and 1550 transitions. [2023-09-01 12:43:05,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 458 flow [2023-09-01 12:43:05,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 410 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-09-01 12:43:05,903 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 303 flow [2023-09-01 12:43:05,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-09-01 12:43:05,904 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-09-01 12:43:05,904 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 303 flow [2023-09-01 12:43:05,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:05,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:05,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:05,912 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 12:43:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 12:43:06,111 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 12:43:06,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash -4780107, now seen corresponding path program 1 times [2023-09-01 12:43:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:06,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181223910] [2023-09-01 12:43:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:06,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:08,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:08,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181223910] [2023-09-01 12:43:08,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181223910] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:08,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563900159] [2023-09-01 12:43:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:08,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:08,482 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 12:43:08,492 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 12:43:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 12:43:08,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:09,078 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 143 treesize of output 107 [2023-09-01 12:43:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:09,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:10,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:10,224 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 253 treesize of output 221 [2023-09-01 12:43:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:10,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563900159] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:10,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:10,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-09-01 12:43:10,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151205222] [2023-09-01 12:43:10,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:43:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:43:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:43:12,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 759 [2023-09-01 12:43:12,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 303 flow. Second operand has 20 states, 20 states have (on average 276.25) internal successors, (5525), 20 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:12,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:12,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 759 [2023-09-01 12:43:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:13,177 INFO L130 PetriNetUnfolder]: 272/472 cut-off events. [2023-09-01 12:43:13,178 INFO L131 PetriNetUnfolder]: For 1192/1192 co-relation queries the response was YES. [2023-09-01 12:43:13,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 472 events. 272/472 cut-off events. For 1192/1192 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1811 event pairs, 6 based on Foata normal form. 3/475 useless extension candidates. Maximal degree in co-relation 1728. Up to 181 conditions per place. [2023-09-01 12:43:13,182 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 104 selfloop transitions, 55 changer transitions 7/166 dead transitions. [2023-09-01 12:43:13,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 166 transitions, 1411 flow [2023-09-01 12:43:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:43:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:43:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5332 transitions. [2023-09-01 12:43:13,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36973857568823243 [2023-09-01 12:43:13,196 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5332 transitions. [2023-09-01 12:43:13,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5332 transitions. [2023-09-01 12:43:13,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:13,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5332 transitions. [2023-09-01 12:43:13,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 280.63157894736844) internal successors, (5332), 19 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:13,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:13,242 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:13,242 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 303 flow. Second operand 19 states and 5332 transitions. [2023-09-01 12:43:13,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 166 transitions, 1411 flow [2023-09-01 12:43:13,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 166 transitions, 1408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 12:43:13,248 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 943 flow [2023-09-01 12:43:13,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=943, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-09-01 12:43:13,248 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-09-01 12:43:13,249 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 943 flow [2023-09-01 12:43:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 276.25) internal successors, (5525), 20 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:13,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:13,259 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 12:43:13,457 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,SelfDestructingSolverStorable6 [2023-09-01 12:43:13,457 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 12:43:13,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1877271009, now seen corresponding path program 2 times [2023-09-01 12:43:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:13,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290642553] [2023-09-01 12:43:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:13,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290642553] [2023-09-01 12:43:15,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290642553] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180349615] [2023-09-01 12:43:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:43:15,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:15,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:15,013 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 12:43:15,034 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 12:43:15,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:43:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:43:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 53 conjunts are in the unsatisfiable core [2023-09-01 12:43:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:15,556 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 137 treesize of output 101 [2023-09-01 12:43:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:15,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:16,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:16,532 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 253 treesize of output 221 [2023-09-01 12:43:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180349615] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:16,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:16,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-09-01 12:43:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672943230] [2023-09-01 12:43:16,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:43:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:43:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:43:18,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 759 [2023-09-01 12:43:18,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 943 flow. Second operand has 21 states, 21 states have (on average 281.04761904761904) internal successors, (5902), 21 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:18,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:18,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 759 [2023-09-01 12:43:18,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:20,391 INFO L130 PetriNetUnfolder]: 647/1126 cut-off events. [2023-09-01 12:43:20,391 INFO L131 PetriNetUnfolder]: For 7759/7759 co-relation queries the response was YES. [2023-09-01 12:43:20,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 1126 events. 647/1126 cut-off events. For 7759/7759 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5655 event pairs, 14 based on Foata normal form. 24/1150 useless extension candidates. Maximal degree in co-relation 5613. Up to 387 conditions per place. [2023-09-01 12:43:20,403 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 172 selfloop transitions, 212 changer transitions 17/401 dead transitions. [2023-09-01 12:43:20,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 401 transitions, 4549 flow [2023-09-01 12:43:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 12:43:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 12:43:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 13122 transitions. [2023-09-01 12:43:20,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37583777281319813 [2023-09-01 12:43:20,434 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 13122 transitions. [2023-09-01 12:43:20,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 13122 transitions. [2023-09-01 12:43:20,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:20,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 13122 transitions. [2023-09-01 12:43:20,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 285.2608695652174) internal successors, (13122), 46 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:20,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 759.0) internal successors, (35673), 47 states have internal predecessors, (35673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:20,510 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 759.0) internal successors, (35673), 47 states have internal predecessors, (35673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:20,510 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 943 flow. Second operand 46 states and 13122 transitions. [2023-09-01 12:43:20,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 401 transitions, 4549 flow [2023-09-01 12:43:20,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 401 transitions, 4260 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-09-01 12:43:20,552 INFO L231 Difference]: Finished difference. Result has 125 places, 253 transitions, 3493 flow [2023-09-01 12:43:20,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3493, PETRI_PLACES=125, PETRI_TRANSITIONS=253} [2023-09-01 12:43:20,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-09-01 12:43:20,554 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 253 transitions, 3493 flow [2023-09-01 12:43:20,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 281.04761904761904) internal successors, (5902), 21 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:20,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:20,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:20,562 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 12:43:20,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:20,763 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 12:43:20,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1904976639, now seen corresponding path program 3 times [2023-09-01 12:43:20,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:20,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006562911] [2023-09-01 12:43:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:20,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006562911] [2023-09-01 12:43:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006562911] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512749441] [2023-09-01 12:43:22,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:43:22,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:22,377 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 12:43:22,380 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 12:43:22,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:43:22,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:43:22,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 12:43:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:22,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:43:22,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:43:22,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:43:22,942 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 143 treesize of output 107 [2023-09-01 12:43:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:23,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512749441] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:24,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:24,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-09-01 12:43:24,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016593564] [2023-09-01 12:43:24,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:24,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:43:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:43:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=326, Unknown=4, NotChecked=0, Total=420 [2023-09-01 12:43:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 759 [2023-09-01 12:43:25,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 253 transitions, 3493 flow. Second operand has 21 states, 21 states have (on average 245.0) internal successors, (5145), 21 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:25,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:25,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 759 [2023-09-01 12:43:25,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:31,863 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 84 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:43:35,758 INFO L130 PetriNetUnfolder]: 713/1249 cut-off events. [2023-09-01 12:43:35,759 INFO L131 PetriNetUnfolder]: For 11887/11887 co-relation queries the response was YES. [2023-09-01 12:43:35,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8707 conditions, 1249 events. 713/1249 cut-off events. For 11887/11887 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6482 event pairs, 34 based on Foata normal form. 3/1252 useless extension candidates. Maximal degree in co-relation 7940. Up to 526 conditions per place. [2023-09-01 12:43:35,771 INFO L137 encePairwiseOnDemand]: 750/759 looper letters, 199 selfloop transitions, 158 changer transitions 10/367 dead transitions. [2023-09-01 12:43:35,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 367 transitions, 5322 flow [2023-09-01 12:43:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 12:43:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 12:43:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6231 transitions. [2023-09-01 12:43:35,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3283794466403162 [2023-09-01 12:43:35,782 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6231 transitions. [2023-09-01 12:43:35,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6231 transitions. [2023-09-01 12:43:35,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:35,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6231 transitions. [2023-09-01 12:43:35,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 249.24) internal successors, (6231), 25 states have internal predecessors, (6231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:35,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 759.0) internal successors, (19734), 26 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:35,810 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 759.0) internal successors, (19734), 26 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:35,810 INFO L175 Difference]: Start difference. First operand has 125 places, 253 transitions, 3493 flow. Second operand 25 states and 6231 transitions. [2023-09-01 12:43:35,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 367 transitions, 5322 flow [2023-09-01 12:43:35,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 367 transitions, 4260 flow, removed 496 selfloop flow, removed 9 redundant places. [2023-09-01 12:43:35,884 INFO L231 Difference]: Finished difference. Result has 151 places, 290 transitions, 3554 flow [2023-09-01 12:43:35,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3554, PETRI_PLACES=151, PETRI_TRANSITIONS=290} [2023-09-01 12:43:35,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-09-01 12:43:35,885 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 290 transitions, 3554 flow [2023-09-01 12:43:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 245.0) internal successors, (5145), 21 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:35,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:35,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:35,895 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 12:43:36,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:36,089 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 12:43:36,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:36,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1874892425, now seen corresponding path program 4 times [2023-09-01 12:43:36,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:36,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213087031] [2023-09-01 12:43:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:36,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:38,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213087031] [2023-09-01 12:43:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213087031] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154476350] [2023-09-01 12:43:38,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:43:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:38,860 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 12:43:38,862 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 12:43:38,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:43:38,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:43:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:43:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:39,418 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 123 treesize of output 103 [2023-09-01 12:43:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:39,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:40,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:40,157 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 349 treesize of output 261 [2023-09-01 12:43:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:40,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154476350] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:40,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:40,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-09-01 12:43:40,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466326581] [2023-09-01 12:43:40,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:40,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:43:40,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:43:40,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:43:42,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 759 [2023-09-01 12:43:42,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 290 transitions, 3554 flow. Second operand has 22 states, 22 states have (on average 275.95454545454544) internal successors, (6071), 22 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:42,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:42,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 759 [2023-09-01 12:43:42,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:45,958 INFO L130 PetriNetUnfolder]: 799/1438 cut-off events. [2023-09-01 12:43:45,959 INFO L131 PetriNetUnfolder]: For 9008/9008 co-relation queries the response was YES. [2023-09-01 12:43:45,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8860 conditions, 1438 events. 799/1438 cut-off events. For 9008/9008 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7882 event pairs, 14 based on Foata normal form. 11/1449 useless extension candidates. Maximal degree in co-relation 8745. Up to 414 conditions per place. [2023-09-01 12:43:45,973 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 153 selfloop transitions, 292 changer transitions 21/466 dead transitions. [2023-09-01 12:43:45,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 466 transitions, 5847 flow [2023-09-01 12:43:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 12:43:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 12:43:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 10343 transitions. [2023-09-01 12:43:45,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683011074315422 [2023-09-01 12:43:45,985 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 10343 transitions. [2023-09-01 12:43:45,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 10343 transitions. [2023-09-01 12:43:45,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:45,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 10343 transitions. [2023-09-01 12:43:46,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 279.5405405405405) internal successors, (10343), 37 states have internal predecessors, (10343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:46,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 759.0) internal successors, (28842), 38 states have internal predecessors, (28842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:46,022 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 759.0) internal successors, (28842), 38 states have internal predecessors, (28842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:46,023 INFO L175 Difference]: Start difference. First operand has 151 places, 290 transitions, 3554 flow. Second operand 37 states and 10343 transitions. [2023-09-01 12:43:46,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 466 transitions, 5847 flow [2023-09-01 12:43:46,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 466 transitions, 5634 flow, removed 81 selfloop flow, removed 9 redundant places. [2023-09-01 12:43:46,090 INFO L231 Difference]: Finished difference. Result has 187 places, 371 transitions, 5451 flow [2023-09-01 12:43:46,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5451, PETRI_PLACES=187, PETRI_TRANSITIONS=371} [2023-09-01 12:43:46,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2023-09-01 12:43:46,092 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 371 transitions, 5451 flow [2023-09-01 12:43:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 275.95454545454544) internal successors, (6071), 22 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:46,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:46,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:46,101 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 12:43:46,298 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 12:43:46,299 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 12:43:46,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1562389633, now seen corresponding path program 5 times [2023-09-01 12:43:46,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:46,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357489775] [2023-09-01 12:43:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:47,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357489775] [2023-09-01 12:43:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357489775] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274002823] [2023-09-01 12:43:47,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:43:47,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:47,138 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 12:43:47,140 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 12:43:47,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:43:47,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:43:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:43:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:47,676 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 123 treesize of output 103 [2023-09-01 12:43:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:47,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:48,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:48,441 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 349 treesize of output 261 [2023-09-01 12:43:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274002823] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:49,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:49,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-09-01 12:43:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436965611] [2023-09-01 12:43:49,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:49,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:43:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:43:49,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-09-01 12:43:50,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 759 [2023-09-01 12:43:50,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 371 transitions, 5451 flow. Second operand has 22 states, 22 states have (on average 281.0) internal successors, (6182), 22 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:50,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:50,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 759 [2023-09-01 12:43:50,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:51,908 INFO L130 PetriNetUnfolder]: 788/1403 cut-off events. [2023-09-01 12:43:51,909 INFO L131 PetriNetUnfolder]: For 11309/11309 co-relation queries the response was YES. [2023-09-01 12:43:51,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10021 conditions, 1403 events. 788/1403 cut-off events. For 11309/11309 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7559 event pairs, 15 based on Foata normal form. 9/1412 useless extension candidates. Maximal degree in co-relation 9951. Up to 400 conditions per place. [2023-09-01 12:43:51,926 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 139 selfloop transitions, 301 changer transitions 13/453 dead transitions. [2023-09-01 12:43:51,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 453 transitions, 6676 flow [2023-09-01 12:43:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:43:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:43:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8829 transitions. [2023-09-01 12:43:51,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37523906668366697 [2023-09-01 12:43:51,935 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8829 transitions. [2023-09-01 12:43:51,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8829 transitions. [2023-09-01 12:43:51,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:51,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8829 transitions. [2023-09-01 12:43:51,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 284.80645161290323) internal successors, (8829), 31 states have internal predecessors, (8829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:51,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 759.0) internal successors, (24288), 32 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:51,962 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 759.0) internal successors, (24288), 32 states have internal predecessors, (24288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:51,962 INFO L175 Difference]: Start difference. First operand has 187 places, 371 transitions, 5451 flow. Second operand 31 states and 8829 transitions. [2023-09-01 12:43:51,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 453 transitions, 6676 flow [2023-09-01 12:43:52,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 453 transitions, 6325 flow, removed 114 selfloop flow, removed 16 redundant places. [2023-09-01 12:43:52,045 INFO L231 Difference]: Finished difference. Result has 200 places, 375 transitions, 5830 flow [2023-09-01 12:43:52,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5830, PETRI_PLACES=200, PETRI_TRANSITIONS=375} [2023-09-01 12:43:52,046 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-09-01 12:43:52,046 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 375 transitions, 5830 flow [2023-09-01 12:43:52,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 281.0) internal successors, (6182), 22 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:52,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:52,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:52,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:43:52,256 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 12:43:52,256 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 12:43:52,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1534684003, now seen corresponding path program 6 times [2023-09-01 12:43:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646398736] [2023-09-01 12:43:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:52,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646398736] [2023-09-01 12:43:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646398736] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436544451] [2023-09-01 12:43:52,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:43:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:52,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:43:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:43:53,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:43:53,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:43:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 12:43:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:53,428 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 123 treesize of output 103 [2023-09-01 12:43:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:53,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:54,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:54,089 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 339 treesize of output 251 [2023-09-01 12:43:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:54,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436544451] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:54,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:54,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-09-01 12:43:54,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759469650] [2023-09-01 12:43:54,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:54,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:43:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:43:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:43:55,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 759 [2023-09-01 12:43:55,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 375 transitions, 5830 flow. Second operand has 18 states, 18 states have (on average 285.3333333333333) internal successors, (5136), 18 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:55,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:55,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 759 [2023-09-01 12:43:55,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:56,035 INFO L130 PetriNetUnfolder]: 790/1396 cut-off events. [2023-09-01 12:43:56,035 INFO L131 PetriNetUnfolder]: For 9236/9236 co-relation queries the response was YES. [2023-09-01 12:43:56,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10342 conditions, 1396 events. 790/1396 cut-off events. For 9236/9236 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7397 event pairs, 41 based on Foata normal form. 2/1398 useless extension candidates. Maximal degree in co-relation 10229. Up to 680 conditions per place. [2023-09-01 12:43:56,046 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 251 selfloop transitions, 164 changer transitions 10/425 dead transitions. [2023-09-01 12:43:56,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 425 transitions, 6887 flow [2023-09-01 12:43:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:43:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:43:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6065 transitions. [2023-09-01 12:43:56,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38051320660016313 [2023-09-01 12:43:56,052 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6065 transitions. [2023-09-01 12:43:56,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6065 transitions. [2023-09-01 12:43:56,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:56,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6065 transitions. [2023-09-01 12:43:56,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 288.8095238095238) internal successors, (6065), 21 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:56,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 759.0) internal successors, (16698), 22 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:56,072 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 759.0) internal successors, (16698), 22 states have internal predecessors, (16698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:56,072 INFO L175 Difference]: Start difference. First operand has 200 places, 375 transitions, 5830 flow. Second operand 21 states and 6065 transitions. [2023-09-01 12:43:56,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 425 transitions, 6887 flow [2023-09-01 12:43:56,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 425 transitions, 6639 flow, removed 36 selfloop flow, removed 20 redundant places. [2023-09-01 12:43:56,150 INFO L231 Difference]: Finished difference. Result has 200 places, 375 transitions, 5939 flow [2023-09-01 12:43:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5939, PETRI_PLACES=200, PETRI_TRANSITIONS=375} [2023-09-01 12:43:56,151 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-09-01 12:43:56,152 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 375 transitions, 5939 flow [2023-09-01 12:43:56,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 285.3333333333333) internal successors, (5136), 18 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:56,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:43:56,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:43:56,163 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 12:43:56,358 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 12:43:56,358 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 12:43:56,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:43:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash 761414257, now seen corresponding path program 7 times [2023-09-01 12:43:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:43:56,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141596066] [2023-09-01 12:43:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:43:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:43:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:43:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:43:57,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141596066] [2023-09-01 12:43:57,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141596066] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:43:57,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733283314] [2023-09-01 12:43:57,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:43:57,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:43:57,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:43:57,269 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:43:57,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:43:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:43:57,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:43:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:43:57,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:43:57,600 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 12:43:57,772 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 143 treesize of output 107 [2023-09-01 12:43:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:57,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:43:58,248 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~bag1~0 c_~sum1~0)) (.cse2 (+ c_~A~0.offset (* c_~j~0 4)))) (and (forall ((v_ArrVal_312 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_312) c_~A~0.base) .cse2))) (or (< 2147483647 (+ c_~bag2~0 .cse0)) (< (+ c_~bag2~0 .cse0 2147483648) 0) (<= (+ c_~bag2~0 .cse0 c_~sum2~0) .cse1)))) (forall ((v_ArrVal_312 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_312) c_~A~0.base) .cse2))) (or (< 2147483647 (+ c_~bag2~0 .cse3)) (<= .cse1 (+ c_~bag2~0 .cse3 c_~sum2~0)) (< (+ c_~bag2~0 .cse3 2147483648) 0)))))) is different from false [2023-09-01 12:43:58,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:43:58,510 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 427 treesize of output 371 [2023-09-01 12:43:58,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 169 treesize of output 151 [2023-09-01 12:43:58,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 151 treesize of output 133 [2023-09-01 12:43:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:43:58,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733283314] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:43:58,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:43:58,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-09-01 12:43:58,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830993636] [2023-09-01 12:43:58,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:43:58,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:43:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:43:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:43:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=344, Unknown=1, NotChecked=38, Total=462 [2023-09-01 12:43:59,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 759 [2023-09-01 12:43:59,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 375 transitions, 5939 flow. Second operand has 22 states, 22 states have (on average 247.9090909090909) internal successors, (5454), 22 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:59,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:43:59,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 759 [2023-09-01 12:43:59,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:43:59,909 INFO L130 PetriNetUnfolder]: 796/1410 cut-off events. [2023-09-01 12:43:59,909 INFO L131 PetriNetUnfolder]: For 9902/9902 co-relation queries the response was YES. [2023-09-01 12:43:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10585 conditions, 1410 events. 796/1410 cut-off events. For 9902/9902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7533 event pairs, 54 based on Foata normal form. 2/1412 useless extension candidates. Maximal degree in co-relation 10473. Up to 917 conditions per place. [2023-09-01 12:43:59,920 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 330 selfloop transitions, 75 changer transitions 8/413 dead transitions. [2023-09-01 12:43:59,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 413 transitions, 6957 flow [2023-09-01 12:43:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:43:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:43:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3786 transitions. [2023-09-01 12:43:59,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325428194993412 [2023-09-01 12:43:59,923 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3786 transitions. [2023-09-01 12:43:59,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3786 transitions. [2023-09-01 12:43:59,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:43:59,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3786 transitions. [2023-09-01 12:43:59,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 252.4) internal successors, (3786), 15 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:59,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 759.0) internal successors, (12144), 16 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:59,935 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 759.0) internal successors, (12144), 16 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:43:59,935 INFO L175 Difference]: Start difference. First operand has 200 places, 375 transitions, 5939 flow. Second operand 15 states and 3786 transitions. [2023-09-01 12:43:59,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 413 transitions, 6957 flow [2023-09-01 12:44:00,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 413 transitions, 6747 flow, removed 14 selfloop flow, removed 16 redundant places. [2023-09-01 12:44:00,039 INFO L231 Difference]: Finished difference. Result has 200 places, 377 transitions, 5948 flow [2023-09-01 12:44:00,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5948, PETRI_PLACES=200, PETRI_TRANSITIONS=377} [2023-09-01 12:44:00,039 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-09-01 12:44:00,040 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 377 transitions, 5948 flow [2023-09-01 12:44:00,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 247.9090909090909) internal successors, (5454), 22 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:00,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:00,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:00,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 12:44:00,241 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 12:44:00,241 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 12:44:00,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1100080267, now seen corresponding path program 8 times [2023-09-01 12:44:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232730351] [2023-09-01 12:44:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232730351] [2023-09-01 12:44:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232730351] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146961093] [2023-09-01 12:44:01,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:44:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:01,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:01,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:44:01,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:44:01,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 12:44:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:01,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:44:01,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:44:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:44:01,966 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 12:44:02,157 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 137 treesize of output 101 [2023-09-01 12:44:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:02,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:03,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:44:03,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-09-01 12:44:03,517 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 228 treesize of output 204 [2023-09-01 12:44:03,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 134 treesize of output 122 [2023-09-01 12:44:03,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 63 treesize of output 57 [2023-09-01 12:44:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:03,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146961093] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:03,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:03,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-09-01 12:44:03,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12496367] [2023-09-01 12:44:03,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:03,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:44:03,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:44:03,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=501, Unknown=2, NotChecked=0, Total=600 [2023-09-01 12:44:04,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 759 [2023-09-01 12:44:04,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 377 transitions, 5948 flow. Second operand has 25 states, 25 states have (on average 244.72) internal successors, (6118), 25 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:04,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:04,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 759 [2023-09-01 12:44:04,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:06,405 INFO L130 PetriNetUnfolder]: 862/1536 cut-off events. [2023-09-01 12:44:06,405 INFO L131 PetriNetUnfolder]: For 10826/10826 co-relation queries the response was YES. [2023-09-01 12:44:06,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11375 conditions, 1536 events. 862/1536 cut-off events. For 10826/10826 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8463 event pairs, 34 based on Foata normal form. 2/1538 useless extension candidates. Maximal degree in co-relation 11233. Up to 865 conditions per place. [2023-09-01 12:44:06,417 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 242 selfloop transitions, 208 changer transitions 5/455 dead transitions. [2023-09-01 12:44:06,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 455 transitions, 7598 flow [2023-09-01 12:44:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:44:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:44:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4720 transitions. [2023-09-01 12:44:06,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32730046460023576 [2023-09-01 12:44:06,421 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4720 transitions. [2023-09-01 12:44:06,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4720 transitions. [2023-09-01 12:44:06,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:06,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4720 transitions. [2023-09-01 12:44:06,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 248.42105263157896) internal successors, (4720), 19 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:06,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:06,436 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:06,436 INFO L175 Difference]: Start difference. First operand has 200 places, 377 transitions, 5948 flow. Second operand 19 states and 4720 transitions. [2023-09-01 12:44:06,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 455 transitions, 7598 flow [2023-09-01 12:44:06,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 455 transitions, 7478 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-09-01 12:44:06,516 INFO L231 Difference]: Finished difference. Result has 208 places, 406 transitions, 6780 flow [2023-09-01 12:44:06,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5832, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6780, PETRI_PLACES=208, PETRI_TRANSITIONS=406} [2023-09-01 12:44:06,517 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-09-01 12:44:06,517 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 406 transitions, 6780 flow [2023-09-01 12:44:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 244.72) internal successors, (6118), 25 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:06,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:06,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:06,523 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 12:44:06,719 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 12:44:06,719 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 12:44:06,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2101266629, now seen corresponding path program 9 times [2023-09-01 12:44:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026923834] [2023-09-01 12:44:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026923834] [2023-09-01 12:44:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026923834] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968155907] [2023-09-01 12:44:06,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:44:06,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:06,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:06,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:44:06,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:44:06,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:44:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:07,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:07,443 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 265 treesize of output 201 [2023-09-01 12:44:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968155907] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:07,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-09-01 12:44:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873583700] [2023-09-01 12:44:07,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:44:07,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:44:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:44:07,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 759 [2023-09-01 12:44:07,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 406 transitions, 6780 flow. Second operand has 16 states, 16 states have (on average 296.9375) internal successors, (4751), 16 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 12:44:07,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:07,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 759 [2023-09-01 12:44:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:08,587 INFO L130 PetriNetUnfolder]: 808/1431 cut-off events. [2023-09-01 12:44:08,587 INFO L131 PetriNetUnfolder]: For 12169/12169 co-relation queries the response was YES. [2023-09-01 12:44:08,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10979 conditions, 1431 events. 808/1431 cut-off events. For 12169/12169 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7604 event pairs, 82 based on Foata normal form. 61/1492 useless extension candidates. Maximal degree in co-relation 10925. Up to 474 conditions per place. [2023-09-01 12:44:08,598 INFO L137 encePairwiseOnDemand]: 751/759 looper letters, 205 selfloop transitions, 222 changer transitions 0/427 dead transitions. [2023-09-01 12:44:08,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 427 transitions, 7280 flow [2023-09-01 12:44:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:44:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:44:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5689 transitions. [2023-09-01 12:44:08,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944941404895638 [2023-09-01 12:44:08,612 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5689 transitions. [2023-09-01 12:44:08,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5689 transitions. [2023-09-01 12:44:08,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:08,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5689 transitions. [2023-09-01 12:44:08,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 299.42105263157896) internal successors, (5689), 19 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:08,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:08,626 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 759.0) internal successors, (15180), 20 states have internal predecessors, (15180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:08,626 INFO L175 Difference]: Start difference. First operand has 208 places, 406 transitions, 6780 flow. Second operand 19 states and 5689 transitions. [2023-09-01 12:44:08,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 427 transitions, 7280 flow [2023-09-01 12:44:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 427 transitions, 6957 flow, removed 23 selfloop flow, removed 22 redundant places. [2023-09-01 12:44:08,711 INFO L231 Difference]: Finished difference. Result has 202 places, 380 transitions, 6523 flow [2023-09-01 12:44:08,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6523, PETRI_PLACES=202, PETRI_TRANSITIONS=380} [2023-09-01 12:44:08,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-09-01 12:44:08,712 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 380 transitions, 6523 flow [2023-09-01 12:44:08,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 296.9375) internal successors, (4751), 16 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 12:44:08,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:08,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:08,717 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 12:44:08,913 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 12:44:08,913 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 12:44:08,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash 962779119, now seen corresponding path program 10 times [2023-09-01 12:44:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828605412] [2023-09-01 12:44:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:09,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:09,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828605412] [2023-09-01 12:44:09,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828605412] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881810500] [2023-09-01 12:44:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:44:09,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:09,049 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:09,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:44:09,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:44:09,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:44:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:09,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:09,686 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:44:09,687 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 353 treesize of output 249 [2023-09-01 12:44:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881810500] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:09,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:09,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 12:44:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878075301] [2023-09-01 12:44:09,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:09,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:44:09,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:44:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:44:10,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 759 [2023-09-01 12:44:10,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 380 transitions, 6523 flow. Second operand has 13 states, 13 states have (on average 292.7692307692308) internal successors, (3806), 13 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:10,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:10,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 759 [2023-09-01 12:44:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:10,416 INFO L130 PetriNetUnfolder]: 588/1107 cut-off events. [2023-09-01 12:44:10,416 INFO L131 PetriNetUnfolder]: For 9578/9578 co-relation queries the response was YES. [2023-09-01 12:44:10,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8954 conditions, 1107 events. 588/1107 cut-off events. For 9578/9578 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5929 event pairs, 106 based on Foata normal form. 96/1203 useless extension candidates. Maximal degree in co-relation 8900. Up to 296 conditions per place. [2023-09-01 12:44:10,425 INFO L137 encePairwiseOnDemand]: 754/759 looper letters, 221 selfloop transitions, 77 changer transitions 29/327 dead transitions. [2023-09-01 12:44:10,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 327 transitions, 6156 flow [2023-09-01 12:44:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:44:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:44:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2371 transitions. [2023-09-01 12:44:10,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904808959156785 [2023-09-01 12:44:10,439 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2371 transitions. [2023-09-01 12:44:10,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2371 transitions. [2023-09-01 12:44:10,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:10,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2371 transitions. [2023-09-01 12:44:10,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 296.375) internal successors, (2371), 8 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:10,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 759.0) internal successors, (6831), 9 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:10,447 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 759.0) internal successors, (6831), 9 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:10,447 INFO L175 Difference]: Start difference. First operand has 202 places, 380 transitions, 6523 flow. Second operand 8 states and 2371 transitions. [2023-09-01 12:44:10,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 327 transitions, 6156 flow [2023-09-01 12:44:10,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 327 transitions, 5841 flow, removed 50 selfloop flow, removed 12 redundant places. [2023-09-01 12:44:10,528 INFO L231 Difference]: Finished difference. Result has 193 places, 282 transitions, 4919 flow [2023-09-01 12:44:10,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4919, PETRI_PLACES=193, PETRI_TRANSITIONS=282} [2023-09-01 12:44:10,529 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 173 predicate places. [2023-09-01 12:44:10,530 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 282 transitions, 4919 flow [2023-09-01 12:44:10,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 292.7692307692308) internal successors, (3806), 13 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:10,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:10,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:10,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 12:44:10,738 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 12:44:10,738 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 12:44:10,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1145652988, now seen corresponding path program 11 times [2023-09-01 12:44:10,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:10,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380734477] [2023-09-01 12:44:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:10,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380734477] [2023-09-01 12:44:10,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380734477] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:10,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660579762] [2023-09-01 12:44:10,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:44:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:10,885 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:10,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:44:10,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:44:10,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:10,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 12:44:10,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:11,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:11,370 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 209 treesize of output 193 [2023-09-01 12:44:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660579762] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:11,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:11,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 12:44:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276561600] [2023-09-01 12:44:11,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:11,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:44:11,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:44:11,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:44:11,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 759 [2023-09-01 12:44:11,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 282 transitions, 4919 flow. Second operand has 12 states, 12 states have (on average 301.5) internal successors, (3618), 12 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:11,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:11,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 759 [2023-09-01 12:44:11,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:11,774 INFO L130 PetriNetUnfolder]: 221/415 cut-off events. [2023-09-01 12:44:11,774 INFO L131 PetriNetUnfolder]: For 2709/2709 co-relation queries the response was YES. [2023-09-01 12:44:11,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 415 events. 221/415 cut-off events. For 2709/2709 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1545 event pairs, 64 based on Foata normal form. 15/430 useless extension candidates. Maximal degree in co-relation 2866. Up to 295 conditions per place. [2023-09-01 12:44:11,778 INFO L137 encePairwiseOnDemand]: 753/759 looper letters, 107 selfloop transitions, 11 changer transitions 14/132 dead transitions. [2023-09-01 12:44:11,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 132 transitions, 1978 flow [2023-09-01 12:44:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:44:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:44:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2129 transitions. [2023-09-01 12:44:11,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007152268021833 [2023-09-01 12:44:11,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2129 transitions. [2023-09-01 12:44:11,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2129 transitions. [2023-09-01 12:44:11,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:11,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2129 transitions. [2023-09-01 12:44:11,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 304.14285714285717) internal successors, (2129), 7 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:11,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 759.0) internal successors, (6072), 8 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:11,797 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 759.0) internal successors, (6072), 8 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:11,797 INFO L175 Difference]: Start difference. First operand has 193 places, 282 transitions, 4919 flow. Second operand 7 states and 2129 transitions. [2023-09-01 12:44:11,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 132 transitions, 1978 flow [2023-09-01 12:44:11,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 1822 flow, removed 2 selfloop flow, removed 24 redundant places. [2023-09-01 12:44:11,814 INFO L231 Difference]: Finished difference. Result has 128 places, 113 transitions, 1439 flow [2023-09-01 12:44:11,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1439, PETRI_PLACES=128, PETRI_TRANSITIONS=113} [2023-09-01 12:44:11,815 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 108 predicate places. [2023-09-01 12:44:11,815 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 113 transitions, 1439 flow [2023-09-01 12:44:11,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 301.5) internal successors, (3618), 12 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:11,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:11,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:11,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:44:12,021 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 12:44:12,021 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 12:44:12,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1590715580, now seen corresponding path program 12 times [2023-09-01 12:44:12,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:12,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179378735] [2023-09-01 12:44:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:27,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:27,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179378735] [2023-09-01 12:44:27,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179378735] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:27,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60095611] [2023-09-01 12:44:27,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:44:27,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:27,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:27,118 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:44:27,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:44:27,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:44:27,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 89 conjunts are in the unsatisfiable core [2023-09-01 12:44:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:27,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:44:27,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:44:27,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:44:28,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:44:28,242 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 234 treesize of output 154 [2023-09-01 12:44:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:44:35,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60095611] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:35,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:35,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 35 [2023-09-01 12:44:35,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731071044] [2023-09-01 12:44:35,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:35,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 12:44:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 12:44:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1098, Unknown=2, NotChecked=0, Total=1260 [2023-09-01 12:44:45,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 759 [2023-09-01 12:44:45,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 113 transitions, 1439 flow. Second operand has 36 states, 36 states have (on average 232.58333333333334) internal successors, (8373), 36 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:45,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:45,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 759 [2023-09-01 12:44:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:06,269 WARN L222 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 214 DAG size of output: 179 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:45:15,246 INFO L130 PetriNetUnfolder]: 536/937 cut-off events. [2023-09-01 12:45:15,246 INFO L131 PetriNetUnfolder]: For 5210/5210 co-relation queries the response was YES. [2023-09-01 12:45:15,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6390 conditions, 937 events. 536/937 cut-off events. For 5210/5210 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4372 event pairs, 11 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 6346. Up to 355 conditions per place. [2023-09-01 12:45:15,251 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 173 selfloop transitions, 203 changer transitions 4/380 dead transitions. [2023-09-01 12:45:15,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 380 transitions, 4736 flow [2023-09-01 12:45:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 12:45:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 12:45:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 11090 transitions. [2023-09-01 12:45:15,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31087937655930253 [2023-09-01 12:45:15,259 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 11090 transitions. [2023-09-01 12:45:15,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 11090 transitions. [2023-09-01 12:45:15,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:15,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 11090 transitions. [2023-09-01 12:45:15,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 235.95744680851064) internal successors, (11090), 47 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:15,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 759.0) internal successors, (36432), 48 states have internal predecessors, (36432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:15,280 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 759.0) internal successors, (36432), 48 states have internal predecessors, (36432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:15,280 INFO L175 Difference]: Start difference. First operand has 128 places, 113 transitions, 1439 flow. Second operand 47 states and 11090 transitions. [2023-09-01 12:45:15,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 380 transitions, 4736 flow [2023-09-01 12:45:15,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 380 transitions, 4698 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 12:45:15,308 INFO L231 Difference]: Finished difference. Result has 159 places, 261 transitions, 3993 flow [2023-09-01 12:45:15,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3993, PETRI_PLACES=159, PETRI_TRANSITIONS=261} [2023-09-01 12:45:15,309 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 139 predicate places. [2023-09-01 12:45:15,309 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 261 transitions, 3993 flow [2023-09-01 12:45:15,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 232.58333333333334) internal successors, (8373), 36 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:15,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:15,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:15,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:15,516 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 12:45:15,516 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 12:45:15,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1379553724, now seen corresponding path program 13 times [2023-09-01 12:45:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967789125] [2023-09-01 12:45:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:19,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:19,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967789125] [2023-09-01 12:45:19,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967789125] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:19,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225286000] [2023-09-01 12:45:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:45:19,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:19,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:19,013 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:45:19,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:45:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 12:45:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:20,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:45:20,055 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 295 treesize of output 191 [2023-09-01 12:45:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:20,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:25,383 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-09-01 12:45:25,384 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 469 treesize of output 201 [2023-09-01 12:45:26,294 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-09-01 12:45:26,294 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 940 treesize of output 1 [2023-09-01 12:45:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:45:27,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225286000] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:27,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:27,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 33 [2023-09-01 12:45:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285355069] [2023-09-01 12:45:27,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:27,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 12:45:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 12:45:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 12:45:33,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 759 [2023-09-01 12:45:33,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 261 transitions, 3993 flow. Second operand has 34 states, 34 states have (on average 267.6764705882353) internal successors, (9101), 34 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:33,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:33,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 759 [2023-09-01 12:45:33,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:58,833 INFO L130 PetriNetUnfolder]: 1506/2544 cut-off events. [2023-09-01 12:45:58,833 INFO L131 PetriNetUnfolder]: For 18019/18019 co-relation queries the response was YES. [2023-09-01 12:45:58,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19760 conditions, 2544 events. 1506/2544 cut-off events. For 18019/18019 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14177 event pairs, 18 based on Foata normal form. 10/2554 useless extension candidates. Maximal degree in co-relation 19710. Up to 827 conditions per place. [2023-09-01 12:45:58,854 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 280 selfloop transitions, 634 changer transitions 24/938 dead transitions. [2023-09-01 12:45:58,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 938 transitions, 14079 flow [2023-09-01 12:45:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-09-01 12:45:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-09-01 12:45:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 26597 transitions. [2023-09-01 12:45:58,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357573068753193 [2023-09-01 12:45:58,876 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 26597 transitions. [2023-09-01 12:45:58,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 26597 transitions. [2023-09-01 12:45:58,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:58,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 26597 transitions. [2023-09-01 12:45:58,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 271.3979591836735) internal successors, (26597), 98 states have internal predecessors, (26597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:58,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 759.0) internal successors, (75141), 99 states have internal predecessors, (75141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:58,957 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 759.0) internal successors, (75141), 99 states have internal predecessors, (75141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:58,957 INFO L175 Difference]: Start difference. First operand has 159 places, 261 transitions, 3993 flow. Second operand 98 states and 26597 transitions. [2023-09-01 12:45:58,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 938 transitions, 14079 flow [2023-09-01 12:45:59,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 938 transitions, 13278 flow, removed 233 selfloop flow, removed 12 redundant places. [2023-09-01 12:45:59,156 INFO L231 Difference]: Finished difference. Result has 258 places, 702 transitions, 12130 flow [2023-09-01 12:45:59,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=12130, PETRI_PLACES=258, PETRI_TRANSITIONS=702} [2023-09-01 12:45:59,157 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-09-01 12:45:59,157 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 702 transitions, 12130 flow [2023-09-01 12:45:59,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.6764705882353) internal successors, (9101), 34 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:59,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:59,159 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:59,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 12:45:59,364 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 12:45:59,365 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 12:45:59,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1053050234, now seen corresponding path program 14 times [2023-09-01 12:45:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806212720] [2023-09-01 12:45:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:47:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:37,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:47:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806212720] [2023-09-01 12:47:37,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806212720] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:47:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843961058] [2023-09-01 12:47:37,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:47:37,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:47:37,307 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:47:37,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:47:37,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:47:37,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:47:37,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 81 conjunts are in the unsatisfiable core [2023-09-01 12:47:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:47:38,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:47:38,503 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 234 treesize of output 154 [2023-09-01 12:47:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:38,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:47:43,436 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-09-01 12:47:43,436 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 469 treesize of output 201 [2023-09-01 12:47:44,586 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-09-01 12:47:44,586 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 940 treesize of output 1 [2023-09-01 12:47:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:47:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843961058] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:47:45,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:47:45,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 34 [2023-09-01 12:47:45,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086111491] [2023-09-01 12:47:45,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:47:45,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 12:47:45,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:47:45,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 12:47:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 12:47:52,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 759 [2023-09-01 12:47:52,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 702 transitions, 12130 flow. Second operand has 35 states, 35 states have (on average 267.62857142857143) internal successors, (9367), 35 states have internal predecessors, (9367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:52,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:47:52,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 759 [2023-09-01 12:47:52,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:48:16,511 INFO L130 PetriNetUnfolder]: 1761/3059 cut-off events. [2023-09-01 12:48:16,511 INFO L131 PetriNetUnfolder]: For 25066/25066 co-relation queries the response was YES. [2023-09-01 12:48:16,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24936 conditions, 3059 events. 1761/3059 cut-off events. For 25066/25066 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18126 event pairs, 24 based on Foata normal form. 84/3143 useless extension candidates. Maximal degree in co-relation 24873. Up to 949 conditions per place. [2023-09-01 12:48:16,531 INFO L137 encePairwiseOnDemand]: 749/759 looper letters, 298 selfloop transitions, 739 changer transitions 36/1073 dead transitions. [2023-09-01 12:48:16,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1073 transitions, 18264 flow [2023-09-01 12:48:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-09-01 12:48:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-09-01 12:48:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 24684 transitions. [2023-09-01 12:48:16,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573817486860965 [2023-09-01 12:48:16,551 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 24684 transitions. [2023-09-01 12:48:16,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 24684 transitions. [2023-09-01 12:48:16,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:48:16,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 24684 transitions. [2023-09-01 12:48:16,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 271.25274725274727) internal successors, (24684), 91 states have internal predecessors, (24684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:16,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 759.0) internal successors, (69828), 92 states have internal predecessors, (69828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:16,619 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 759.0) internal successors, (69828), 92 states have internal predecessors, (69828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:16,619 INFO L175 Difference]: Start difference. First operand has 258 places, 702 transitions, 12130 flow. Second operand 91 states and 24684 transitions. [2023-09-01 12:48:16,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1073 transitions, 18264 flow [2023-09-01 12:48:16,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1073 transitions, 16236 flow, removed 770 selfloop flow, removed 24 redundant places. [2023-09-01 12:48:16,931 INFO L231 Difference]: Finished difference. Result has 330 places, 853 transitions, 15347 flow [2023-09-01 12:48:16,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=9109, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=15347, PETRI_PLACES=330, PETRI_TRANSITIONS=853} [2023-09-01 12:48:16,931 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-09-01 12:48:16,931 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 853 transitions, 15347 flow [2023-09-01 12:48:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 267.62857142857143) internal successors, (9367), 35 states have internal predecessors, (9367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:16,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:48:16,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:48:16,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 12:48:17,133 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 12:48:17,133 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 12:48:17,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:48:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1040887714, now seen corresponding path program 15 times [2023-09-01 12:48:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:48:17,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987112544] [2023-09-01 12:48:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:48:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:48:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:48:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:48:19,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:48:19,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987112544] [2023-09-01 12:48:19,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987112544] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:48:19,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708851473] [2023-09-01 12:48:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:48:19,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:48:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:48:19,174 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:48:19,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:48:19,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:48:19,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:48:19,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 12:48:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:48:19,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:48:19,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:48:19,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:48:20,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:48:20,372 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 295 treesize of output 191 [2023-09-01 12:48:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:48:20,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:48:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:48:31,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708851473] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:48:31,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:48:31,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 35 [2023-09-01 12:48:31,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306351565] [2023-09-01 12:48:31,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:48:31,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 12:48:31,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:48:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 12:48:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1029, Unknown=5, NotChecked=0, Total=1260 [2023-09-01 12:48:35,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 759 [2023-09-01 12:48:35,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 853 transitions, 15347 flow. Second operand has 36 states, 36 states have (on average 232.52777777777777) internal successors, (8371), 36 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:35,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:48:35,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 759 [2023-09-01 12:48:35,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:48,766 INFO L130 PetriNetUnfolder]: 2006/3504 cut-off events. [2023-09-01 12:49:48,766 INFO L131 PetriNetUnfolder]: For 26273/26273 co-relation queries the response was YES. [2023-09-01 12:49:48,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29396 conditions, 3504 events. 2006/3504 cut-off events. For 26273/26273 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20400 event pairs, 25 based on Foata normal form. 10/3514 useless extension candidates. Maximal degree in co-relation 29327. Up to 1091 conditions per place. [2023-09-01 12:49:48,791 INFO L137 encePairwiseOnDemand]: 748/759 looper letters, 253 selfloop transitions, 924 changer transitions 26/1203 dead transitions. [2023-09-01 12:49:48,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1203 transitions, 22074 flow [2023-09-01 12:49:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-09-01 12:49:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-09-01 12:49:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 20028 transitions. [2023-09-01 12:49:48,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31043943269007207 [2023-09-01 12:49:48,803 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 20028 transitions. [2023-09-01 12:49:48,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 20028 transitions. [2023-09-01 12:49:48,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:48,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 20028 transitions. [2023-09-01 12:49:48,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 235.6235294117647) internal successors, (20028), 85 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:48,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 759.0) internal successors, (65274), 86 states have internal predecessors, (65274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:48,863 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 759.0) internal successors, (65274), 86 states have internal predecessors, (65274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:48,864 INFO L175 Difference]: Start difference. First operand has 330 places, 853 transitions, 15347 flow. Second operand 85 states and 20028 transitions. [2023-09-01 12:49:48,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1203 transitions, 22074 flow [2023-09-01 12:49:49,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1203 transitions, 20766 flow, removed 424 selfloop flow, removed 33 redundant places. [2023-09-01 12:49:49,387 INFO L231 Difference]: Finished difference. Result has 393 places, 1039 transitions, 20412 flow [2023-09-01 12:49:49,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=759, PETRI_DIFFERENCE_MINUEND_FLOW=13815, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=20412, PETRI_PLACES=393, PETRI_TRANSITIONS=1039} [2023-09-01 12:49:49,387 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2023-09-01 12:49:49,387 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1039 transitions, 20412 flow [2023-09-01 12:49:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 232.52777777777777) internal successors, (8371), 36 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:49,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:49,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:49,393 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 12:49:49,589 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 12:49:49,589 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 12:49:49,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash 220455428, now seen corresponding path program 16 times [2023-09-01 12:49:49,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:49,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575570917] [2023-09-01 12:49:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:49,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575570917] [2023-09-01 12:49:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575570917] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448834807] [2023-09-01 12:49:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:49:51,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:51,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:49:51,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:49:51,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:49:51,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:49:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 12:49:51,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:51,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 12 [2023-09-01 12:49:51,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-09-01 12:49:51,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 12:49:51,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:49:51,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:49:52,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:49:52,252 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 350 treesize of output 202 [2023-09-01 12:49:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:49:52,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:50:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:50:07,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448834807] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:50:07,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:50:07,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-09-01 12:50:07,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617889256] [2023-09-01 12:50:07,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:50:07,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 12:50:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:50:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 12:50:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=870, Unknown=4, NotChecked=0, Total=1056 [2023-09-01 12:50:18,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 759 [2023-09-01 12:50:18,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1039 transitions, 20412 flow. Second operand has 33 states, 33 states have (on average 232.6060606060606) internal successors, (7676), 33 states have internal predecessors, (7676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:18,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:50:18,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 759 [2023-09-01 12:50:18,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:50:24,758 WARN L222 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 323 DAG size of output: 308 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:50:32,173 WARN L222 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 295 DAG size of output: 278 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:50:54,426 WARN L222 SmtUtils]: Spent 12.65s on a formula simplification. DAG size of input: 309 DAG size of output: 294 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:51:13,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-09-01 12:51:13,848 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-09-01 12:51:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 12:51:13,853 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 12:51:14,049 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 12:51:14,050 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfoldingHelper(PetriNetUnfolder.java:209) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:129) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 59 more [2023-09-01 12:51:14,053 INFO L158 Benchmark]: Toolchain (without parser) took 502311.98ms. Allocated memory was 65.0MB in the beginning and 1.4GB in the end (delta: 1.4GB). Free memory was 43.1MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 919.0MB. Max. memory is 16.1GB. [2023-09-01 12:51:14,053 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 12:51:14,054 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.16ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 31.1MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 12:51:14,054 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.99ms. Allocated memory is still 65.0MB. Free memory was 30.8MB in the beginning and 44.1MB in the end (delta: -13.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-09-01 12:51:14,054 INFO L158 Benchmark]: Boogie Preprocessor took 28.06ms. Allocated memory is still 65.0MB. Free memory was 44.1MB in the beginning and 42.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 12:51:14,054 INFO L158 Benchmark]: RCFGBuilder took 687.41ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 42.0MB in the beginning and 48.3MB in the end (delta: -6.3MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2023-09-01 12:51:14,054 INFO L158 Benchmark]: TraceAbstraction took 501350.60ms. Allocated memory was 79.7MB in the beginning and 1.4GB in the end (delta: 1.4GB). Free memory was 47.7MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 907.6MB. Max. memory is 16.1GB. [2023-09-01 12:51:14,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.6MB in the beginning and 28.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.16ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 31.1MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.99ms. Allocated memory is still 65.0MB. Free memory was 30.8MB in the beginning and 44.1MB in the end (delta: -13.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.06ms. Allocated memory is still 65.0MB. Free memory was 44.1MB in the beginning and 42.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 687.41ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 42.0MB in the beginning and 48.3MB in the end (delta: -6.3MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * TraceAbstraction took 501350.60ms. Allocated memory was 79.7MB in the beginning and 1.4GB in the end (delta: 1.4GB). Free memory was 47.7MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 907.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.8s, 315 PlacesBefore, 20 PlacesAfterwards, 336 TransitionsBefore, 17 TransitionsAfterwards, 25652 CoEnabledTransitionPairs, 8 FixpointIterations, 100 TrivialSequentialCompositions, 198 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 75 ConcurrentYvCompositions, 24 ChoiceCompositions, 413 TotalNumberOfCompositions, 22140 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21832, independent: 21808, independent conditional: 0, independent unconditional: 21808, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 15314, independent: 15300, independent conditional: 0, independent unconditional: 15300, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 21832, independent: 6508, independent conditional: 0, independent unconditional: 6508, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 15314, unknown conditional: 0, unknown unconditional: 15314] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/parallel-misc-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --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 12:51:15,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:51:15,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:51:15,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:51:15,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:51:15,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:51:15,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:51:15,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:51:15,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:51:15,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:51:15,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:51:15,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:51:15,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:51:15,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:51:15,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:51:15,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:51:15,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:51:15,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:51:15,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:51:15,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:51:15,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:51:15,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:51:15,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:51:15,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:51:15,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:51:15,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:51:15,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:51:15,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:51:15,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:51:15,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:51:15,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:51:15,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:51:15,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:51:15,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:51:15,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:51:15,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:51:15,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:51:15,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:51:15,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:51:15,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:51:15,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:51:15,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-09-01 12:51:15,856 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:51:15,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:51:15,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:51:15,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:51:15,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:51:15,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:51:15,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:51:15,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:51:15,859 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:51:15,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:51:15,859 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:51:15,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:51:15,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:51:15,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:51:15,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:51:15,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:51:15,860 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 12:51:15,860 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 12:51:15,861 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 12:51:15,861 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:51:15,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:51:15,861 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:51:15,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:51:15,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:51:15,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:51:15,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:51:15,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:51:15,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:51:15,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:51:15,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:51:15,863 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 12:51:15,863 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 12:51:15,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:51:15,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:51:15,864 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:51:15,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:51:15,864 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 12:51:15,864 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:51:15,864 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:51:16,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:51:16,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:51:16,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:51:16,169 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:51:16,170 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:51:16,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-09-01 12:51:17,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:51:17,414 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:51:17,414 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2023-09-01 12:51:17,420 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6672af1f9/fc6b38eb3e2e40589b526b6e95638d6b/FLAG0c6e813ba [2023-09-01 12:51:17,434 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6672af1f9/fc6b38eb3e2e40589b526b6e95638d6b [2023-09-01 12:51:17,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:51:17,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:51:17,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:51:17,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:51:17,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:51:17,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d80f160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17, skipping insertion in model container [2023-09-01 12:51:17,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:51:17,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:51:17,613 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/parallel-misc-1.wvr.c[2755,2768] [2023-09-01 12:51:17,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:51:17,633 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 12:51:17,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:51:17,648 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/parallel-misc-1.wvr.c[2755,2768] [2023-09-01 12:51:17,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:51:17,660 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:51:17,689 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/parallel-misc-1.wvr.c[2755,2768] [2023-09-01 12:51:17,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:51:17,712 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:51:17,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17 WrapperNode [2023-09-01 12:51:17,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:51:17,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:51:17,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:51:17,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:51:17,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,786 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 269 [2023-09-01 12:51:17,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:51:17,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:51:17,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:51:17,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:51:17,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:51:17,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:51:17,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:51:17,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:51:17,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (1/1) ... [2023-09-01 12:51:17,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:51:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:51:17,882 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 12:51:17,907 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 12:51:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:51:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:51:17,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:51:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:51:17,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:51:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 12:51:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:51:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:51:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 12:51:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:51:17,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:51:17,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:51:17,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 12:51:17,926 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 12:51:18,095 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:51:18,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:51:18,491 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:51:18,502 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:51:18,502 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 12:51:18,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:51:18 BoogieIcfgContainer [2023-09-01 12:51:18,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:51:18,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:51:18,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:51:18,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:51:18,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:51:17" (1/3) ... [2023-09-01 12:51:18,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60971353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:51:18, skipping insertion in model container [2023-09-01 12:51:18,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:51:17" (2/3) ... [2023-09-01 12:51:18,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60971353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:51:18, skipping insertion in model container [2023-09-01 12:51:18,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:51:18" (3/3) ... [2023-09-01 12:51:18,517 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-09-01 12:51:18,523 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:51:18,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:51:18,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:51:18,531 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:51:18,703 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:51:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 328 transitions, 672 flow [2023-09-01 12:51:18,851 INFO L130 PetriNetUnfolder]: 28/326 cut-off events. [2023-09-01 12:51:18,851 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:51:18,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 326 events. 28/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 743 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 215. Up to 2 conditions per place. [2023-09-01 12:51:18,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 328 transitions, 672 flow [2023-09-01 12:51:18,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 318 transitions, 648 flow [2023-09-01 12:51:18,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:51:18,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 318 transitions, 648 flow [2023-09-01 12:51:18,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 318 transitions, 648 flow [2023-09-01 12:51:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 318 transitions, 648 flow [2023-09-01 12:51:18,974 INFO L130 PetriNetUnfolder]: 28/318 cut-off events. [2023-09-01 12:51:18,975 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:51:18,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 318 events. 28/318 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 740 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 215. Up to 2 conditions per place. [2023-09-01 12:51:19,000 INFO L119 LiptonReduction]: Number of co-enabled transitions 23868 [2023-09-01 12:51:37,366 INFO L134 LiptonReduction]: Checked pairs total: 20573 [2023-09-01 12:51:37,369 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-09-01 12:51:37,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:51:37,396 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;@6bf69231, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:51:37,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:51:37,406 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-09-01 12:51:37,406 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:51:37,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:37,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:37,408 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 12:51:37,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1111339902, now seen corresponding path program 1 times [2023-09-01 12:51:37,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:51:37,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116688505] [2023-09-01 12:51:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:37,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:51:37,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:51:37,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-09-01 12:51:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:51:37,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:37,900 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 12:51:37,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:51:37,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:51:37,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116688505] [2023-09-01 12:51:37,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116688505] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:51:37,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:51:37,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:51:37,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863637677] [2023-09-01 12:51:37,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:51:37,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:51:37,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:51:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:51:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:51:38,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 722 [2023-09-01 12:51:38,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 288.4) internal successors, (1442), 5 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:38,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:38,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 722 [2023-09-01 12:51:38,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:38,309 INFO L130 PetriNetUnfolder]: 99/168 cut-off events. [2023-09-01 12:51:38,309 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 12:51:38,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 99/168 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 472 event pairs, 15 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 294. Up to 91 conditions per place. [2023-09-01 12:51:38,312 INFO L137 encePairwiseOnDemand]: 716/722 looper letters, 32 selfloop transitions, 10 changer transitions 1/43 dead transitions. [2023-09-01 12:51:38,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 43 transitions, 199 flow [2023-09-01 12:51:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:51:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:51:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1474 transitions. [2023-09-01 12:51:38,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083102493074792 [2023-09-01 12:51:38,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1474 transitions. [2023-09-01 12:51:38,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1474 transitions. [2023-09-01 12:51:38,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:38,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1474 transitions. [2023-09-01 12:51:38,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:38,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 722.0) internal successors, (4332), 6 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:38,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 722.0) internal successors, (4332), 6 states have internal predecessors, (4332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:38,363 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 5 states and 1474 transitions. [2023-09-01 12:51:38,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 43 transitions, 199 flow [2023-09-01 12:51:38,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:51:38,374 INFO L231 Difference]: Finished difference. Result has 23 places, 25 transitions, 99 flow [2023-09-01 12:51:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=25} [2023-09-01 12:51:38,379 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-09-01 12:51:38,380 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 25 transitions, 99 flow [2023-09-01 12:51:38,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 288.4) internal successors, (1442), 5 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:38,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:38,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:38,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:51:38,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:38,593 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 12:51:38,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1106878650, now seen corresponding path program 1 times [2023-09-01 12:51:38,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:51:38,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970598044] [2023-09-01 12:51:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:38,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:51:38,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:51:38,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-09-01 12:51:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:38,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:51:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:38,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:51:38,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:51:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970598044] [2023-09-01 12:51:38,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970598044] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:51:38,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:51:38,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:51:38,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960136813] [2023-09-01 12:51:38,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:51:38,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:51:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:51:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:51:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:51:38,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 722 [2023-09-01 12:51:38,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 25 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:38,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:38,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 722 [2023-09-01 12:51:38,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:39,190 INFO L130 PetriNetUnfolder]: 96/175 cut-off events. [2023-09-01 12:51:39,190 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2023-09-01 12:51:39,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 175 events. 96/175 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 524 event pairs, 9 based on Foata normal form. 6/169 useless extension candidates. Maximal degree in co-relation 206. Up to 115 conditions per place. [2023-09-01 12:51:39,191 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 36 selfloop transitions, 6 changer transitions 8/50 dead transitions. [2023-09-01 12:51:39,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 283 flow [2023-09-01 12:51:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:51:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:51:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1783 transitions. [2023-09-01 12:51:39,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115881809787627 [2023-09-01 12:51:39,196 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1783 transitions. [2023-09-01 12:51:39,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1783 transitions. [2023-09-01 12:51:39,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:39,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1783 transitions. [2023-09-01 12:51:39,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.1666666666667) internal successors, (1783), 6 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:39,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:39,209 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:39,209 INFO L175 Difference]: Start difference. First operand has 23 places, 25 transitions, 99 flow. Second operand 6 states and 1783 transitions. [2023-09-01 12:51:39,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 283 flow [2023-09-01 12:51:39,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 50 transitions, 281 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 12:51:39,212 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 133 flow [2023-09-01 12:51:39,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-09-01 12:51:39,213 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 10 predicate places. [2023-09-01 12:51:39,213 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 133 flow [2023-09-01 12:51:39,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:39,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:39,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:39,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:51:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:39,424 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 12:51:39,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash -409199040, now seen corresponding path program 2 times [2023-09-01 12:51:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:51:39,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383350471] [2023-09-01 12:51:39,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:51:39,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:51:39,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:51:39,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-09-01 12:51:39,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:51:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:51:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:51:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:39,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:51:39,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:51:39,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383350471] [2023-09-01 12:51:39,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383350471] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:51:39,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:51:39,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:51:39,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035848651] [2023-09-01 12:51:39,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:51:39,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:51:39,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:51:39,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:51:39,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:51:39,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 722 [2023-09-01 12:51:39,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:39,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:39,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 722 [2023-09-01 12:51:39,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:39,997 INFO L130 PetriNetUnfolder]: 82/143 cut-off events. [2023-09-01 12:51:39,998 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-09-01 12:51:39,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 143 events. 82/143 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 380 event pairs, 8 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 265. Up to 90 conditions per place. [2023-09-01 12:51:39,999 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 30 selfloop transitions, 8 changer transitions 5/43 dead transitions. [2023-09-01 12:51:39,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 273 flow [2023-09-01 12:51:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:51:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:51:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1778 transitions. [2023-09-01 12:51:40,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41043397968605727 [2023-09-01 12:51:40,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1778 transitions. [2023-09-01 12:51:40,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1778 transitions. [2023-09-01 12:51:40,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:40,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1778 transitions. [2023-09-01 12:51:40,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 296.3333333333333) internal successors, (1778), 6 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,023 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 722.0) internal successors, (5054), 7 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,023 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 133 flow. Second operand 6 states and 1778 transitions. [2023-09-01 12:51:40,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 273 flow [2023-09-01 12:51:40,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 259 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 12:51:40,026 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 150 flow [2023-09-01 12:51:40,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-09-01 12:51:40,026 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2023-09-01 12:51:40,027 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 150 flow [2023-09-01 12:51:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:40,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:40,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-09-01 12:51:40,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:40,238 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 12:51:40,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:40,239 INFO L85 PathProgramCache]: Analyzing trace with hash -290858005, now seen corresponding path program 1 times [2023-09-01 12:51:40,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:51:40,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155088278] [2023-09-01 12:51:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:40,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:51:40,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:51:40,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-09-01 12:51:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:51:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:40,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:51:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:40,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:51:40,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155088278] [2023-09-01 12:51:40,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155088278] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:51:40,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:51:40,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-09-01 12:51:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667731526] [2023-09-01 12:51:40,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:51:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:51:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:51:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:51:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:51:40,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 722 [2023-09-01 12:51:40,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:40,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 722 [2023-09-01 12:51:40,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:40,834 INFO L130 PetriNetUnfolder]: 105/181 cut-off events. [2023-09-01 12:51:40,835 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-09-01 12:51:40,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 181 events. 105/181 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 499 event pairs, 2 based on Foata normal form. 8/185 useless extension candidates. Maximal degree in co-relation 327. Up to 107 conditions per place. [2023-09-01 12:51:40,836 INFO L137 encePairwiseOnDemand]: 717/722 looper letters, 38 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2023-09-01 12:51:40,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 321 flow [2023-09-01 12:51:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:51:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:51:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1186 transitions. [2023-09-01 12:51:40,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41066481994459836 [2023-09-01 12:51:40,840 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1186 transitions. [2023-09-01 12:51:40,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1186 transitions. [2023-09-01 12:51:40,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:40,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1186 transitions. [2023-09-01 12:51:40,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,851 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,851 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 150 flow. Second operand 4 states and 1186 transitions. [2023-09-01 12:51:40,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 321 flow [2023-09-01 12:51:40,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 297 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-09-01 12:51:40,856 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 198 flow [2023-09-01 12:51:40,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-09-01 12:51:40,858 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-09-01 12:51:40,858 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 198 flow [2023-09-01 12:51:40,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 291.5) internal successors, (1166), 4 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:40,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:40,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:40,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:51:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:41,071 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 12:51:41,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1548239333, now seen corresponding path program 1 times [2023-09-01 12:51:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:51:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557802799] [2023-09-01 12:51:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:41,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:41,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:51:41,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:51:41,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-09-01 12:51:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:51:41,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:51:41,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:51:41,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:51:41,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557802799] [2023-09-01 12:51:41,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557802799] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:51:41,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:51:41,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:51:41,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786660341] [2023-09-01 12:51:41,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:51:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:51:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:51:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:51:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:51:41,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 722 [2023-09-01 12:51:41,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 295.75) internal successors, (1183), 4 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:41,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:41,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 722 [2023-09-01 12:51:41,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:41,578 INFO L130 PetriNetUnfolder]: 112/200 cut-off events. [2023-09-01 12:51:41,578 INFO L131 PetriNetUnfolder]: For 374/374 co-relation queries the response was YES. [2023-09-01 12:51:41,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 200 events. 112/200 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 545 event pairs, 49 based on Foata normal form. 10/206 useless extension candidates. Maximal degree in co-relation 374. Up to 182 conditions per place. [2023-09-01 12:51:41,580 INFO L137 encePairwiseOnDemand]: 718/722 looper letters, 32 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-09-01 12:51:41,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 343 flow [2023-09-01 12:51:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:51:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:51:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1193 transitions. [2023-09-01 12:51:41,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130886426592798 [2023-09-01 12:51:41,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1193 transitions. [2023-09-01 12:51:41,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1193 transitions. [2023-09-01 12:51:41,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:41,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1193 transitions. [2023-09-01 12:51:41,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.25) internal successors, (1193), 4 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:41,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:41,591 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 722.0) internal successors, (3610), 5 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:41,591 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 198 flow. Second operand 4 states and 1193 transitions. [2023-09-01 12:51:41,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 343 flow [2023-09-01 12:51:41,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 12:51:41,595 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 214 flow [2023-09-01 12:51:41,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-09-01 12:51:41,595 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-09-01 12:51:41,596 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 214 flow [2023-09-01 12:51:41,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 295.75) internal successors, (1183), 4 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:41,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:41,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:41,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:51:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:41,807 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 12:51:41,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 909737418, now seen corresponding path program 1 times [2023-09-01 12:51:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:51:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282451312] [2023-09-01 12:51:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:41,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:51:41,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:51:41,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:51:41,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-09-01 12:51:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 12:51:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:42,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:51:42,603 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 241 treesize of output 131 [2023-09-01 12:51:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:51:42,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:51:46,800 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 12:51:46,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 70 [2023-09-01 12:51:47,517 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 12:51:47,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 81 [2023-09-01 12:51:48,776 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 12:51:48,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 397 treesize of output 165 [2023-09-01 12:52:56,067 WARN L222 SmtUtils]: Spent 54.48s on a formula simplification. DAG size of input: 526 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:52:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:52:56,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:52:56,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282451312] [2023-09-01 12:52:56,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282451312] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:52:56,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:52:56,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-09-01 12:52:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292035775] [2023-09-01 12:52:56,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 12:52:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:52:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:52:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:52:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=117, Unknown=2, NotChecked=0, Total=156 [2023-09-01 12:52:57,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 722 [2023-09-01 12:52:57,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 214 flow. Second operand has 13 states, 13 states have (on average 249.30769230769232) internal successors, (3241), 13 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:57,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:52:57,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 722 [2023-09-01 12:52:57,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:53:00,552 INFO L130 PetriNetUnfolder]: 137/239 cut-off events. [2023-09-01 12:53:00,553 INFO L131 PetriNetUnfolder]: For 457/457 co-relation queries the response was YES. [2023-09-01 12:53:00,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 239 events. 137/239 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 732 event pairs, 11 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 959. Up to 164 conditions per place. [2023-09-01 12:53:00,555 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 43 selfloop transitions, 21 changer transitions 4/68 dead transitions. [2023-09-01 12:53:00,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 499 flow [2023-09-01 12:53:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:53:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:53:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2032 transitions. [2023-09-01 12:53:00,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518005540166205 [2023-09-01 12:53:00,561 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2032 transitions. [2023-09-01 12:53:00,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2032 transitions. [2023-09-01 12:53:00,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:53:00,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2032 transitions. [2023-09-01 12:53:00,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:00,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:00,573 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:00,574 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 214 flow. Second operand 8 states and 2032 transitions. [2023-09-01 12:53:00,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 499 flow [2023-09-01 12:53:00,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 68 transitions, 485 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 12:53:00,577 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 366 flow [2023-09-01 12:53:00,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=366, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-09-01 12:53:00,578 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-09-01 12:53:00,578 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 366 flow [2023-09-01 12:53:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 249.30769230769232) internal successors, (3241), 13 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:00,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:53:00,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:53:00,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:53:00,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:53:00,790 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 12:53:00,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:53:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -804462780, now seen corresponding path program 2 times [2023-09-01 12:53:00,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:53:00,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561793831] [2023-09-01 12:53:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:53:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:53:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:53:00,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:53:00,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-09-01 12:53:01,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:53:01,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:53:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 12:53:01,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:53:02,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:53:02,141 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 241 treesize of output 131 [2023-09-01 12:53:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:53:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:53:07,353 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 12:53:07,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 455 treesize of output 328 [2023-09-01 12:53:45,740 WARN L222 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 561 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:53:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:53:45,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:53:45,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561793831] [2023-09-01 12:53:45,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561793831] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:53:45,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:53:45,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-09-01 12:53:45,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450947269] [2023-09-01 12:53:45,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 12:53:45,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:53:45,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:53:45,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:53:45,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=92, Unknown=1, NotChecked=0, Total=132 [2023-09-01 12:53:48,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:53:50,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:53:52,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:53:54,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:53:56,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:53:58,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:00,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:02,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:05,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:07,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:09,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:11,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:13,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:15,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:17,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:19,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:21,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:23,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:26,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:28,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:30,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:32,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:34,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:36,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:38,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:40,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:54:40,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 722 [2023-09-01 12:54:40,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 366 flow. Second operand has 12 states, 12 states have (on average 249.5) internal successors, (2994), 12 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:40,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:54:40,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 722 [2023-09-01 12:54:40,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:54:43,587 INFO L130 PetriNetUnfolder]: 152/262 cut-off events. [2023-09-01 12:54:43,587 INFO L131 PetriNetUnfolder]: For 883/883 co-relation queries the response was YES. [2023-09-01 12:54:43,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 262 events. 152/262 cut-off events. For 883/883 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 819 event pairs, 11 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 1233. Up to 193 conditions per place. [2023-09-01 12:54:43,589 INFO L137 encePairwiseOnDemand]: 715/722 looper letters, 44 selfloop transitions, 23 changer transitions 4/71 dead transitions. [2023-09-01 12:54:43,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 630 flow [2023-09-01 12:54:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:54:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:54:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2032 transitions. [2023-09-01 12:54:43,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518005540166205 [2023-09-01 12:54:43,596 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2032 transitions. [2023-09-01 12:54:43,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2032 transitions. [2023-09-01 12:54:43,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:54:43,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2032 transitions. [2023-09-01 12:54:43,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:43,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:43,608 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 722.0) internal successors, (6498), 9 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:43,609 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 366 flow. Second operand 8 states and 2032 transitions. [2023-09-01 12:54:43,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 630 flow [2023-09-01 12:54:43,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 580 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-09-01 12:54:43,613 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 434 flow [2023-09-01 12:54:43,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=722, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=434, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-09-01 12:54:43,614 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-09-01 12:54:43,614 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 434 flow [2023-09-01 12:54:43,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 249.5) internal successors, (2994), 12 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:43,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:54:43,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:54:43,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:54:43,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:54:43,826 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 12:54:43,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:54:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -887579670, now seen corresponding path program 3 times [2023-09-01 12:54:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 12:54:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369172854] [2023-09-01 12:54:43,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:54:43,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-09-01 12:54:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 12:54:43,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-09-01 12:54:43,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-09-01 12:54:44,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:54:44,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:54:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 12:54:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:54:45,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:54:45,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 131 [2023-09-01 12:54:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:54:46,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:54:50,861 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-09-01 12:54:50,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 455 treesize of output 328 [2023-09-01 12:55:37,022 WARN L222 SmtUtils]: Spent 13.44s on a formula simplification. DAG size of input: 563 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:55:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:55:37,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 12:55:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369172854] [2023-09-01 12:55:37,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369172854] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:55:37,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:55:37,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-09-01 12:55:37,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878970768] [2023-09-01 12:55:37,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 12:55:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:55:37,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 12:55:37,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:55:37,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2023-09-01 12:55:39,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:55:41,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:55:43,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:55:46,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:55:48,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 12:55:51,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] Killed by 15