./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:06:26,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:06:26,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:06:27,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:06:27,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:06:27,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:06:27,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:06:27,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:06:27,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:06:27,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:06:27,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:06:27,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:06:27,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:06:27,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:06:27,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:06:27,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:06:27,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:06:27,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:06:27,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:06:27,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:06:27,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:06:27,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:06:27,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:06:27,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:06:27,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:06:27,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:06:27,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:06:27,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:06:27,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:06:27,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:06:27,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:06:27,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:06:27,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:06:27,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:06:27,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:06:27,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:06:27,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:06:27,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:06:27,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:06:27,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:06:27,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:06:27,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:06:27,125 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:06:27,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:06:27,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:06:27,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:06:27,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:06:27,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:06:27,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:06:27,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:06:27,129 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:06:27,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:06:27,129 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:06:27,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:06:27,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:06:27,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:06:27,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:06:27,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:06:27,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:06:27,131 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:06:27,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:06:27,131 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:06:27,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:06:27,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:06:27,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:06:27,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:06:27,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:06:27,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:06:27,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:06:27,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:06:27,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:06:27,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:06:27,133 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:06:27,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:06:27,134 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:06:27,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:06:27,134 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:06:27,134 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:06:27,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:06:27,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:06:27,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:06:27,487 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:06:27,488 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:06:27,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-31 04:06:28,581 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:06:28,775 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:06:28,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2023-08-31 04:06:28,781 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6fc99c57/b2016a19226b4435bd0dd3d0416813a9/FLAG16328dc09 [2023-08-31 04:06:28,793 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6fc99c57/b2016a19226b4435bd0dd3d0416813a9 [2023-08-31 04:06:28,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:06:28,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:06:28,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:06:28,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:06:28,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:06:28,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:06:28" (1/1) ... [2023-08-31 04:06:28,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9198007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:28, skipping insertion in model container [2023-08-31 04:06:28,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:06:28" (1/1) ... [2023-08-31 04:06:28,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:06:28,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:06:29,012 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-31 04:06:29,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:06:29,037 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:06:29,071 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2023-08-31 04:06:29,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:06:29,093 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:06:29,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29 WrapperNode [2023-08-31 04:06:29,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:06:29,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:06:29,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:06:29,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:06:29,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,148 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2023-08-31 04:06:29,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:06:29,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:06:29,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:06:29,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:06:29,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,192 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:06:29,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:06:29,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:06:29,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:06:29,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (1/1) ... [2023-08-31 04:06:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:06:29,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:29,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 04:06:29,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 04:06:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:06:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:06:29,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:06:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:06:29,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:06:29,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:06:29,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:06:29,309 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:06:29,437 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:06:29,439 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:06:29,679 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:06:29,689 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:06:29,689 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:06:29,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:06:29 BoogieIcfgContainer [2023-08-31 04:06:29,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:06:29,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:06:29,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:06:29,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:06:29,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:06:28" (1/3) ... [2023-08-31 04:06:29,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26717299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:06:29, skipping insertion in model container [2023-08-31 04:06:29,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:06:29" (2/3) ... [2023-08-31 04:06:29,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26717299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:06:29, skipping insertion in model container [2023-08-31 04:06:29,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:06:29" (3/3) ... [2023-08-31 04:06:29,698 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-08-31 04:06:29,705 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:06:29,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:06:29,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:06:29,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:06:29,842 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:06:29,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 157 transitions, 330 flow [2023-08-31 04:06:29,931 INFO L130 PetriNetUnfolder]: 14/155 cut-off events. [2023-08-31 04:06:29,931 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:06:29,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 14/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-31 04:06:29,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 157 transitions, 330 flow [2023-08-31 04:06:29,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 147 transitions, 306 flow [2023-08-31 04:06:29,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:06:29,953 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 147 transitions, 306 flow [2023-08-31 04:06:29,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 147 transitions, 306 flow [2023-08-31 04:06:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 147 transitions, 306 flow [2023-08-31 04:06:29,993 INFO L130 PetriNetUnfolder]: 14/147 cut-off events. [2023-08-31 04:06:29,993 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:06:29,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 14/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 141 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-31 04:06:29,996 INFO L119 LiptonReduction]: Number of co-enabled transitions 1942 [2023-08-31 04:06:34,289 INFO L134 LiptonReduction]: Checked pairs total: 1977 [2023-08-31 04:06:34,290 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-31 04:06:34,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:06:34,307 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;@10c3969a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:06:34,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:06:34,312 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 04:06:34,312 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:06:34,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:34,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:34,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:34,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1597977991, now seen corresponding path program 1 times [2023-08-31 04:06:34,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:34,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124144575] [2023-08-31 04:06:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:34,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:34,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:34,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124144575] [2023-08-31 04:06:34,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124144575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:06:34,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:06:34,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:06:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783259222] [2023-08-31 04:06:34,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:06:34,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:06:34,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:06:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:06:34,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 330 [2023-08-31 04:06:34,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:34,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:34,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 330 [2023-08-31 04:06:34,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:34,768 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-08-31 04:06:34,768 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:06:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 178 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-31 04:06:34,770 INFO L137 encePairwiseOnDemand]: 327/330 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 04:06:34,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-31 04:06:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:06:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:06:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-31 04:06:34,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43232323232323233 [2023-08-31 04:06:34,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-31 04:06:34,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-31 04:06:34,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:34,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-31 04:06:34,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:34,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:34,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:34,813 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 428 transitions. [2023-08-31 04:06:34,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-31 04:06:34,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 04:06:34,816 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 04:06:34,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-31 04:06:34,825 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 04:06:34,825 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 04:06:34,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:34,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:34,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:34,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:06:34,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:34,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1173402768, now seen corresponding path program 1 times [2023-08-31 04:06:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:34,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411500194] [2023-08-31 04:06:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:34,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:34,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:34,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411500194] [2023-08-31 04:06:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411500194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:06:34,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:06:34,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 04:06:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312349893] [2023-08-31 04:06:34,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:06:34,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:06:34,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:06:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:06:34,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 330 [2023-08-31 04:06:35,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:35,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 330 [2023-08-31 04:06:35,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:35,044 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-08-31 04:06:35,044 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:06:35,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 319 event pairs, 9 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-31 04:06:35,045 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-31 04:06:35,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-31 04:06:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:06:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:06:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-31 04:06:35,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383838383838384 [2023-08-31 04:06:35,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-31 04:06:35,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-31 04:06:35,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:35,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-31 04:06:35,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,055 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 434 transitions. [2023-08-31 04:06:35,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-31 04:06:35,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 04:06:35,056 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-31 04:06:35,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-31 04:06:35,057 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-31 04:06:35,057 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-31 04:06:35,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:35,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:35,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:06:35,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:35,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash -592440007, now seen corresponding path program 1 times [2023-08-31 04:06:35,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:35,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005831034] [2023-08-31 04:06:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:35,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:35,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005831034] [2023-08-31 04:06:35,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005831034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:06:35,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:06:35,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:06:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884952375] [2023-08-31 04:06:35,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:06:35,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:06:35,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:06:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:06:35,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 330 [2023-08-31 04:06:35,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:35,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 330 [2023-08-31 04:06:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:35,392 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-08-31 04:06:35,392 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-31 04:06:35,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 563 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-08-31 04:06:35,396 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-08-31 04:06:35,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-08-31 04:06:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:06:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:06:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 696 transitions. [2023-08-31 04:06:35,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218181818181818 [2023-08-31 04:06:35,399 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 696 transitions. [2023-08-31 04:06:35,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 696 transitions. [2023-08-31 04:06:35,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:35,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 696 transitions. [2023-08-31 04:06:35,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,406 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 696 transitions. [2023-08-31 04:06:35,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-08-31 04:06:35,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:06:35,408 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-08-31 04:06:35,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-31 04:06:35,409 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-31 04:06:35,412 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-08-31 04:06:35,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:35,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:35,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:06:35,414 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:35,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1300877915, now seen corresponding path program 1 times [2023-08-31 04:06:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643870296] [2023-08-31 04:06:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:35,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643870296] [2023-08-31 04:06:35,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643870296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623851230] [2023-08-31 04:06:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:35,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:35,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:06:35,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:06:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:06:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:06:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:06:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:35,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623851230] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:35,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 04:06:35,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-31 04:06:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842127750] [2023-08-31 04:06:35,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:06:35,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:06:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:35,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:06:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 04:06:35,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 330 [2023-08-31 04:06:35,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:35,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 330 [2023-08-31 04:06:35,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:35,926 INFO L130 PetriNetUnfolder]: 70/141 cut-off events. [2023-08-31 04:06:35,926 INFO L131 PetriNetUnfolder]: For 94/108 co-relation queries the response was YES. [2023-08-31 04:06:35,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 141 events. 70/141 cut-off events. For 94/108 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 425 event pairs, 15 based on Foata normal form. 20/158 useless extension candidates. Maximal degree in co-relation 413. Up to 88 conditions per place. [2023-08-31 04:06:35,930 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 28 selfloop transitions, 4 changer transitions 4/37 dead transitions. [2023-08-31 04:06:35,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 37 transitions, 215 flow [2023-08-31 04:06:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:06:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:06:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-08-31 04:06:35,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287878787878788 [2023-08-31 04:06:35,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-08-31 04:06:35,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-08-31 04:06:35,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:35,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-08-31 04:06:35,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,937 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 566 transitions. [2023-08-31 04:06:35,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 37 transitions, 215 flow [2023-08-31 04:06:35,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 206 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 04:06:35,940 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 114 flow [2023-08-31 04:06:35,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-31 04:06:35,943 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-08-31 04:06:35,943 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 114 flow [2023-08-31 04:06:35,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:35,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:35,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:35,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 04:06:36,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:36,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:36,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1353157799, now seen corresponding path program 2 times [2023-08-31 04:06:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:36,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606563145] [2023-08-31 04:06:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606563145] [2023-08-31 04:06:36,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606563145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:06:36,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:06:36,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 04:06:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755935221] [2023-08-31 04:06:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:06:36,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:06:36,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:36,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:06:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:06:36,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 330 [2023-08-31 04:06:36,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:36,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:36,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 330 [2023-08-31 04:06:36,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:36,378 INFO L130 PetriNetUnfolder]: 82/167 cut-off events. [2023-08-31 04:06:36,378 INFO L131 PetriNetUnfolder]: For 221/235 co-relation queries the response was YES. [2023-08-31 04:06:36,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 167 events. 82/167 cut-off events. For 221/235 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 571 event pairs, 29 based on Foata normal form. 18/182 useless extension candidates. Maximal degree in co-relation 530. Up to 108 conditions per place. [2023-08-31 04:06:36,380 INFO L137 encePairwiseOnDemand]: 326/330 looper letters, 31 selfloop transitions, 6 changer transitions 2/40 dead transitions. [2023-08-31 04:06:36,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 258 flow [2023-08-31 04:06:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:06:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:06:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-31 04:06:36,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257575757575758 [2023-08-31 04:06:36,382 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-31 04:06:36,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-31 04:06:36,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:36,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-31 04:06:36,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:36,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:36,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:36,387 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 114 flow. Second operand 4 states and 562 transitions. [2023-08-31 04:06:36,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 258 flow [2023-08-31 04:06:36,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 251 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 04:06:36,394 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 147 flow [2023-08-31 04:06:36,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-31 04:06:36,397 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-31 04:06:36,397 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 147 flow [2023-08-31 04:06:36,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:36,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:36,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 04:06:36,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:36,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1429573215, now seen corresponding path program 2 times [2023-08-31 04:06:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:36,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516775737] [2023-08-31 04:06:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:36,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516775737] [2023-08-31 04:06:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516775737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218652615] [2023-08-31 04:06:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:06:36,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:36,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:06:36,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:06:36,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:06:36,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:06:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:06:36,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:06:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:36,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 04:06:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218652615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:06:36,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 04:06:36,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-08-31 04:06:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730612431] [2023-08-31 04:06:36,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:06:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:06:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:06:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-31 04:06:36,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 330 [2023-08-31 04:06:36,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:36,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:36,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 330 [2023-08-31 04:06:36,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:36,995 INFO L130 PetriNetUnfolder]: 99/191 cut-off events. [2023-08-31 04:06:36,995 INFO L131 PetriNetUnfolder]: For 388/388 co-relation queries the response was YES. [2023-08-31 04:06:36,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 191 events. 99/191 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 595 event pairs, 22 based on Foata normal form. 10/200 useless extension candidates. Maximal degree in co-relation 706. Up to 102 conditions per place. [2023-08-31 04:06:36,997 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 32 selfloop transitions, 9 changer transitions 8/49 dead transitions. [2023-08-31 04:06:36,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 336 flow [2023-08-31 04:06:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:06:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:06:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 833 transitions. [2023-08-31 04:06:37,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207070707070707 [2023-08-31 04:06:37,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 833 transitions. [2023-08-31 04:06:37,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 833 transitions. [2023-08-31 04:06:37,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:37,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 833 transitions. [2023-08-31 04:06:37,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.83333333333334) internal successors, (833), 6 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,007 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,007 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 147 flow. Second operand 6 states and 833 transitions. [2023-08-31 04:06:37,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 336 flow [2023-08-31 04:06:37,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 315 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 04:06:37,013 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 173 flow [2023-08-31 04:06:37,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-31 04:06:37,016 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-08-31 04:06:37,016 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 173 flow [2023-08-31 04:06:37,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:37,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:37,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:06:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-31 04:06:37,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:37,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1027272943, now seen corresponding path program 3 times [2023-08-31 04:06:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:37,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115236924] [2023-08-31 04:06:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:37,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:37,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115236924] [2023-08-31 04:06:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115236924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823816021] [2023-08-31 04:06:37,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:06:37,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:37,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:37,357 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:06:37,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:06:37,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:06:37,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:06:37,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:06:37,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:06:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:37,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:06:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:06:37,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823816021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:06:37,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:06:37,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 04:06:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578876819] [2023-08-31 04:06:37,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:06:37,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 04:06:37,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 04:06:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-31 04:06:37,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:06:37,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 173 flow. Second operand has 8 states, 8 states have (on average 132.875) internal successors, (1063), 8 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:37,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:06:37,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:37,761 INFO L130 PetriNetUnfolder]: 111/206 cut-off events. [2023-08-31 04:06:37,761 INFO L131 PetriNetUnfolder]: For 593/593 co-relation queries the response was YES. [2023-08-31 04:06:37,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 206 events. 111/206 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 666 event pairs, 21 based on Foata normal form. 16/221 useless extension candidates. Maximal degree in co-relation 800. Up to 112 conditions per place. [2023-08-31 04:06:37,763 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 37 selfloop transitions, 13 changer transitions 6/56 dead transitions. [2023-08-31 04:06:37,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 448 flow [2023-08-31 04:06:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:06:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:06:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 826 transitions. [2023-08-31 04:06:37,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171717171717172 [2023-08-31 04:06:37,767 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 826 transitions. [2023-08-31 04:06:37,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 826 transitions. [2023-08-31 04:06:37,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:37,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 826 transitions. [2023-08-31 04:06:37,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.66666666666666) internal successors, (826), 6 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,774 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 330.0) internal successors, (2310), 7 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,774 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 173 flow. Second operand 6 states and 826 transitions. [2023-08-31 04:06:37,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 448 flow [2023-08-31 04:06:37,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 401 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-31 04:06:37,778 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 242 flow [2023-08-31 04:06:37,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2023-08-31 04:06:37,779 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-08-31 04:06:37,779 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 242 flow [2023-08-31 04:06:37,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.875) internal successors, (1063), 8 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:37,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:37,780 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:37,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:06:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:37,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:37,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1687337279, now seen corresponding path program 1 times [2023-08-31 04:06:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594789880] [2023-08-31 04:06:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:37,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594789880] [2023-08-31 04:06:38,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594789880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914351938] [2023-08-31 04:06:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:38,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:38,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:06:38,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:06:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:38,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:06:38,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:06:38,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:06:39,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:06:39,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:06:39,182 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:06:39,182 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2023-08-31 04:06:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:39,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:06:39,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:06:39,492 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 166 treesize of output 106 [2023-08-31 04:06:39,565 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-31 04:06:39,565 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 571 [2023-08-31 04:06:39,636 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-31 04:06:39,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 133 [2023-08-31 04:06:39,848 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-31 04:06:39,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 136 [2023-08-31 04:06:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914351938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:06:40,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:06:40,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-31 04:06:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004885208] [2023-08-31 04:06:40,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:06:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 04:06:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 04:06:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=342, Unknown=4, NotChecked=0, Total=462 [2023-08-31 04:06:42,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:06:44,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:06:46,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:06:47,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-08-31 04:06:47,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 242 flow. Second operand has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:47,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:47,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-08-31 04:06:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:48,009 INFO L130 PetriNetUnfolder]: 269/486 cut-off events. [2023-08-31 04:06:48,009 INFO L131 PetriNetUnfolder]: For 1420/1534 co-relation queries the response was YES. [2023-08-31 04:06:48,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 486 events. 269/486 cut-off events. For 1420/1534 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1932 event pairs, 40 based on Foata normal form. 80/555 useless extension candidates. Maximal degree in co-relation 1637. Up to 232 conditions per place. [2023-08-31 04:06:48,013 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 45 selfloop transitions, 23 changer transitions 51/124 dead transitions. [2023-08-31 04:06:48,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 124 transitions, 964 flow [2023-08-31 04:06:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 04:06:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 04:06:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1354 transitions. [2023-08-31 04:06:48,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3156177156177156 [2023-08-31 04:06:48,018 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1354 transitions. [2023-08-31 04:06:48,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1354 transitions. [2023-08-31 04:06:48,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:06:48,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1354 transitions. [2023-08-31 04:06:48,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 104.15384615384616) internal successors, (1354), 13 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:48,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:48,029 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 330.0) internal successors, (4620), 14 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:48,029 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 242 flow. Second operand 13 states and 1354 transitions. [2023-08-31 04:06:48,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 124 transitions, 964 flow [2023-08-31 04:06:48,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 124 transitions, 892 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-31 04:06:48,034 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 407 flow [2023-08-31 04:06:48,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=13, PETRI_FLOW=407, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-31 04:06:48,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2023-08-31 04:06:48,036 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 407 flow [2023-08-31 04:06:48,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:48,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:06:48,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:06:48,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 04:06:48,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:48,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:06:48,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:06:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1247683839, now seen corresponding path program 2 times [2023-08-31 04:06:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:06:48,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247618838] [2023-08-31 04:06:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:06:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:06:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:06:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:49,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:06:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247618838] [2023-08-31 04:06:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247618838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:06:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964766434] [2023-08-31 04:06:49,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:06:49,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:06:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:06:49,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:06:49,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:06:49,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:06:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:06:49,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-31 04:06:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:06:49,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:06:49,383 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 [2023-08-31 04:06:49,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:06:49,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:06:49,577 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:06:49,578 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2023-08-31 04:06:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:49,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:06:49,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:06:49,904 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 163 treesize of output 103 [2023-08-31 04:06:49,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:06:49,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 912 treesize of output 852 [2023-08-31 04:06:50,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:06:50,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 232 [2023-08-31 04:06:50,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:06:50,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 129 [2023-08-31 04:06:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:06:51,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964766434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:06:51,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:06:51,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-31 04:06:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688487535] [2023-08-31 04:06:51,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:06:51,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 04:06:51,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:06:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 04:06:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=377, Unknown=5, NotChecked=0, Total=462 [2023-08-31 04:06:54,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:06:54,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-08-31 04:06:54,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 407 flow. Second operand has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:06:54,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:06:54,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-08-31 04:06:54,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:06:57,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:07:01,845 INFO L130 PetriNetUnfolder]: 257/482 cut-off events. [2023-08-31 04:07:01,845 INFO L131 PetriNetUnfolder]: For 1798/1875 co-relation queries the response was YES. [2023-08-31 04:07:01,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 482 events. 257/482 cut-off events. For 1798/1875 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1892 event pairs, 22 based on Foata normal form. 62/532 useless extension candidates. Maximal degree in co-relation 2096. Up to 211 conditions per place. [2023-08-31 04:07:01,849 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 48 selfloop transitions, 45 changer transitions 23/121 dead transitions. [2023-08-31 04:07:01,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 121 transitions, 1082 flow [2023-08-31 04:07:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 04:07:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 04:07:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1640 transitions. [2023-08-31 04:07:01,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3106060606060606 [2023-08-31 04:07:01,855 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1640 transitions. [2023-08-31 04:07:01,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1640 transitions. [2023-08-31 04:07:01,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:01,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1640 transitions. [2023-08-31 04:07:01,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.5) internal successors, (1640), 16 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:01,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 330.0) internal successors, (5610), 17 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:01,866 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 330.0) internal successors, (5610), 17 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:01,867 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 407 flow. Second operand 16 states and 1640 transitions. [2023-08-31 04:07:01,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 121 transitions, 1082 flow [2023-08-31 04:07:01,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 121 transitions, 1000 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-08-31 04:07:01,875 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 698 flow [2023-08-31 04:07:01,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=698, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-31 04:07:01,876 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2023-08-31 04:07:01,876 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 698 flow [2023-08-31 04:07:01,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.86363636363636) internal successors, (2175), 22 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:01,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:01,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:01,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:02,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:02,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:02,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1973804990, now seen corresponding path program 3 times [2023-08-31 04:07:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:02,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315768066] [2023-08-31 04:07:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:03,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:03,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315768066] [2023-08-31 04:07:03,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315768066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:03,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672940851] [2023-08-31 04:07:03,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:07:03,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:03,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:03,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:07:03,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:07:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 04:07:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:03,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:07:03,366 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:07:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:03,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:03,454 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:07:03,454 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-31 04:07:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672940851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:03,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:03,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 14 [2023-08-31 04:07:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385782993] [2023-08-31 04:07:03,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:07:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:07:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:07:04,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 330 [2023-08-31 04:07:04,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 698 flow. Second operand has 16 states, 16 states have (on average 121.4375) internal successors, (1943), 16 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:04,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:04,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 330 [2023-08-31 04:07:04,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:04,668 INFO L130 PetriNetUnfolder]: 314/576 cut-off events. [2023-08-31 04:07:04,668 INFO L131 PetriNetUnfolder]: For 2583/2672 co-relation queries the response was YES. [2023-08-31 04:07:04,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 576 events. 314/576 cut-off events. For 2583/2672 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2365 event pairs, 66 based on Foata normal form. 78/645 useless extension candidates. Maximal degree in co-relation 2742. Up to 376 conditions per place. [2023-08-31 04:07:04,674 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 80 selfloop transitions, 44 changer transitions 1/130 dead transitions. [2023-08-31 04:07:04,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 1310 flow [2023-08-31 04:07:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:07:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:07:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1749 transitions. [2023-08-31 04:07:04,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2023-08-31 04:07:04,679 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1749 transitions. [2023-08-31 04:07:04,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1749 transitions. [2023-08-31 04:07:04,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:04,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1749 transitions. [2023-08-31 04:07:04,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.92857142857143) internal successors, (1749), 14 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:04,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:04,690 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:04,690 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 698 flow. Second operand 14 states and 1749 transitions. [2023-08-31 04:07:04,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 1310 flow [2023-08-31 04:07:04,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 130 transitions, 1163 flow, removed 60 selfloop flow, removed 9 redundant places. [2023-08-31 04:07:04,699 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 903 flow [2023-08-31 04:07:04,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=903, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2023-08-31 04:07:04,699 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2023-08-31 04:07:04,700 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 903 flow [2023-08-31 04:07:04,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.4375) internal successors, (1943), 16 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:04,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:04,701 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:04,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:04,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:04,906 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:04,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:04,907 INFO L85 PathProgramCache]: Analyzing trace with hash -293986682, now seen corresponding path program 4 times [2023-08-31 04:07:04,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:04,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073758906] [2023-08-31 04:07:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:04,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:05,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073758906] [2023-08-31 04:07:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073758906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9303542] [2023-08-31 04:07:05,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:07:05,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:05,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:05,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:05,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:07:05,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:07:05,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 04:07:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:06,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:07:06,148 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:07:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:06,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:06,231 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:07:06,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-31 04:07:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9303542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:06,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:06,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-08-31 04:07:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853735601] [2023-08-31 04:07:06,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:06,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:06,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:07,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 330 [2023-08-31 04:07:07,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 903 flow. Second operand has 17 states, 17 states have (on average 120.3529411764706) internal successors, (2046), 17 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:07,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:07,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 330 [2023-08-31 04:07:07,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:07,581 INFO L130 PetriNetUnfolder]: 402/735 cut-off events. [2023-08-31 04:07:07,582 INFO L131 PetriNetUnfolder]: For 2883/2965 co-relation queries the response was YES. [2023-08-31 04:07:07,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 735 events. 402/735 cut-off events. For 2883/2965 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3285 event pairs, 89 based on Foata normal form. 63/789 useless extension candidates. Maximal degree in co-relation 3175. Up to 561 conditions per place. [2023-08-31 04:07:07,588 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 99 selfloop transitions, 37 changer transitions 1/142 dead transitions. [2023-08-31 04:07:07,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 142 transitions, 1488 flow [2023-08-31 04:07:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:07:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:07:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1725 transitions. [2023-08-31 04:07:07,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2023-08-31 04:07:07,592 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1725 transitions. [2023-08-31 04:07:07,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1725 transitions. [2023-08-31 04:07:07,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:07,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1725 transitions. [2023-08-31 04:07:07,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.21428571428571) internal successors, (1725), 14 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:07,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:07,614 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:07,614 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 903 flow. Second operand 14 states and 1725 transitions. [2023-08-31 04:07:07,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 142 transitions, 1488 flow [2023-08-31 04:07:07,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1404 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-08-31 04:07:07,623 INFO L231 Difference]: Finished difference. Result has 84 places, 108 transitions, 1102 flow [2023-08-31 04:07:07,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1102, PETRI_PLACES=84, PETRI_TRANSITIONS=108} [2023-08-31 04:07:07,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2023-08-31 04:07:07,624 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 108 transitions, 1102 flow [2023-08-31 04:07:07,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 120.3529411764706) internal successors, (2046), 17 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:07,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:07,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:07,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:07,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:07,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:07,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash -720202900, now seen corresponding path program 5 times [2023-08-31 04:07:07,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:07,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359029412] [2023-08-31 04:07:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:07,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:08,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359029412] [2023-08-31 04:07:08,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359029412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254180746] [2023-08-31 04:07:08,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:07:08,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:08,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:08,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:08,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:07:08,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:07:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:07:08,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:07:08,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-31 04:07:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:07:09,003 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-08-31 04:07:09,003 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2023-08-31 04:07:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:09,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:07:09,160 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-08-31 04:07:09,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:07:09,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-31 04:07:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:09,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254180746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:09,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:09,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-08-31 04:07:09,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067984801] [2023-08-31 04:07:09,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:07:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:07:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=358, Unknown=2, NotChecked=0, Total=420 [2023-08-31 04:07:11,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:07:13,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:07:15,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:07:18,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:07:18,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-08-31 04:07:18,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 108 transitions, 1102 flow. Second operand has 21 states, 21 states have (on average 98.80952380952381) internal successors, (2075), 21 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:18,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:18,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-08-31 04:07:18,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:19,461 INFO L130 PetriNetUnfolder]: 554/1015 cut-off events. [2023-08-31 04:07:19,461 INFO L131 PetriNetUnfolder]: For 3670/3783 co-relation queries the response was YES. [2023-08-31 04:07:19,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 1015 events. 554/1015 cut-off events. For 3670/3783 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4877 event pairs, 85 based on Foata normal form. 107/1113 useless extension candidates. Maximal degree in co-relation 4398. Up to 645 conditions per place. [2023-08-31 04:07:19,470 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 112 selfloop transitions, 59 changer transitions 2/178 dead transitions. [2023-08-31 04:07:19,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1882 flow [2023-08-31 04:07:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 04:07:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 04:07:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1547 transitions. [2023-08-31 04:07:19,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31252525252525254 [2023-08-31 04:07:19,475 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1547 transitions. [2023-08-31 04:07:19,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1547 transitions. [2023-08-31 04:07:19,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:19,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1547 transitions. [2023-08-31 04:07:19,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 103.13333333333334) internal successors, (1547), 15 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:19,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:19,485 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:19,485 INFO L175 Difference]: Start difference. First operand has 84 places, 108 transitions, 1102 flow. Second operand 15 states and 1547 transitions. [2023-08-31 04:07:19,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1882 flow [2023-08-31 04:07:19,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1769 flow, removed 45 selfloop flow, removed 5 redundant places. [2023-08-31 04:07:19,496 INFO L231 Difference]: Finished difference. Result has 98 places, 132 transitions, 1442 flow [2023-08-31 04:07:19,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1442, PETRI_PLACES=98, PETRI_TRANSITIONS=132} [2023-08-31 04:07:19,497 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-08-31 04:07:19,497 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 132 transitions, 1442 flow [2023-08-31 04:07:19,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.80952380952381) internal successors, (2075), 21 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:19,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:19,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:19,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:19,706 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,SelfDestructingSolverStorable11 [2023-08-31 04:07:19,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:19,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1967274485, now seen corresponding path program 6 times [2023-08-31 04:07:19,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:19,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673588258] [2023-08-31 04:07:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:19,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673588258] [2023-08-31 04:07:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673588258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286206455] [2023-08-31 04:07:19,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:07:19,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:19,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:19,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 04:07:20,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:07:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:20,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:20,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286206455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:20,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:20,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-31 04:07:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229838106] [2023-08-31 04:07:20,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:20,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:20,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:20,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:20,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 132 transitions, 1442 flow. Second operand has 17 states, 17 states have (on average 132.23529411764707) internal successors, (2248), 17 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:20,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:20,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:20,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:22,350 INFO L130 PetriNetUnfolder]: 941/1743 cut-off events. [2023-08-31 04:07:22,351 INFO L131 PetriNetUnfolder]: For 7357/7357 co-relation queries the response was YES. [2023-08-31 04:07:22,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 1743 events. 941/1743 cut-off events. For 7357/7357 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9805 event pairs, 97 based on Foata normal form. 24/1766 useless extension candidates. Maximal degree in co-relation 7471. Up to 617 conditions per place. [2023-08-31 04:07:22,360 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 179 selfloop transitions, 151 changer transitions 13/343 dead transitions. [2023-08-31 04:07:22,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 343 transitions, 4014 flow [2023-08-31 04:07:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 04:07:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 04:07:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3386 transitions. [2023-08-31 04:07:22,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4104242424242424 [2023-08-31 04:07:22,367 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3386 transitions. [2023-08-31 04:07:22,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3386 transitions. [2023-08-31 04:07:22,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:22,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3386 transitions. [2023-08-31 04:07:22,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 135.44) internal successors, (3386), 25 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:22,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:22,386 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:22,386 INFO L175 Difference]: Start difference. First operand has 98 places, 132 transitions, 1442 flow. Second operand 25 states and 3386 transitions. [2023-08-31 04:07:22,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 343 transitions, 4014 flow [2023-08-31 04:07:22,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 343 transitions, 3773 flow, removed 109 selfloop flow, removed 5 redundant places. [2023-08-31 04:07:22,417 INFO L231 Difference]: Finished difference. Result has 127 places, 247 transitions, 3113 flow [2023-08-31 04:07:22,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3113, PETRI_PLACES=127, PETRI_TRANSITIONS=247} [2023-08-31 04:07:22,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2023-08-31 04:07:22,418 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 247 transitions, 3113 flow [2023-08-31 04:07:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.23529411764707) internal successors, (2248), 17 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:22,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:22,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:22,627 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,SelfDestructingSolverStorable12 [2023-08-31 04:07:22,628 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:22,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -576327455, now seen corresponding path program 7 times [2023-08-31 04:07:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:22,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249608863] [2023-08-31 04:07:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249608863] [2023-08-31 04:07:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249608863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087251325] [2023-08-31 04:07:22,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:07:22,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:22,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:22,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:22,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 04:07:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:22,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087251325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:23,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:23,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-08-31 04:07:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927212666] [2023-08-31 04:07:23,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:07:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:07:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-31 04:07:23,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:23,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 247 transitions, 3113 flow. Second operand has 14 states, 14 states have (on average 132.14285714285714) internal successors, (1850), 14 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:23,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:23,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:23,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:24,129 INFO L130 PetriNetUnfolder]: 1059/2039 cut-off events. [2023-08-31 04:07:24,129 INFO L131 PetriNetUnfolder]: For 13217/13217 co-relation queries the response was YES. [2023-08-31 04:07:24,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11194 conditions, 2039 events. 1059/2039 cut-off events. For 13217/13217 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12462 event pairs, 76 based on Foata normal form. 36/2074 useless extension candidates. Maximal degree in co-relation 10660. Up to 721 conditions per place. [2023-08-31 04:07:24,149 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 210 selfloop transitions, 162 changer transitions 22/394 dead transitions. [2023-08-31 04:07:24,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 394 transitions, 5154 flow [2023-08-31 04:07:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 04:07:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 04:07:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2854 transitions. [2023-08-31 04:07:24,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41183261183261183 [2023-08-31 04:07:24,154 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2854 transitions. [2023-08-31 04:07:24,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2854 transitions. [2023-08-31 04:07:24,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:24,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2854 transitions. [2023-08-31 04:07:24,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 135.9047619047619) internal successors, (2854), 21 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:24,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:24,166 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:24,166 INFO L175 Difference]: Start difference. First operand has 127 places, 247 transitions, 3113 flow. Second operand 21 states and 2854 transitions. [2023-08-31 04:07:24,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 394 transitions, 5154 flow [2023-08-31 04:07:24,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 394 transitions, 4746 flow, removed 180 selfloop flow, removed 1 redundant places. [2023-08-31 04:07:24,230 INFO L231 Difference]: Finished difference. Result has 154 places, 289 transitions, 3798 flow [2023-08-31 04:07:24,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3798, PETRI_PLACES=154, PETRI_TRANSITIONS=289} [2023-08-31 04:07:24,232 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-08-31 04:07:24,232 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 289 transitions, 3798 flow [2023-08-31 04:07:24,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 132.14285714285714) internal successors, (1850), 14 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:24,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:24,233 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:24,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:24,439 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,SelfDestructingSolverStorable13 [2023-08-31 04:07:24,439 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:24,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash -554240795, now seen corresponding path program 8 times [2023-08-31 04:07:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565237150] [2023-08-31 04:07:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:24,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:24,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565237150] [2023-08-31 04:07:24,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565237150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124589630] [2023-08-31 04:07:24,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:07:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:24,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:24,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 04:07:24,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:07:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:24,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:24,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124589630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:24,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:24,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-31 04:07:24,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006749052] [2023-08-31 04:07:24,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:24,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 04:07:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:24,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 04:07:24,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-31 04:07:25,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:25,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 289 transitions, 3798 flow. Second operand has 15 states, 15 states have (on average 132.4) internal successors, (1986), 15 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:25,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:25,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:25,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:25,902 INFO L130 PetriNetUnfolder]: 1019/1963 cut-off events. [2023-08-31 04:07:25,902 INFO L131 PetriNetUnfolder]: For 14363/14363 co-relation queries the response was YES. [2023-08-31 04:07:25,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11907 conditions, 1963 events. 1019/1963 cut-off events. For 14363/14363 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11669 event pairs, 157 based on Foata normal form. 20/1982 useless extension candidates. Maximal degree in co-relation 11603. Up to 626 conditions per place. [2023-08-31 04:07:25,920 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 222 selfloop transitions, 123 changer transitions 6/351 dead transitions. [2023-08-31 04:07:25,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 351 transitions, 5103 flow [2023-08-31 04:07:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 04:07:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 04:07:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1517 transitions. [2023-08-31 04:07:25,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41790633608815425 [2023-08-31 04:07:25,924 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1517 transitions. [2023-08-31 04:07:25,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1517 transitions. [2023-08-31 04:07:25,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:25,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1517 transitions. [2023-08-31 04:07:25,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 137.9090909090909) internal successors, (1517), 11 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:25,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:25,930 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:25,930 INFO L175 Difference]: Start difference. First operand has 154 places, 289 transitions, 3798 flow. Second operand 11 states and 1517 transitions. [2023-08-31 04:07:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 351 transitions, 5103 flow [2023-08-31 04:07:26,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 351 transitions, 4618 flow, removed 203 selfloop flow, removed 6 redundant places. [2023-08-31 04:07:26,021 INFO L231 Difference]: Finished difference. Result has 158 places, 293 transitions, 3731 flow [2023-08-31 04:07:26,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3731, PETRI_PLACES=158, PETRI_TRANSITIONS=293} [2023-08-31 04:07:26,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-08-31 04:07:26,022 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 293 transitions, 3731 flow [2023-08-31 04:07:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 132.4) internal successors, (1986), 15 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:26,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:26,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:26,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 04:07:26,223 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,SelfDestructingSolverStorable14 [2023-08-31 04:07:26,223 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:26,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -282767609, now seen corresponding path program 9 times [2023-08-31 04:07:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:26,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624168620] [2023-08-31 04:07:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:26,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624168620] [2023-08-31 04:07:26,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624168620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889647560] [2023-08-31 04:07:26,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:07:26,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:26,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:26,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 04:07:26,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:07:26,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:26,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889647560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:26,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:26,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-31 04:07:26,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493156785] [2023-08-31 04:07:26,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:26,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:07:26,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:07:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:07:27,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:27,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 293 transitions, 3731 flow. Second operand has 19 states, 19 states have (on average 131.78947368421052) internal successors, (2504), 19 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:27,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:27,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:27,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:28,771 INFO L130 PetriNetUnfolder]: 959/1836 cut-off events. [2023-08-31 04:07:28,772 INFO L131 PetriNetUnfolder]: For 11893/11893 co-relation queries the response was YES. [2023-08-31 04:07:28,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10778 conditions, 1836 events. 959/1836 cut-off events. For 11893/11893 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10843 event pairs, 171 based on Foata normal form. 120/1955 useless extension candidates. Maximal degree in co-relation 10364. Up to 752 conditions per place. [2023-08-31 04:07:28,788 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 158 selfloop transitions, 240 changer transitions 8/406 dead transitions. [2023-08-31 04:07:28,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 406 transitions, 5607 flow [2023-08-31 04:07:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 04:07:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 04:07:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2996 transitions. [2023-08-31 04:07:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126721763085399 [2023-08-31 04:07:28,793 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2996 transitions. [2023-08-31 04:07:28,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2996 transitions. [2023-08-31 04:07:28,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:28,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2996 transitions. [2023-08-31 04:07:28,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 136.1818181818182) internal successors, (2996), 22 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:28,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:28,805 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 330.0) internal successors, (7590), 23 states have internal predecessors, (7590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:28,805 INFO L175 Difference]: Start difference. First operand has 158 places, 293 transitions, 3731 flow. Second operand 22 states and 2996 transitions. [2023-08-31 04:07:28,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 406 transitions, 5607 flow [2023-08-31 04:07:28,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 406 transitions, 5226 flow, removed 98 selfloop flow, removed 9 redundant places. [2023-08-31 04:07:28,879 INFO L231 Difference]: Finished difference. Result has 170 places, 337 transitions, 4801 flow [2023-08-31 04:07:28,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4801, PETRI_PLACES=170, PETRI_TRANSITIONS=337} [2023-08-31 04:07:28,879 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-08-31 04:07:28,880 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 337 transitions, 4801 flow [2023-08-31 04:07:28,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 131.78947368421052) internal successors, (2504), 19 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:28,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:28,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:28,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:29,086 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,SelfDestructingSolverStorable15 [2023-08-31 04:07:29,086 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:29,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1636053091, now seen corresponding path program 10 times [2023-08-31 04:07:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502362689] [2023-08-31 04:07:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:29,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:29,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502362689] [2023-08-31 04:07:29,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502362689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651503562] [2023-08-31 04:07:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:07:29,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:29,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:29,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:29,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 04:07:29,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:07:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:29,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:29,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651503562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:29,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:29,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:07:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305510604] [2023-08-31 04:07:29,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:29,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:29,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 337 transitions, 4801 flow. Second operand has 17 states, 17 states have (on average 131.88235294117646) internal successors, (2242), 17 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:29,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:29,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:29,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:30,983 INFO L130 PetriNetUnfolder]: 982/1992 cut-off events. [2023-08-31 04:07:30,983 INFO L131 PetriNetUnfolder]: For 13255/13255 co-relation queries the response was YES. [2023-08-31 04:07:30,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12342 conditions, 1992 events. 982/1992 cut-off events. For 13255/13255 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12696 event pairs, 89 based on Foata normal form. 42/2033 useless extension candidates. Maximal degree in co-relation 11856. Up to 515 conditions per place. [2023-08-31 04:07:30,997 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 175 selfloop transitions, 267 changer transitions 14/456 dead transitions. [2023-08-31 04:07:30,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 456 transitions, 6703 flow [2023-08-31 04:07:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 04:07:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 04:07:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4183 transitions. [2023-08-31 04:07:31,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088954056695992 [2023-08-31 04:07:31,009 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4183 transitions. [2023-08-31 04:07:31,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4183 transitions. [2023-08-31 04:07:31,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:31,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4183 transitions. [2023-08-31 04:07:31,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 134.93548387096774) internal successors, (4183), 31 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:31,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 330.0) internal successors, (10560), 32 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:31,024 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 330.0) internal successors, (10560), 32 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:31,024 INFO L175 Difference]: Start difference. First operand has 170 places, 337 transitions, 4801 flow. Second operand 31 states and 4183 transitions. [2023-08-31 04:07:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 456 transitions, 6703 flow [2023-08-31 04:07:31,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 456 transitions, 6325 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-08-31 04:07:31,108 INFO L231 Difference]: Finished difference. Result has 201 places, 366 transitions, 5563 flow [2023-08-31 04:07:31,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=4241, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5563, PETRI_PLACES=201, PETRI_TRANSITIONS=366} [2023-08-31 04:07:31,109 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2023-08-31 04:07:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 366 transitions, 5563 flow [2023-08-31 04:07:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.88235294117646) internal successors, (2242), 17 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:31,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:31,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:31,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:31,315 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,SelfDestructingSolverStorable16 [2023-08-31 04:07:31,315 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:31,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1487088225, now seen corresponding path program 11 times [2023-08-31 04:07:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:31,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047170143] [2023-08-31 04:07:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:31,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:31,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047170143] [2023-08-31 04:07:31,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047170143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:31,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883980838] [2023-08-31 04:07:31,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:07:31,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:31,507 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:31,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 04:07:31,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:07:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:31,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:31,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883980838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:31,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:07:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334889222] [2023-08-31 04:07:31,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:32,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:32,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 366 transitions, 5563 flow. Second operand has 17 states, 17 states have (on average 131.76470588235293) internal successors, (2240), 17 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:32,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:32,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:32,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:34,199 INFO L130 PetriNetUnfolder]: 1085/2173 cut-off events. [2023-08-31 04:07:34,200 INFO L131 PetriNetUnfolder]: For 16496/16496 co-relation queries the response was YES. [2023-08-31 04:07:34,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14589 conditions, 2173 events. 1085/2173 cut-off events. For 16496/16496 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14067 event pairs, 144 based on Foata normal form. 22/2194 useless extension candidates. Maximal degree in co-relation 14079. Up to 877 conditions per place. [2023-08-31 04:07:34,216 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 247 selfloop transitions, 297 changer transitions 3/547 dead transitions. [2023-08-31 04:07:34,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 547 transitions, 8492 flow [2023-08-31 04:07:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 04:07:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 04:07:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5266 transitions. [2023-08-31 04:07:34,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40916860916860914 [2023-08-31 04:07:34,223 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5266 transitions. [2023-08-31 04:07:34,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5266 transitions. [2023-08-31 04:07:34,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:34,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5266 transitions. [2023-08-31 04:07:34,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 135.02564102564102) internal successors, (5266), 39 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:34,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 330.0) internal successors, (13200), 40 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:34,240 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 330.0) internal successors, (13200), 40 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:34,240 INFO L175 Difference]: Start difference. First operand has 201 places, 366 transitions, 5563 flow. Second operand 39 states and 5266 transitions. [2023-08-31 04:07:34,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 547 transitions, 8492 flow [2023-08-31 04:07:34,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 547 transitions, 8072 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-08-31 04:07:34,397 INFO L231 Difference]: Finished difference. Result has 247 places, 444 transitions, 7277 flow [2023-08-31 04:07:34,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7277, PETRI_PLACES=247, PETRI_TRANSITIONS=444} [2023-08-31 04:07:34,398 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2023-08-31 04:07:34,398 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 444 transitions, 7277 flow [2023-08-31 04:07:34,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.76470588235293) internal successors, (2240), 17 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:34,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:34,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:34,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:34,604 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:34,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1971006443, now seen corresponding path program 12 times [2023-08-31 04:07:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474800201] [2023-08-31 04:07:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:34,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:34,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:34,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474800201] [2023-08-31 04:07:34,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474800201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:34,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501903868] [2023-08-31 04:07:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:07:34,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:34,813 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:34,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 04:07:35,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:07:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:35,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:35,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:35,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501903868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:35,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:35,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:07:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93663131] [2023-08-31 04:07:35,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:35,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:35,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:35,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 444 transitions, 7277 flow. Second operand has 17 states, 17 states have (on average 131.76470588235293) internal successors, (2240), 17 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:35,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:35,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:37,314 INFO L130 PetriNetUnfolder]: 1219/2448 cut-off events. [2023-08-31 04:07:37,315 INFO L131 PetriNetUnfolder]: For 22101/22101 co-relation queries the response was YES. [2023-08-31 04:07:37,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17689 conditions, 2448 events. 1219/2448 cut-off events. For 22101/22101 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16186 event pairs, 217 based on Foata normal form. 12/2459 useless extension candidates. Maximal degree in co-relation 17165. Up to 1036 conditions per place. [2023-08-31 04:07:37,336 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 265 selfloop transitions, 316 changer transitions 3/584 dead transitions. [2023-08-31 04:07:37,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 584 transitions, 9978 flow [2023-08-31 04:07:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 04:07:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 04:07:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3541 transitions. [2023-08-31 04:07:37,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127039627039627 [2023-08-31 04:07:37,342 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3541 transitions. [2023-08-31 04:07:37,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3541 transitions. [2023-08-31 04:07:37,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:37,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3541 transitions. [2023-08-31 04:07:37,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 136.19230769230768) internal successors, (3541), 26 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:37,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 330.0) internal successors, (8910), 27 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:37,396 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 330.0) internal successors, (8910), 27 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:37,396 INFO L175 Difference]: Start difference. First operand has 247 places, 444 transitions, 7277 flow. Second operand 26 states and 3541 transitions. [2023-08-31 04:07:37,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 584 transitions, 9978 flow [2023-08-31 04:07:37,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 584 transitions, 9610 flow, removed 148 selfloop flow, removed 6 redundant places. [2023-08-31 04:07:37,595 INFO L231 Difference]: Finished difference. Result has 267 places, 491 transitions, 8595 flow [2023-08-31 04:07:37,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8595, PETRI_PLACES=267, PETRI_TRANSITIONS=491} [2023-08-31 04:07:37,596 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-08-31 04:07:37,596 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 491 transitions, 8595 flow [2023-08-31 04:07:37,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.76470588235293) internal successors, (2240), 17 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:37,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:37,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:37,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:37,803 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:37,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -405140153, now seen corresponding path program 13 times [2023-08-31 04:07:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:37,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062179620] [2023-08-31 04:07:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:38,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:38,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062179620] [2023-08-31 04:07:38,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062179620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:38,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256577942] [2023-08-31 04:07:38,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:07:38,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:38,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:38,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:38,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 04:07:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:38,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256577942] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:38,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:38,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-31 04:07:38,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605594178] [2023-08-31 04:07:38,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:38,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:07:38,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:38,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:07:38,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:07:38,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:38,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 491 transitions, 8595 flow. Second operand has 16 states, 16 states have (on average 131.9375) internal successors, (2111), 16 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:38,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:38,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:41,137 INFO L130 PetriNetUnfolder]: 1165/2372 cut-off events. [2023-08-31 04:07:41,137 INFO L131 PetriNetUnfolder]: For 24543/24543 co-relation queries the response was YES. [2023-08-31 04:07:41,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17721 conditions, 2372 events. 1165/2372 cut-off events. For 24543/24543 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15751 event pairs, 97 based on Foata normal form. 44/2415 useless extension candidates. Maximal degree in co-relation 17228. Up to 507 conditions per place. [2023-08-31 04:07:41,157 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 267 selfloop transitions, 325 changer transitions 5/597 dead transitions. [2023-08-31 04:07:41,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 597 transitions, 10372 flow [2023-08-31 04:07:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 04:07:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 04:07:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5927 transitions. [2023-08-31 04:07:41,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081955922865014 [2023-08-31 04:07:41,167 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5927 transitions. [2023-08-31 04:07:41,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5927 transitions. [2023-08-31 04:07:41,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:41,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5927 transitions. [2023-08-31 04:07:41,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 134.70454545454547) internal successors, (5927), 44 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:41,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 330.0) internal successors, (14850), 45 states have internal predecessors, (14850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:41,185 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 330.0) internal successors, (14850), 45 states have internal predecessors, (14850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:41,186 INFO L175 Difference]: Start difference. First operand has 267 places, 491 transitions, 8595 flow. Second operand 44 states and 5927 transitions. [2023-08-31 04:07:41,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 597 transitions, 10372 flow [2023-08-31 04:07:41,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 597 transitions, 10015 flow, removed 80 selfloop flow, removed 10 redundant places. [2023-08-31 04:07:41,459 INFO L231 Difference]: Finished difference. Result has 301 places, 482 transitions, 8781 flow [2023-08-31 04:07:41,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=7849, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8781, PETRI_PLACES=301, PETRI_TRANSITIONS=482} [2023-08-31 04:07:41,460 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-08-31 04:07:41,460 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 482 transitions, 8781 flow [2023-08-31 04:07:41,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.9375) internal successors, (2111), 16 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:41,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:41,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:41,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:41,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:41,666 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:41,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1666404129, now seen corresponding path program 14 times [2023-08-31 04:07:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:41,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175824719] [2023-08-31 04:07:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175824719] [2023-08-31 04:07:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175824719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404465079] [2023-08-31 04:07:41,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:07:41,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:41,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:41,877 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:41,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 04:07:42,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:07:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:42,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404465079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:42,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:42,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:07:42,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63066608] [2023-08-31 04:07:42,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:42,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:42,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:42,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:42,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 482 transitions, 8781 flow. Second operand has 17 states, 17 states have (on average 131.94117647058823) internal successors, (2243), 17 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:42,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:42,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:42,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:48,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:07:53,022 INFO L130 PetriNetUnfolder]: 1802/3712 cut-off events. [2023-08-31 04:07:53,022 INFO L131 PetriNetUnfolder]: For 41975/41975 co-relation queries the response was YES. [2023-08-31 04:07:53,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29330 conditions, 3712 events. 1802/3712 cut-off events. For 41975/41975 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27499 event pairs, 167 based on Foata normal form. 58/3769 useless extension candidates. Maximal degree in co-relation 28714. Up to 799 conditions per place. [2023-08-31 04:07:53,053 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 443 selfloop transitions, 477 changer transitions 30/950 dead transitions. [2023-08-31 04:07:53,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 950 transitions, 18425 flow [2023-08-31 04:07:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 04:07:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 04:07:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5155 transitions. [2023-08-31 04:07:53,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41108452950558216 [2023-08-31 04:07:53,117 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5155 transitions. [2023-08-31 04:07:53,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5155 transitions. [2023-08-31 04:07:53,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:53,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5155 transitions. [2023-08-31 04:07:53,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 135.6578947368421) internal successors, (5155), 38 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:53,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 330.0) internal successors, (12870), 39 states have internal predecessors, (12870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:53,132 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 330.0) internal successors, (12870), 39 states have internal predecessors, (12870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:53,133 INFO L175 Difference]: Start difference. First operand has 301 places, 482 transitions, 8781 flow. Second operand 38 states and 5155 transitions. [2023-08-31 04:07:53,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 950 transitions, 18425 flow [2023-08-31 04:07:53,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 950 transitions, 17635 flow, removed 173 selfloop flow, removed 22 redundant places. [2023-08-31 04:07:53,463 INFO L231 Difference]: Finished difference. Result has 338 places, 751 transitions, 15293 flow [2023-08-31 04:07:53,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=8350, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15293, PETRI_PLACES=338, PETRI_TRANSITIONS=751} [2023-08-31 04:07:53,465 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 317 predicate places. [2023-08-31 04:07:53,465 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 751 transitions, 15293 flow [2023-08-31 04:07:53,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.94117647058823) internal successors, (2243), 17 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:53,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:53,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:53,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:53,671 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:53,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 920637313, now seen corresponding path program 15 times [2023-08-31 04:07:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266035767] [2023-08-31 04:07:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266035767] [2023-08-31 04:07:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266035767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:53,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109100309] [2023-08-31 04:07:53,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:07:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:53,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:53,865 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:53,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 04:07:54,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:07:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:54,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109100309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:54,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:54,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:07:54,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865546461] [2023-08-31 04:07:54,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:54,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:07:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:07:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:07:54,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:54,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 751 transitions, 15293 flow. Second operand has 17 states, 17 states have (on average 131.88235294117646) internal successors, (2242), 17 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:54,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:54,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:54,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:56,740 INFO L130 PetriNetUnfolder]: 2185/4378 cut-off events. [2023-08-31 04:07:56,740 INFO L131 PetriNetUnfolder]: For 61290/61290 co-relation queries the response was YES. [2023-08-31 04:07:56,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38955 conditions, 4378 events. 2185/4378 cut-off events. For 61290/61290 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33015 event pairs, 568 based on Foata normal form. 108/4485 useless extension candidates. Maximal degree in co-relation 38546. Up to 2971 conditions per place. [2023-08-31 04:07:56,777 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 632 selfloop transitions, 437 changer transitions 1/1070 dead transitions. [2023-08-31 04:07:56,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1070 transitions, 23714 flow [2023-08-31 04:07:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 04:07:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 04:07:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4845 transitions. [2023-08-31 04:07:56,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078282828282828 [2023-08-31 04:07:56,782 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4845 transitions. [2023-08-31 04:07:56,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4845 transitions. [2023-08-31 04:07:56,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:56,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4845 transitions. [2023-08-31 04:07:56,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 134.58333333333334) internal successors, (4845), 36 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:56,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 330.0) internal successors, (12210), 37 states have internal predecessors, (12210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:56,797 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 330.0) internal successors, (12210), 37 states have internal predecessors, (12210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:56,798 INFO L175 Difference]: Start difference. First operand has 338 places, 751 transitions, 15293 flow. Second operand 36 states and 4845 transitions. [2023-08-31 04:07:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1070 transitions, 23714 flow [2023-08-31 04:07:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1070 transitions, 23047 flow, removed 327 selfloop flow, removed 3 redundant places. [2023-08-31 04:07:57,654 INFO L231 Difference]: Finished difference. Result has 385 places, 966 transitions, 21265 flow [2023-08-31 04:07:57,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=14612, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21265, PETRI_PLACES=385, PETRI_TRANSITIONS=966} [2023-08-31 04:07:57,655 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 364 predicate places. [2023-08-31 04:07:57,656 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 966 transitions, 21265 flow [2023-08-31 04:07:57,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.88235294117646) internal successors, (2242), 17 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:57,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:57,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:57,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:57,857 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:57,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1077295607, now seen corresponding path program 16 times [2023-08-31 04:07:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284784600] [2023-08-31 04:07:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:58,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:58,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284784600] [2023-08-31 04:07:58,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284784600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:58,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249904048] [2023-08-31 04:07:58,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:07:58,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:58,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:58,071 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:07:58,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 04:07:58,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:07:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:07:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:58,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:07:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249904048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:58,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:58,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-31 04:07:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815704639] [2023-08-31 04:07:58,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:58,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:07:58,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:07:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:07:58,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:07:58,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 966 transitions, 21265 flow. Second operand has 18 states, 18 states have (on average 131.72222222222223) internal successors, (2371), 18 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) [2023-08-31 04:07:58,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:58,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:07:58,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:02,538 INFO L130 PetriNetUnfolder]: 2621/5315 cut-off events. [2023-08-31 04:08:02,539 INFO L131 PetriNetUnfolder]: For 101781/101781 co-relation queries the response was YES. [2023-08-31 04:08:02,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50964 conditions, 5315 events. 2621/5315 cut-off events. For 101781/101781 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 41699 event pairs, 369 based on Foata normal form. 48/5362 useless extension candidates. Maximal degree in co-relation 49892. Up to 1724 conditions per place. [2023-08-31 04:08:02,672 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 565 selfloop transitions, 700 changer transitions 2/1267 dead transitions. [2023-08-31 04:08:02,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1267 transitions, 29823 flow [2023-08-31 04:08:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 04:08:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 04:08:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3673 transitions. [2023-08-31 04:08:02,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122334455667789 [2023-08-31 04:08:02,676 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3673 transitions. [2023-08-31 04:08:02,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3673 transitions. [2023-08-31 04:08:02,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:02,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3673 transitions. [2023-08-31 04:08:02,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 136.03703703703704) internal successors, (3673), 27 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 330.0) internal successors, (9240), 28 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,688 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 330.0) internal successors, (9240), 28 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,688 INFO L175 Difference]: Start difference. First operand has 385 places, 966 transitions, 21265 flow. Second operand 27 states and 3673 transitions. [2023-08-31 04:08:02,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1267 transitions, 29823 flow [2023-08-31 04:08:04,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1267 transitions, 28945 flow, removed 365 selfloop flow, removed 8 redundant places. [2023-08-31 04:08:04,097 INFO L231 Difference]: Finished difference. Result has 412 places, 1121 transitions, 26746 flow [2023-08-31 04:08:04,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=20531, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26746, PETRI_PLACES=412, PETRI_TRANSITIONS=1121} [2023-08-31 04:08:04,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-08-31 04:08:04,098 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1121 transitions, 26746 flow [2023-08-31 04:08:04,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.72222222222223) internal successors, (2371), 18 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) [2023-08-31 04:08:04,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:04,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:04,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:04,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:04,300 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:04,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash 742378723, now seen corresponding path program 17 times [2023-08-31 04:08:04,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:04,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633397378] [2023-08-31 04:08:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:04,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633397378] [2023-08-31 04:08:04,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633397378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:04,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432320911] [2023-08-31 04:08:04,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:08:04,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:04,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:04,489 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:04,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 04:08:04,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:08:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:08:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:04,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432320911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:04,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:08:04,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740813665] [2023-08-31 04:08:04,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:04,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:08:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:08:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:08:04,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:08:04,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1121 transitions, 26746 flow. Second operand has 17 states, 17 states have (on average 131.88235294117646) internal successors, (2242), 17 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:04,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:04,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:08:04,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:11,479 INFO L130 PetriNetUnfolder]: 2598/5362 cut-off events. [2023-08-31 04:08:11,479 INFO L131 PetriNetUnfolder]: For 117367/117367 co-relation queries the response was YES. [2023-08-31 04:08:11,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54106 conditions, 5362 events. 2598/5362 cut-off events. For 117367/117367 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 42932 event pairs, 178 based on Foata normal form. 54/5415 useless extension candidates. Maximal degree in co-relation 53061. Up to 1163 conditions per place. [2023-08-31 04:08:11,531 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 479 selfloop transitions, 810 changer transitions 23/1312 dead transitions. [2023-08-31 04:08:11,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 1312 transitions, 32257 flow [2023-08-31 04:08:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 04:08:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 04:08:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6981 transitions. [2023-08-31 04:08:11,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2023-08-31 04:08:11,537 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6981 transitions. [2023-08-31 04:08:11,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6981 transitions. [2023-08-31 04:08:11,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:11,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6981 transitions. [2023-08-31 04:08:11,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 134.25) internal successors, (6981), 52 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:11,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 330.0) internal successors, (17490), 53 states have internal predecessors, (17490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:11,559 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 330.0) internal successors, (17490), 53 states have internal predecessors, (17490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:11,559 INFO L175 Difference]: Start difference. First operand has 412 places, 1121 transitions, 26746 flow. Second operand 52 states and 6981 transitions. [2023-08-31 04:08:11,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 1312 transitions, 32257 flow [2023-08-31 04:08:13,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1312 transitions, 31278 flow, removed 417 selfloop flow, removed 8 redundant places. [2023-08-31 04:08:13,117 INFO L231 Difference]: Finished difference. Result has 465 places, 1176 transitions, 29775 flow [2023-08-31 04:08:13,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=25695, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=29775, PETRI_PLACES=465, PETRI_TRANSITIONS=1176} [2023-08-31 04:08:13,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 444 predicate places. [2023-08-31 04:08:13,119 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1176 transitions, 29775 flow [2023-08-31 04:08:13,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.88235294117646) internal successors, (2242), 17 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:13,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:13,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:13,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:13,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 04:08:13,320 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:13,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1200514761, now seen corresponding path program 18 times [2023-08-31 04:08:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:13,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618565578] [2023-08-31 04:08:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618565578] [2023-08-31 04:08:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618565578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494931247] [2023-08-31 04:08:13,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:08:13,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:13,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:13,495 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:13,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 04:08:13,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:08:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:13,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:08:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:13,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:13,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494931247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:13,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 04:08:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576785018] [2023-08-31 04:08:13,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:08:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:08:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:08:14,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:08:14,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1176 transitions, 29775 flow. Second operand has 18 states, 18 states have (on average 131.88888888888889) internal successors, (2374), 18 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:14,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:14,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:08:14,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:20,762 INFO L130 PetriNetUnfolder]: 3235/6788 cut-off events. [2023-08-31 04:08:20,762 INFO L131 PetriNetUnfolder]: For 162621/162621 co-relation queries the response was YES. [2023-08-31 04:08:20,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71150 conditions, 6788 events. 3235/6788 cut-off events. For 162621/162621 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 57329 event pairs, 52 based on Foata normal form. 56/6843 useless extension candidates. Maximal degree in co-relation 70115. Up to 1348 conditions per place. [2023-08-31 04:08:20,845 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 713 selfloop transitions, 977 changer transitions 27/1717 dead transitions. [2023-08-31 04:08:20,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1717 transitions, 45156 flow [2023-08-31 04:08:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 04:08:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 04:08:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6634 transitions. [2023-08-31 04:08:20,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41026592455163885 [2023-08-31 04:08:20,850 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6634 transitions. [2023-08-31 04:08:20,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6634 transitions. [2023-08-31 04:08:20,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:20,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6634 transitions. [2023-08-31 04:08:20,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 135.3877551020408) internal successors, (6634), 49 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:20,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 330.0) internal successors, (16500), 50 states have internal predecessors, (16500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:20,869 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 330.0) internal successors, (16500), 50 states have internal predecessors, (16500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:20,869 INFO L175 Difference]: Start difference. First operand has 465 places, 1176 transitions, 29775 flow. Second operand 49 states and 6634 transitions. [2023-08-31 04:08:20,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1717 transitions, 45156 flow [2023-08-31 04:08:23,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1717 transitions, 43881 flow, removed 465 selfloop flow, removed 23 redundant places. [2023-08-31 04:08:23,737 INFO L231 Difference]: Finished difference. Result has 503 places, 1419 transitions, 38633 flow [2023-08-31 04:08:23,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=28697, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=38633, PETRI_PLACES=503, PETRI_TRANSITIONS=1419} [2023-08-31 04:08:23,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 482 predicate places. [2023-08-31 04:08:23,739 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1419 transitions, 38633 flow [2023-08-31 04:08:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.88888888888889) internal successors, (2374), 18 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:23,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:23,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:23,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:23,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-31 04:08:23,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:23,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:23,946 INFO L85 PathProgramCache]: Analyzing trace with hash 774526803, now seen corresponding path program 19 times [2023-08-31 04:08:23,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:23,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370554935] [2023-08-31 04:08:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:23,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:24,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370554935] [2023-08-31 04:08:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370554935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364778468] [2023-08-31 04:08:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:08:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:24,149 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:24,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 04:08:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:08:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:24,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:24,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364778468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:24,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 04:08:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278509152] [2023-08-31 04:08:24,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:08:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:08:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:08:24,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:08:24,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1419 transitions, 38633 flow. Second operand has 18 states, 18 states have (on average 131.88888888888889) internal successors, (2374), 18 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:24,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:24,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:08:24,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:29,847 INFO L130 PetriNetUnfolder]: 3505/7160 cut-off events. [2023-08-31 04:08:29,847 INFO L131 PetriNetUnfolder]: For 178781/178781 co-relation queries the response was YES. [2023-08-31 04:08:29,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80428 conditions, 7160 events. 3505/7160 cut-off events. For 178781/178781 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59619 event pairs, 63 based on Foata normal form. 104/7263 useless extension candidates. Maximal degree in co-relation 79573. Up to 3604 conditions per place. [2023-08-31 04:08:29,936 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1299 selfloop transitions, 479 changer transitions 0/1778 dead transitions. [2023-08-31 04:08:29,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1778 transitions, 51366 flow [2023-08-31 04:08:29,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:08:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:08:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4316 transitions. [2023-08-31 04:08:29,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087121212121212 [2023-08-31 04:08:29,940 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4316 transitions. [2023-08-31 04:08:29,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4316 transitions. [2023-08-31 04:08:29,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:29,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4316 transitions. [2023-08-31 04:08:29,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 134.875) internal successors, (4316), 32 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:29,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 330.0) internal successors, (10890), 33 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:29,948 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 330.0) internal successors, (10890), 33 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:29,948 INFO L175 Difference]: Start difference. First operand has 503 places, 1419 transitions, 38633 flow. Second operand 32 states and 4316 transitions. [2023-08-31 04:08:29,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1778 transitions, 51366 flow [2023-08-31 04:08:33,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1778 transitions, 49269 flow, removed 599 selfloop flow, removed 16 redundant places. [2023-08-31 04:08:33,763 INFO L231 Difference]: Finished difference. Result has 532 places, 1605 transitions, 43960 flow [2023-08-31 04:08:33,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=36697, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=43960, PETRI_PLACES=532, PETRI_TRANSITIONS=1605} [2023-08-31 04:08:33,765 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 511 predicate places. [2023-08-31 04:08:33,766 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1605 transitions, 43960 flow [2023-08-31 04:08:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.88888888888889) internal successors, (2374), 18 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:33,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:33,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:33,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:33,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 04:08:33,972 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:33,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash -270434899, now seen corresponding path program 20 times [2023-08-31 04:08:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590616676] [2023-08-31 04:08:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590616676] [2023-08-31 04:08:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590616676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:34,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510654459] [2023-08-31 04:08:34,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:08:34,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:34,205 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:34,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 04:08:34,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:08:34,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:08:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:34,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:34,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510654459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:34,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:34,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-31 04:08:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692725295] [2023-08-31 04:08:34,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:34,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:08:34,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:08:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:08:34,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:08:34,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1605 transitions, 43960 flow. Second operand has 18 states, 18 states have (on average 131.72222222222223) internal successors, (2371), 18 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) [2023-08-31 04:08:34,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:34,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:08:34,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:43,037 INFO L130 PetriNetUnfolder]: 3754/7901 cut-off events. [2023-08-31 04:08:43,037 INFO L131 PetriNetUnfolder]: For 243786/243786 co-relation queries the response was YES. [2023-08-31 04:08:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89954 conditions, 7901 events. 3754/7901 cut-off events. For 243786/243786 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 68617 event pairs, 63 based on Foata normal form. 28/7928 useless extension candidates. Maximal degree in co-relation 89113. Up to 2313 conditions per place. [2023-08-31 04:08:43,140 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1102 selfloop transitions, 822 changer transitions 10/1934 dead transitions. [2023-08-31 04:08:43,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1934 transitions, 54906 flow [2023-08-31 04:08:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:08:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:08:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4624 transitions. [2023-08-31 04:08:43,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2023-08-31 04:08:43,144 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4624 transitions. [2023-08-31 04:08:43,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4624 transitions. [2023-08-31 04:08:43,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:43,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4624 transitions. [2023-08-31 04:08:43,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 136.0) internal successors, (4624), 34 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:43,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 330.0) internal successors, (11550), 35 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:43,152 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 330.0) internal successors, (11550), 35 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:43,152 INFO L175 Difference]: Start difference. First operand has 532 places, 1605 transitions, 43960 flow. Second operand 34 states and 4624 transitions. [2023-08-31 04:08:43,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1934 transitions, 54906 flow [2023-08-31 04:08:48,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1934 transitions, 53900 flow, removed 322 selfloop flow, removed 10 redundant places. [2023-08-31 04:08:48,539 INFO L231 Difference]: Finished difference. Result has 565 places, 1730 transitions, 49231 flow [2023-08-31 04:08:48,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=42970, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=707, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=49231, PETRI_PLACES=565, PETRI_TRANSITIONS=1730} [2023-08-31 04:08:48,541 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-08-31 04:08:48,541 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1730 transitions, 49231 flow [2023-08-31 04:08:48,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.72222222222223) internal successors, (2371), 18 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) [2023-08-31 04:08:48,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:48,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:48,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:48,742 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:48,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1661449927, now seen corresponding path program 21 times [2023-08-31 04:08:48,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:48,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316581346] [2023-08-31 04:08:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:48,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316581346] [2023-08-31 04:08:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316581346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986021242] [2023-08-31 04:08:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:08:48,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:48,906 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:48,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 04:08:49,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:08:49,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:08:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:49,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986021242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:49,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:49,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-31 04:08:49,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461297915] [2023-08-31 04:08:49,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:08:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:08:49,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:08:49,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:08:49,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1730 transitions, 49231 flow. Second operand has 16 states, 16 states have (on average 131.9375) internal successors, (2111), 16 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:49,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:49,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:08:49,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:54,572 INFO L130 PetriNetUnfolder]: 4087/8456 cut-off events. [2023-08-31 04:08:54,572 INFO L131 PetriNetUnfolder]: For 283794/283794 co-relation queries the response was YES. [2023-08-31 04:08:54,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101453 conditions, 8456 events. 4087/8456 cut-off events. For 283794/283794 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 73232 event pairs, 81 based on Foata normal form. 20/8475 useless extension candidates. Maximal degree in co-relation 100811. Up to 4894 conditions per place. [2023-08-31 04:08:54,683 INFO L137 encePairwiseOnDemand]: 325/330 looper letters, 1614 selfloop transitions, 398 changer transitions 0/2012 dead transitions. [2023-08-31 04:08:54,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 2012 transitions, 62058 flow [2023-08-31 04:08:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:08:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:08:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1904 transitions. [2023-08-31 04:08:54,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2023-08-31 04:08:54,685 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1904 transitions. [2023-08-31 04:08:54,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1904 transitions. [2023-08-31 04:08:54,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:54,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1904 transitions. [2023-08-31 04:08:54,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:54,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:54,688 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 330.0) internal successors, (4950), 15 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:54,688 INFO L175 Difference]: Start difference. First operand has 565 places, 1730 transitions, 49231 flow. Second operand 14 states and 1904 transitions. [2023-08-31 04:08:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 2012 transitions, 62058 flow [2023-08-31 04:09:01,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 2012 transitions, 61133 flow, removed 175 selfloop flow, removed 16 redundant places. [2023-08-31 04:09:01,180 INFO L231 Difference]: Finished difference. Result has 568 places, 1870 transitions, 54989 flow [2023-08-31 04:09:01,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=48311, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=54989, PETRI_PLACES=568, PETRI_TRANSITIONS=1870} [2023-08-31 04:09:01,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 547 predicate places. [2023-08-31 04:09:01,182 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1870 transitions, 54989 flow [2023-08-31 04:09:01,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.9375) internal successors, (2111), 16 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:01,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:01,183 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:01,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 04:09:01,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 04:09:01,387 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:01,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1902503334, now seen corresponding path program 22 times [2023-08-31 04:09:01,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528755720] [2023-08-31 04:09:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:01,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:01,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528755720] [2023-08-31 04:09:01,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528755720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:01,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276307304] [2023-08-31 04:09:01,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:09:01,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:01,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:01,569 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:01,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 04:09:01,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:09:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:09:01,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:09:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:01,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:01,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276307304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:01,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:01,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:09:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314004252] [2023-08-31 04:09:01,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:01,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:09:01,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:01,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:09:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:09:02,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:09:02,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1870 transitions, 54989 flow. Second operand has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:02,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:02,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:09:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:08,015 INFO L130 PetriNetUnfolder]: 4131/8536 cut-off events. [2023-08-31 04:09:08,015 INFO L131 PetriNetUnfolder]: For 285977/285977 co-relation queries the response was YES. [2023-08-31 04:09:08,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103197 conditions, 8536 events. 4131/8536 cut-off events. For 285977/285977 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 74177 event pairs, 94 based on Foata normal form. 12/8547 useless extension candidates. Maximal degree in co-relation 102527. Up to 4994 conditions per place. [2023-08-31 04:09:08,127 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1008 selfloop transitions, 914 changer transitions 1/1923 dead transitions. [2023-08-31 04:09:08,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 1923 transitions, 59657 flow [2023-08-31 04:09:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 04:09:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 04:09:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2043 transitions. [2023-08-31 04:09:08,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127272727272727 [2023-08-31 04:09:08,129 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2043 transitions. [2023-08-31 04:09:08,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2043 transitions. [2023-08-31 04:09:08,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:08,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2043 transitions. [2023-08-31 04:09:08,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.2) internal successors, (2043), 15 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:08,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:08,133 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 330.0) internal successors, (5280), 16 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:08,133 INFO L175 Difference]: Start difference. First operand has 568 places, 1870 transitions, 54989 flow. Second operand 15 states and 2043 transitions. [2023-08-31 04:09:08,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 1923 transitions, 59657 flow [2023-08-31 04:09:14,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1923 transitions, 59439 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-31 04:09:14,608 INFO L231 Difference]: Finished difference. Result has 583 places, 1882 transitions, 56988 flow [2023-08-31 04:09:14,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=54782, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=904, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=56988, PETRI_PLACES=583, PETRI_TRANSITIONS=1882} [2023-08-31 04:09:14,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 562 predicate places. [2023-08-31 04:09:14,610 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1882 transitions, 56988 flow [2023-08-31 04:09:14,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.41176470588235) internal successors, (2251), 17 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:14,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:14,611 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:14,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 04:09:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 04:09:14,817 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:14,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -692008528, now seen corresponding path program 23 times [2023-08-31 04:09:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:14,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283060076] [2023-08-31 04:09:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283060076] [2023-08-31 04:09:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283060076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102799458] [2023-08-31 04:09:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:09:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:15,024 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:15,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 04:09:15,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:09:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:09:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:09:15,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102799458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:15,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:15,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 04:09:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656700192] [2023-08-31 04:09:15,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:09:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:09:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:09:15,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:09:15,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1882 transitions, 56988 flow. Second operand has 18 states, 18 states have (on average 132.11111111111111) internal successors, (2378), 18 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:15,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:15,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:09:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:22,742 INFO L130 PetriNetUnfolder]: 4281/8836 cut-off events. [2023-08-31 04:09:22,742 INFO L131 PetriNetUnfolder]: For 315956/315956 co-relation queries the response was YES. [2023-08-31 04:09:23,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108376 conditions, 8836 events. 4281/8836 cut-off events. For 315956/315956 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 77331 event pairs, 56 based on Foata normal form. 46/8881 useless extension candidates. Maximal degree in co-relation 107646. Up to 2996 conditions per place. [2023-08-31 04:09:23,142 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 990 selfloop transitions, 1036 changer transitions 1/2027 dead transitions. [2023-08-31 04:09:23,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 2027 transitions, 63628 flow [2023-08-31 04:09:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:09:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:09:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4596 transitions. [2023-08-31 04:09:23,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962566844919784 [2023-08-31 04:09:23,147 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4596 transitions. [2023-08-31 04:09:23,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4596 transitions. [2023-08-31 04:09:23,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:23,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4596 transitions. [2023-08-31 04:09:23,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 135.1764705882353) internal successors, (4596), 34 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:23,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 330.0) internal successors, (11550), 35 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:23,156 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 330.0) internal successors, (11550), 35 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:23,157 INFO L175 Difference]: Start difference. First operand has 583 places, 1882 transitions, 56988 flow. Second operand 34 states and 4596 transitions. [2023-08-31 04:09:23,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 2027 transitions, 63628 flow [2023-08-31 04:09:30,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 2027 transitions, 62811 flow, removed 83 selfloop flow, removed 7 redundant places. [2023-08-31 04:09:30,531 INFO L231 Difference]: Finished difference. Result has 618 places, 1942 transitions, 60151 flow [2023-08-31 04:09:30,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=55950, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=872, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=60151, PETRI_PLACES=618, PETRI_TRANSITIONS=1942} [2023-08-31 04:09:30,533 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 597 predicate places. [2023-08-31 04:09:30,533 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1942 transitions, 60151 flow [2023-08-31 04:09:30,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 132.11111111111111) internal successors, (2378), 18 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:30,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:30,534 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:30,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 04:09:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:30,740 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:30,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -662084278, now seen corresponding path program 24 times [2023-08-31 04:09:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:30,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904431201] [2023-08-31 04:09:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:09:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904431201] [2023-08-31 04:09:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904431201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:30,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364257009] [2023-08-31 04:09:30,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:09:30,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:30,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:30,905 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:30,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 04:09:31,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:09:31,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:09:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:09:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:31,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364257009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:31,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:31,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-08-31 04:09:31,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198204718] [2023-08-31 04:09:31,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:31,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:09:31,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:09:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:09:31,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:09:31,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1942 transitions, 60151 flow. Second operand has 17 states, 17 states have (on average 131.8235294117647) internal successors, (2241), 17 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:31,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:31,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:09:31,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:39,336 INFO L130 PetriNetUnfolder]: 4440/9135 cut-off events. [2023-08-31 04:09:39,336 INFO L131 PetriNetUnfolder]: For 360642/360642 co-relation queries the response was YES. [2023-08-31 04:09:39,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115506 conditions, 9135 events. 4440/9135 cut-off events. For 360642/360642 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 80167 event pairs, 117 based on Foata normal form. 32/9166 useless extension candidates. Maximal degree in co-relation 114804. Up to 7044 conditions per place. [2023-08-31 04:09:39,477 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1525 selfloop transitions, 541 changer transitions 1/2067 dead transitions. [2023-08-31 04:09:39,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 2067 transitions, 67158 flow [2023-08-31 04:09:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:09:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:09:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3263 transitions. [2023-08-31 04:09:39,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41199494949494947 [2023-08-31 04:09:39,479 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3263 transitions. [2023-08-31 04:09:39,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3263 transitions. [2023-08-31 04:09:39,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:39,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3263 transitions. [2023-08-31 04:09:39,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 135.95833333333334) internal successors, (3263), 24 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:39,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:39,488 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:39,488 INFO L175 Difference]: Start difference. First operand has 618 places, 1942 transitions, 60151 flow. Second operand 24 states and 3263 transitions. [2023-08-31 04:09:39,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 2067 transitions, 67158 flow [2023-08-31 04:09:47,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 2067 transitions, 64031 flow, removed 590 selfloop flow, removed 19 redundant places. [2023-08-31 04:09:47,578 INFO L231 Difference]: Finished difference. Result has 633 places, 1981 transitions, 60306 flow [2023-08-31 04:09:47,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=57568, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=60306, PETRI_PLACES=633, PETRI_TRANSITIONS=1981} [2023-08-31 04:09:47,580 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 612 predicate places. [2023-08-31 04:09:47,580 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1981 transitions, 60306 flow [2023-08-31 04:09:47,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 131.8235294117647) internal successors, (2241), 17 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:47,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:09:47,580 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:09:47,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 04:09:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:47,787 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:09:47,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:09:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash 455510348, now seen corresponding path program 25 times [2023-08-31 04:09:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:09:47,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465581718] [2023-08-31 04:09:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:09:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:09:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:09:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465581718] [2023-08-31 04:09:48,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465581718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:09:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503916314] [2023-08-31 04:09:48,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:09:48,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:09:48,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:09:48,029 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:09:48,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 04:09:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:09:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:09:48,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:09:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:48,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:09:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:09:48,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503916314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:09:48,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:09:48,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:09:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43952712] [2023-08-31 04:09:48,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:09:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:09:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:09:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:09:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:09:48,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:09:48,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1981 transitions, 60306 flow. Second operand has 17 states, 17 states have (on average 132.1764705882353) internal successors, (2247), 17 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:48,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:09:48,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:09:48,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:09:56,953 INFO L130 PetriNetUnfolder]: 4735/9843 cut-off events. [2023-08-31 04:09:56,954 INFO L131 PetriNetUnfolder]: For 396000/396000 co-relation queries the response was YES. [2023-08-31 04:09:57,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122915 conditions, 9843 events. 4735/9843 cut-off events. For 396000/396000 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 87930 event pairs, 70 based on Foata normal form. 74/9916 useless extension candidates. Maximal degree in co-relation 122204. Up to 4632 conditions per place. [2023-08-31 04:09:57,106 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1368 selfloop transitions, 811 changer transitions 7/2186 dead transitions. [2023-08-31 04:09:57,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 2186 transitions, 69184 flow [2023-08-31 04:09:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:09:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:09:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3807 transitions. [2023-08-31 04:09:57,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412012987012987 [2023-08-31 04:09:57,116 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3807 transitions. [2023-08-31 04:09:57,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3807 transitions. [2023-08-31 04:09:57,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:09:57,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3807 transitions. [2023-08-31 04:09:57,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 135.96428571428572) internal successors, (3807), 28 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:57,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:57,123 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:09:57,123 INFO L175 Difference]: Start difference. First operand has 633 places, 1981 transitions, 60306 flow. Second operand 28 states and 3807 transitions. [2023-08-31 04:09:57,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 2186 transitions, 69184 flow [2023-08-31 04:10:06,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 2186 transitions, 68552 flow, removed 164 selfloop flow, removed 9 redundant places. [2023-08-31 04:10:06,198 INFO L231 Difference]: Finished difference. Result has 658 places, 2075 transitions, 65142 flow [2023-08-31 04:10:06,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=59447, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=716, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=65142, PETRI_PLACES=658, PETRI_TRANSITIONS=2075} [2023-08-31 04:10:06,200 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 637 predicate places. [2023-08-31 04:10:06,200 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 2075 transitions, 65142 flow [2023-08-31 04:10:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.1764705882353) internal successors, (2247), 17 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:06,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:10:06,201 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:10:06,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 04:10:06,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:06,402 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:10:06,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:10:06,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1301645282, now seen corresponding path program 26 times [2023-08-31 04:10:06,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:10:06,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779545203] [2023-08-31 04:10:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:10:06,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:10:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:10:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:06,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:10:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779545203] [2023-08-31 04:10:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779545203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:10:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21549961] [2023-08-31 04:10:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:10:06,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:10:06,565 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:10:06,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 04:10:06,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:10:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:10:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:10:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:10:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:10:06,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:10:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:10:06,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21549961] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:10:06,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:10:06,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-31 04:10:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700779080] [2023-08-31 04:10:06,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:10:06,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:10:06,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:10:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:10:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:10:07,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:10:07,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 2075 transitions, 65142 flow. Second operand has 18 states, 18 states have (on average 131.77777777777777) internal successors, (2372), 18 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:07,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:10:07,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:10:07,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:10:15,951 INFO L130 PetriNetUnfolder]: 4814/10005 cut-off events. [2023-08-31 04:10:15,951 INFO L131 PetriNetUnfolder]: For 442262/442262 co-relation queries the response was YES. [2023-08-31 04:10:16,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129145 conditions, 10005 events. 4814/10005 cut-off events. For 442262/442262 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 89789 event pairs, 1357 based on Foata normal form. 14/10018 useless extension candidates. Maximal degree in co-relation 128621. Up to 5738 conditions per place. [2023-08-31 04:10:16,115 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1808 selfloop transitions, 354 changer transitions 20/2182 dead transitions. [2023-08-31 04:10:16,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 2182 transitions, 72174 flow [2023-08-31 04:10:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 04:10:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 04:10:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2834 transitions. [2023-08-31 04:10:16,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40894660894660895 [2023-08-31 04:10:16,117 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2834 transitions. [2023-08-31 04:10:16,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2834 transitions. [2023-08-31 04:10:16,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:10:16,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2834 transitions. [2023-08-31 04:10:16,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 134.95238095238096) internal successors, (2834), 21 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:16,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:16,123 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 330.0) internal successors, (7260), 22 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:16,123 INFO L175 Difference]: Start difference. First operand has 658 places, 2075 transitions, 65142 flow. Second operand 21 states and 2834 transitions. [2023-08-31 04:10:16,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 2182 transitions, 72174 flow [2023-08-31 04:10:26,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 2182 transitions, 69690 flow, removed 930 selfloop flow, removed 27 redundant places. [2023-08-31 04:10:26,462 INFO L231 Difference]: Finished difference. Result has 658 places, 2102 transitions, 65256 flow [2023-08-31 04:10:26,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=63028, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=65256, PETRI_PLACES=658, PETRI_TRANSITIONS=2102} [2023-08-31 04:10:26,464 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 637 predicate places. [2023-08-31 04:10:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 2102 transitions, 65256 flow [2023-08-31 04:10:26,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.77777777777777) internal successors, (2372), 18 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:26,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:10:26,465 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:10:26,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-31 04:10:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:26,666 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:10:26,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:10:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1635421574, now seen corresponding path program 27 times [2023-08-31 04:10:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:10:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941095078] [2023-08-31 04:10:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:10:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:10:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:10:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:26,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:10:26,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941095078] [2023-08-31 04:10:26,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941095078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:10:26,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561018428] [2023-08-31 04:10:26,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:10:26,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:26,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:10:26,861 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:10:26,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 04:10:27,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 04:10:27,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:10:27,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:10:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:10:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:27,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:10:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:27,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561018428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:10:27,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:10:27,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 04:10:27,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956736293] [2023-08-31 04:10:27,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:10:27,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:10:27,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:10:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:10:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:10:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:10:27,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 2102 transitions, 65256 flow. Second operand has 18 states, 18 states have (on average 132.0) internal successors, (2376), 18 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:27,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:10:27,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:10:27,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:10:36,294 INFO L130 PetriNetUnfolder]: 4837/10041 cut-off events. [2023-08-31 04:10:36,295 INFO L131 PetriNetUnfolder]: For 434058/434058 co-relation queries the response was YES. [2023-08-31 04:10:36,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127313 conditions, 10041 events. 4837/10041 cut-off events. For 434058/434058 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 90152 event pairs, 1368 based on Foata normal form. 20/10060 useless extension candidates. Maximal degree in co-relation 126920. Up to 6488 conditions per place. [2023-08-31 04:10:36,445 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1744 selfloop transitions, 451 changer transitions 0/2195 dead transitions. [2023-08-31 04:10:36,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 2195 transitions, 71388 flow [2023-08-31 04:10:36,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:10:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:10:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3253 transitions. [2023-08-31 04:10:36,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107323232323232 [2023-08-31 04:10:36,448 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3253 transitions. [2023-08-31 04:10:36,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3253 transitions. [2023-08-31 04:10:36,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:10:36,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3253 transitions. [2023-08-31 04:10:36,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 135.54166666666666) internal successors, (3253), 24 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:36,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:36,454 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:36,454 INFO L175 Difference]: Start difference. First operand has 658 places, 2102 transitions, 65256 flow. Second operand 24 states and 3253 transitions. [2023-08-31 04:10:36,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 2195 transitions, 71388 flow [2023-08-31 04:10:44,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 2195 transitions, 71033 flow, removed 82 selfloop flow, removed 6 redundant places. [2023-08-31 04:10:44,998 INFO L231 Difference]: Finished difference. Result has 678 places, 2127 transitions, 66991 flow [2023-08-31 04:10:44,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=64817, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=66991, PETRI_PLACES=678, PETRI_TRANSITIONS=2127} [2023-08-31 04:10:44,999 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 657 predicate places. [2023-08-31 04:10:44,999 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2127 transitions, 66991 flow [2023-08-31 04:10:45,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 132.0) internal successors, (2376), 18 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:45,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:10:45,000 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:10:45,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 04:10:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-31 04:10:45,201 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:10:45,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:10:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1077996454, now seen corresponding path program 28 times [2023-08-31 04:10:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:10:45,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447727692] [2023-08-31 04:10:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:10:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:10:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:10:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:10:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447727692] [2023-08-31 04:10:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447727692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:10:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634476499] [2023-08-31 04:10:45,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:10:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:10:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:10:45,369 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:10:45,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 04:10:45,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:10:45,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:10:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:10:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:10:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:45,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:10:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:10:45,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634476499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:10:45,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:10:45,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-31 04:10:45,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603242782] [2023-08-31 04:10:45,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:10:45,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:10:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:10:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:10:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:10:45,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:10:45,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2127 transitions, 66991 flow. Second operand has 16 states, 16 states have (on average 132.5) internal successors, (2120), 16 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:45,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:10:45,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:10:45,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:10:54,248 INFO L130 PetriNetUnfolder]: 4921/10177 cut-off events. [2023-08-31 04:10:54,249 INFO L131 PetriNetUnfolder]: For 458027/458027 co-relation queries the response was YES. [2023-08-31 04:10:54,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131074 conditions, 10177 events. 4921/10177 cut-off events. For 458027/458027 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 91266 event pairs, 1865 based on Foata normal form. 44/10220 useless extension candidates. Maximal degree in co-relation 130658. Up to 9328 conditions per place. [2023-08-31 04:10:54,421 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1947 selfloop transitions, 275 changer transitions 0/2222 dead transitions. [2023-08-31 04:10:54,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 2222 transitions, 73349 flow [2023-08-31 04:10:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:10:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:10:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3113 transitions. [2023-08-31 04:10:54,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101449275362319 [2023-08-31 04:10:54,424 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3113 transitions. [2023-08-31 04:10:54,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3113 transitions. [2023-08-31 04:10:54,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:10:54,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3113 transitions. [2023-08-31 04:10:54,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 135.34782608695653) internal successors, (3113), 23 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:54,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:54,432 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:10:54,432 INFO L175 Difference]: Start difference. First operand has 678 places, 2127 transitions, 66991 flow. Second operand 23 states and 3113 transitions. [2023-08-31 04:10:54,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 2222 transitions, 73349 flow [2023-08-31 04:11:03,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 2222 transitions, 72287 flow, removed 227 selfloop flow, removed 16 redundant places. [2023-08-31 04:11:03,424 INFO L231 Difference]: Finished difference. Result has 692 places, 2155 transitions, 67765 flow [2023-08-31 04:11:03,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=65730, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=67765, PETRI_PLACES=692, PETRI_TRANSITIONS=2155} [2023-08-31 04:11:03,426 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 671 predicate places. [2023-08-31 04:11:03,426 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 2155 transitions, 67765 flow [2023-08-31 04:11:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 132.5) internal successors, (2120), 16 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:03,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:03,427 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:03,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:03,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:03,627 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:03,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash -965583348, now seen corresponding path program 29 times [2023-08-31 04:11:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436394076] [2023-08-31 04:11:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:03,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436394076] [2023-08-31 04:11:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436394076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339423011] [2023-08-31 04:11:03,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:11:03,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:03,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:03,773 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:03,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 04:11:03,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:11:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:11:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:04,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:04,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339423011] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:04,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:04,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-31 04:11:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702375591] [2023-08-31 04:11:04,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:04,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:11:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:11:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:11:04,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:11:04,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 2155 transitions, 67765 flow. Second operand has 16 states, 16 states have (on average 132.1875) internal successors, (2115), 16 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:04,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:04,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:11:04,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:12,784 INFO L130 PetriNetUnfolder]: 5059/10437 cut-off events. [2023-08-31 04:11:12,785 INFO L131 PetriNetUnfolder]: For 479358/479358 co-relation queries the response was YES. [2023-08-31 04:11:12,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135023 conditions, 10437 events. 5059/10437 cut-off events. For 479358/479358 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 93862 event pairs, 1972 based on Foata normal form. 46/10482 useless extension candidates. Maximal degree in co-relation 134617. Up to 9819 conditions per place. [2023-08-31 04:11:12,949 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 2098 selfloop transitions, 193 changer transitions 0/2291 dead transitions. [2023-08-31 04:11:12,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 2291 transitions, 75531 flow [2023-08-31 04:11:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:11:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:11:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3931 transitions. [2023-08-31 04:11:12,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107628004179728 [2023-08-31 04:11:12,953 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3931 transitions. [2023-08-31 04:11:12,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3931 transitions. [2023-08-31 04:11:12,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:12,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3931 transitions. [2023-08-31 04:11:12,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 135.55172413793105) internal successors, (3931), 29 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:12,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:12,963 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:12,963 INFO L175 Difference]: Start difference. First operand has 692 places, 2155 transitions, 67765 flow. Second operand 29 states and 3931 transitions. [2023-08-31 04:11:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 2291 transitions, 75531 flow [2023-08-31 04:11:22,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 2291 transitions, 75082 flow, removed 172 selfloop flow, removed 8 redundant places. [2023-08-31 04:11:22,195 INFO L231 Difference]: Finished difference. Result has 728 places, 2203 transitions, 69742 flow [2023-08-31 04:11:22,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=67265, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=69742, PETRI_PLACES=728, PETRI_TRANSITIONS=2203} [2023-08-31 04:11:22,197 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 707 predicate places. [2023-08-31 04:11:22,197 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 2203 transitions, 69742 flow [2023-08-31 04:11:22,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 132.1875) internal successors, (2115), 16 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:22,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:22,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:22,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:22,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:22,399 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:22,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash -88685944, now seen corresponding path program 30 times [2023-08-31 04:11:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:22,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759976917] [2023-08-31 04:11:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:22,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759976917] [2023-08-31 04:11:22,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759976917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:22,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954617685] [2023-08-31 04:11:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:11:22,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:22,637 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:22,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 04:11:22,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:11:22,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:11:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:22,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954617685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:23,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:23,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-31 04:11:23,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581982798] [2023-08-31 04:11:23,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:23,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:11:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:11:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:11:23,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:11:23,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 2203 transitions, 69742 flow. Second operand has 19 states, 19 states have (on average 132.05263157894737) internal successors, (2509), 19 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:23,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:23,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:11:23,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:33,074 INFO L130 PetriNetUnfolder]: 5168/10638 cut-off events. [2023-08-31 04:11:33,074 INFO L131 PetriNetUnfolder]: For 516659/516659 co-relation queries the response was YES. [2023-08-31 04:11:33,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140044 conditions, 10638 events. 5168/10638 cut-off events. For 516659/516659 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 95810 event pairs, 1402 based on Foata normal form. 42/10679 useless extension candidates. Maximal degree in co-relation 139828. Up to 6777 conditions per place. [2023-08-31 04:11:33,240 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1780 selfloop transitions, 566 changer transitions 1/2347 dead transitions. [2023-08-31 04:11:33,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 2347 transitions, 78210 flow [2023-08-31 04:11:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:11:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:11:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3936 transitions. [2023-08-31 04:11:33,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41128526645768027 [2023-08-31 04:11:33,243 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3936 transitions. [2023-08-31 04:11:33,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3936 transitions. [2023-08-31 04:11:33,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:33,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3936 transitions. [2023-08-31 04:11:33,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 135.72413793103448) internal successors, (3936), 29 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:33,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:33,253 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 330.0) internal successors, (9900), 30 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:33,253 INFO L175 Difference]: Start difference. First operand has 728 places, 2203 transitions, 69742 flow. Second operand 29 states and 3936 transitions. [2023-08-31 04:11:33,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 2347 transitions, 78210 flow [2023-08-31 04:11:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 2347 transitions, 77270 flow, removed 361 selfloop flow, removed 9 redundant places. [2023-08-31 04:11:43,475 INFO L231 Difference]: Finished difference. Result has 752 places, 2262 transitions, 73228 flow [2023-08-31 04:11:43,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=68617, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=73228, PETRI_PLACES=752, PETRI_TRANSITIONS=2262} [2023-08-31 04:11:43,477 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 731 predicate places. [2023-08-31 04:11:43,477 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 2262 transitions, 73228 flow [2023-08-31 04:11:43,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 132.05263157894737) internal successors, (2509), 19 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:43,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:43,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:43,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:43,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 04:11:43,678 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:43,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2029900146, now seen corresponding path program 31 times [2023-08-31 04:11:43,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:43,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742511292] [2023-08-31 04:11:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:43,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742511292] [2023-08-31 04:11:43,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742511292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56089567] [2023-08-31 04:11:43,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:11:43,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:43,853 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:43,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 04:11:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:43,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:11:43,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:44,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:11:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56089567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:44,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:44,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:11:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504658405] [2023-08-31 04:11:44,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:11:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:11:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:11:44,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:11:44,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 2262 transitions, 73228 flow. Second operand has 17 states, 17 states have (on average 132.05882352941177) internal successors, (2245), 17 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:44,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:44,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:11:44,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:54,936 INFO L130 PetriNetUnfolder]: 5409/11143 cut-off events. [2023-08-31 04:11:54,936 INFO L131 PetriNetUnfolder]: For 578133/578133 co-relation queries the response was YES. [2023-08-31 04:11:55,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148940 conditions, 11143 events. 5409/11143 cut-off events. For 578133/578133 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 101042 event pairs, 1496 based on Foata normal form. 78/11220 useless extension candidates. Maximal degree in co-relation 148717. Up to 7011 conditions per place. [2023-08-31 04:11:55,131 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 1911 selfloop transitions, 511 changer transitions 1/2423 dead transitions. [2023-08-31 04:11:55,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 2423 transitions, 82728 flow [2023-08-31 04:11:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:11:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:11:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3253 transitions. [2023-08-31 04:11:55,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107323232323232 [2023-08-31 04:11:55,134 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3253 transitions. [2023-08-31 04:11:55,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3253 transitions. [2023-08-31 04:11:55,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:55,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3253 transitions. [2023-08-31 04:11:55,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 135.54166666666666) internal successors, (3253), 24 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,143 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 330.0) internal successors, (8250), 25 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:55,143 INFO L175 Difference]: Start difference. First operand has 752 places, 2262 transitions, 73228 flow. Second operand 24 states and 3253 transitions. [2023-08-31 04:11:55,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 2423 transitions, 82728 flow [2023-08-31 04:12:06,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 2423 transitions, 80990 flow, removed 799 selfloop flow, removed 9 redundant places. [2023-08-31 04:12:06,382 INFO L231 Difference]: Finished difference. Result has 775 places, 2350 transitions, 76904 flow [2023-08-31 04:12:06,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=71467, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=76904, PETRI_PLACES=775, PETRI_TRANSITIONS=2350} [2023-08-31 04:12:06,385 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 754 predicate places. [2023-08-31 04:12:06,385 INFO L495 AbstractCegarLoop]: Abstraction has has 775 places, 2350 transitions, 76904 flow [2023-08-31 04:12:06,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.05882352941177) internal successors, (2245), 17 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:06,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:06,386 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:06,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-31 04:12:06,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 04:12:06,591 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:06,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash -332147418, now seen corresponding path program 32 times [2023-08-31 04:12:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:06,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300702652] [2023-08-31 04:12:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:06,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300702652] [2023-08-31 04:12:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300702652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206587314] [2023-08-31 04:12:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:12:06,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:06,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:06,742 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:06,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 04:12:06,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:12:06,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:12:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:12:06,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:12:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206587314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:07,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:07,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-31 04:12:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952639863] [2023-08-31 04:12:07,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:07,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:12:07,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:12:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:12:07,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:12:07,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 2350 transitions, 76904 flow. Second operand has 18 states, 18 states have (on average 131.88888888888889) internal successors, (2374), 18 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:07,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:07,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:12:07,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:18,853 INFO L130 PetriNetUnfolder]: 5744/11920 cut-off events. [2023-08-31 04:12:18,853 INFO L131 PetriNetUnfolder]: For 696453/696453 co-relation queries the response was YES. [2023-08-31 04:12:18,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162069 conditions, 11920 events. 5744/11920 cut-off events. For 696453/696453 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 109872 event pairs, 1425 based on Foata normal form. 34/11953 useless extension candidates. Maximal degree in co-relation 161837. Up to 6065 conditions per place. [2023-08-31 04:12:19,056 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 1851 selfloop transitions, 680 changer transitions 12/2543 dead transitions. [2023-08-31 04:12:19,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 2543 transitions, 87893 flow [2023-08-31 04:12:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:12:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:12:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3105 transitions. [2023-08-31 04:12:19,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2023-08-31 04:12:19,058 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3105 transitions. [2023-08-31 04:12:19,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3105 transitions. [2023-08-31 04:12:19,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:19,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3105 transitions. [2023-08-31 04:12:19,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 135.0) internal successors, (3105), 23 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:19,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:19,064 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 330.0) internal successors, (7920), 24 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:19,064 INFO L175 Difference]: Start difference. First operand has 775 places, 2350 transitions, 76904 flow. Second operand 23 states and 3105 transitions. [2023-08-31 04:12:19,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 2543 transitions, 87893 flow [2023-08-31 04:12:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 2543 transitions, 85938 flow, removed 777 selfloop flow, removed 21 redundant places. [2023-08-31 04:12:31,858 INFO L231 Difference]: Finished difference. Result has 782 places, 2453 transitions, 81317 flow [2023-08-31 04:12:31,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=74855, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=81317, PETRI_PLACES=782, PETRI_TRANSITIONS=2453} [2023-08-31 04:12:31,861 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 761 predicate places. [2023-08-31 04:12:31,861 INFO L495 AbstractCegarLoop]: Abstraction has has 782 places, 2453 transitions, 81317 flow [2023-08-31 04:12:31,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.88888888888889) internal successors, (2374), 18 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:31,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:31,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:31,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 04:12:32,067 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:32,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1864351080, now seen corresponding path program 33 times [2023-08-31 04:12:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:32,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816218301] [2023-08-31 04:12:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:32,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:32,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816218301] [2023-08-31 04:12:32,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816218301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:32,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059152666] [2023-08-31 04:12:32,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:12:32,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:32,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:32,227 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:32,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 04:12:32,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:12:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:32,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:12:32,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:12:32,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:12:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059152666] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:32,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:32,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-31 04:12:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330558889] [2023-08-31 04:12:32,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:12:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:12:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:12:32,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 330 [2023-08-31 04:12:32,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 2453 transitions, 81317 flow. Second operand has 18 states, 18 states have (on average 131.77777777777777) internal successors, (2372), 18 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:32,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:32,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 330 [2023-08-31 04:12:32,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:44,768 INFO L130 PetriNetUnfolder]: 5723/11847 cut-off events. [2023-08-31 04:12:44,768 INFO L131 PetriNetUnfolder]: For 735915/735915 co-relation queries the response was YES. [2023-08-31 04:12:44,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163729 conditions, 11847 events. 5723/11847 cut-off events. For 735915/735915 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 108817 event pairs, 1601 based on Foata normal form. 8/11854 useless extension candidates. Maximal degree in co-relation 163499. Up to 6585 conditions per place. [2023-08-31 04:12:44,981 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 2098 selfloop transitions, 400 changer transitions 8/2506 dead transitions. [2023-08-31 04:12:44,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2506 transitions, 87880 flow [2023-08-31 04:12:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 04:12:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 04:12:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2690 transitions. [2023-08-31 04:12:44,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075757575757576 [2023-08-31 04:12:44,984 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2690 transitions. [2023-08-31 04:12:44,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2690 transitions. [2023-08-31 04:12:44,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:44,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2690 transitions. [2023-08-31 04:12:44,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.5) internal successors, (2690), 20 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:44,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 330.0) internal successors, (6930), 21 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:44,989 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 330.0) internal successors, (6930), 21 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:44,989 INFO L175 Difference]: Start difference. First operand has 782 places, 2453 transitions, 81317 flow. Second operand 20 states and 2690 transitions. [2023-08-31 04:12:44,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2506 transitions, 87880 flow [2023-08-31 04:12:59,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 2506 transitions, 86061 flow, removed 649 selfloop flow, removed 15 redundant places. [2023-08-31 04:12:59,380 INFO L231 Difference]: Finished difference. Result has 786 places, 2447 transitions, 81046 flow [2023-08-31 04:12:59,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=79530, PETRI_DIFFERENCE_MINUEND_PLACES=764, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=81046, PETRI_PLACES=786, PETRI_TRANSITIONS=2447} [2023-08-31 04:12:59,383 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 765 predicate places. [2023-08-31 04:12:59,383 INFO L495 AbstractCegarLoop]: Abstraction has has 786 places, 2447 transitions, 81046 flow [2023-08-31 04:12:59,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.77777777777777) internal successors, (2372), 18 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:59,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:59,383 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:59,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:59,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-31 04:12:59,585 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:59,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash 267318248, now seen corresponding path program 34 times [2023-08-31 04:12:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957008573] [2023-08-31 04:12:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:59,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:13:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957008573] [2023-08-31 04:13:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957008573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:00,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758785768] [2023-08-31 04:13:00,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:13:00,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:00,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:00,660 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:13:00,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 04:13:00,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:13:00,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:13:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:13:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:13:00,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:13:01,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:01,034 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:13:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:01,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:01,082 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1314 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1314) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) is different from false [2023-08-31 04:13:01,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:01,112 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-31 04:13:01,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:01,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-31 04:13:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 04:13:01,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758785768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:01,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:01,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 22 [2023-08-31 04:13:01,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16601241] [2023-08-31 04:13:01,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:01,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:13:01,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:01,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:13:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=425, Unknown=1, NotChecked=42, Total=552 [2023-08-31 04:13:01,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 330 [2023-08-31 04:13:01,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 786 places, 2447 transitions, 81046 flow. Second operand has 24 states, 24 states have (on average 101.75) internal successors, (2442), 24 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:01,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:01,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 330 [2023-08-31 04:13:01,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:12,348 INFO L130 PetriNetUnfolder]: 5736/11856 cut-off events. [2023-08-31 04:13:12,349 INFO L131 PetriNetUnfolder]: For 728510/728542 co-relation queries the response was YES. [2023-08-31 04:13:12,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164386 conditions, 11856 events. 5736/11856 cut-off events. For 728510/728542 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 108991 event pairs, 300 based on Foata normal form. 14/11843 useless extension candidates. Maximal degree in co-relation 164156. Up to 11061 conditions per place. [2023-08-31 04:13:12,600 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 2287 selfloop transitions, 202 changer transitions 18/2526 dead transitions. [2023-08-31 04:13:12,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 2526 transitions, 87746 flow [2023-08-31 04:13:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 04:13:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 04:13:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1782 transitions. [2023-08-31 04:13:12,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3176470588235294 [2023-08-31 04:13:12,602 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1782 transitions. [2023-08-31 04:13:12,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1782 transitions. [2023-08-31 04:13:12,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:12,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1782 transitions. [2023-08-31 04:13:12,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 104.82352941176471) internal successors, (1782), 17 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:12,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:12,777 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 330.0) internal successors, (5940), 18 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:12,777 INFO L175 Difference]: Start difference. First operand has 786 places, 2447 transitions, 81046 flow. Second operand 17 states and 1782 transitions. [2023-08-31 04:13:12,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 2526 transitions, 87746 flow [2023-08-31 04:13:25,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 2526 transitions, 87214 flow, removed 118 selfloop flow, removed 11 redundant places. [2023-08-31 04:13:26,048 INFO L231 Difference]: Finished difference. Result has 791 places, 2471 transitions, 81920 flow [2023-08-31 04:13:26,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=80545, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=81920, PETRI_PLACES=791, PETRI_TRANSITIONS=2471} [2023-08-31 04:13:26,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 770 predicate places. [2023-08-31 04:13:26,051 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 2471 transitions, 81920 flow [2023-08-31 04:13:26,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.75) internal successors, (2442), 24 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:26,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:26,051 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:26,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-31 04:13:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:26,257 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:26,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 167399933, now seen corresponding path program 35 times [2023-08-31 04:13:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021558833] [2023-08-31 04:13:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:26,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:13:28,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:28,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021558833] [2023-08-31 04:13:28,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021558833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:28,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985357521] [2023-08-31 04:13:28,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:13:28,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:28,384 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:13:28,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-31 04:13:28,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:13:28,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:13:28,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 04:13:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:28,843 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:13:28,941 INFO L321 Elim1Store]: treesize reduction 167, result has 28.0 percent of original size [2023-08-31 04:13:28,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 101 [2023-08-31 04:13:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:29,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:29,608 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:13:29,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:13:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985357521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:30,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:30,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-08-31 04:13:30,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109723470] [2023-08-31 04:13:30,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:30,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:13:30,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:13:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-08-31 04:13:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 330 [2023-08-31 04:13:32,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 2471 transitions, 81920 flow. Second operand has 27 states, 27 states have (on average 119.74074074074075) internal successors, (3233), 27 states have internal predecessors, (3233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:32,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:32,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 330 [2023-08-31 04:13:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:47,647 INFO L130 PetriNetUnfolder]: 6997/14697 cut-off events. [2023-08-31 04:13:47,647 INFO L131 PetriNetUnfolder]: For 962108/962140 co-relation queries the response was YES. [2023-08-31 04:13:47,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204395 conditions, 14697 events. 6997/14697 cut-off events. For 962108/962140 co-relation queries the response was YES. Maximal size of possible extension queue 1079. Compared 141724 event pairs, 527 based on Foata normal form. 55/14725 useless extension candidates. Maximal degree in co-relation 204161. Up to 10632 conditions per place. [2023-08-31 04:13:47,961 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 2406 selfloop transitions, 671 changer transitions 36/3132 dead transitions. [2023-08-31 04:13:47,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 3132 transitions, 109261 flow [2023-08-31 04:13:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 04:13:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 04:13:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3334 transitions. [2023-08-31 04:13:47,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741863075196408 [2023-08-31 04:13:47,965 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3334 transitions. [2023-08-31 04:13:47,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3334 transitions. [2023-08-31 04:13:47,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:47,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3334 transitions. [2023-08-31 04:13:47,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 123.48148148148148) internal successors, (3334), 27 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:47,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 330.0) internal successors, (9240), 28 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:47,974 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 330.0) internal successors, (9240), 28 states have internal predecessors, (9240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:47,974 INFO L175 Difference]: Start difference. First operand has 791 places, 2471 transitions, 81920 flow. Second operand 27 states and 3334 transitions. [2023-08-31 04:13:47,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 3132 transitions, 109261 flow [2023-08-31 04:14:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 799 places, 3132 transitions, 108178 flow, removed 65 selfloop flow, removed 10 redundant places. [2023-08-31 04:14:05,798 INFO L231 Difference]: Finished difference. Result has 812 places, 2845 transitions, 96897 flow [2023-08-31 04:14:05,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=80945, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=96897, PETRI_PLACES=812, PETRI_TRANSITIONS=2845} [2023-08-31 04:14:05,800 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2023-08-31 04:14:05,800 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2845 transitions, 96897 flow [2023-08-31 04:14:05,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 119.74074074074075) internal successors, (3233), 27 states have internal predecessors, (3233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:05,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:05,801 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:05,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-31 04:14:06,005 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:06,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash -756322799, now seen corresponding path program 36 times [2023-08-31 04:14:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:06,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968023548] [2023-08-31 04:14:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:06,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:09,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968023548] [2023-08-31 04:14:09,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968023548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779752461] [2023-08-31 04:14:09,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:14:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:09,689 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:14:09,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-31 04:14:09,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 04:14:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 04:14:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:10,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:10,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:14:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:10,709 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:14:10,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:14:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:14:11,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779752461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:11,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:11,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-31 04:14:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874363970] [2023-08-31 04:14:11,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:11,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 04:14:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 04:14:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-08-31 04:14:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 330 [2023-08-31 04:14:14,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2845 transitions, 96897 flow. Second operand has 26 states, 26 states have (on average 119.8076923076923) internal successors, (3115), 26 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:14,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:14,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 330 [2023-08-31 04:14:14,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:34,662 INFO L130 PetriNetUnfolder]: 7851/16643 cut-off events. [2023-08-31 04:14:34,662 INFO L131 PetriNetUnfolder]: For 1199810/1199842 co-relation queries the response was YES. [2023-08-31 04:14:34,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238969 conditions, 16643 events. 7851/16643 cut-off events. For 1199810/1199842 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 165692 event pairs, 574 based on Foata normal form. 19/16644 useless extension candidates. Maximal degree in co-relation 238723. Up to 12687 conditions per place. [2023-08-31 04:14:34,977 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 2637 selfloop transitions, 621 changer transitions 21/3298 dead transitions. [2023-08-31 04:14:34,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 3298 transitions, 119295 flow [2023-08-31 04:14:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:14:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:14:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3463 transitions. [2023-08-31 04:14:34,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747835497835498 [2023-08-31 04:14:34,980 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3463 transitions. [2023-08-31 04:14:34,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3463 transitions. [2023-08-31 04:14:34,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:34,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3463 transitions. [2023-08-31 04:14:34,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 123.67857142857143) internal successors, (3463), 28 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:34,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:34,987 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 330.0) internal successors, (9570), 29 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:34,987 INFO L175 Difference]: Start difference. First operand has 812 places, 2845 transitions, 96897 flow. Second operand 28 states and 3463 transitions. [2023-08-31 04:14:34,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 3298 transitions, 119295 flow [2023-08-31 04:15:00,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 3298 transitions, 117636 flow, removed 760 selfloop flow, removed 9 redundant places. [2023-08-31 04:15:00,142 INFO L231 Difference]: Finished difference. Result has 838 places, 3056 transitions, 105899 flow [2023-08-31 04:15:00,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=95378, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=105899, PETRI_PLACES=838, PETRI_TRANSITIONS=3056} [2023-08-31 04:15:00,146 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 817 predicate places. [2023-08-31 04:15:00,146 INFO L495 AbstractCegarLoop]: Abstraction has has 838 places, 3056 transitions, 105899 flow [2023-08-31 04:15:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 119.8076923076923) internal successors, (3115), 26 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:00,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:00,147 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:00,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:00,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-31 04:15:00,353 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:00,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1058848235, now seen corresponding path program 37 times [2023-08-31 04:15:00,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:00,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716207367] [2023-08-31 04:15:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716207367] [2023-08-31 04:15:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716207367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703905105] [2023-08-31 04:15:02,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:15:02,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:02,853 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:02,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-31 04:15:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 04:15:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:03,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:03,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:15:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:03,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:03,706 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:15:03,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:15:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:04,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703905105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:04,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:04,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-31 04:15:04,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929057351] [2023-08-31 04:15:04,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:04,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 04:15:04,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:04,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 04:15:04,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-08-31 04:15:06,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 330 [2023-08-31 04:15:06,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 3056 transitions, 105899 flow. Second operand has 26 states, 26 states have (on average 119.88461538461539) internal successors, (3117), 26 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:06,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:06,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 330 [2023-08-31 04:15:06,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:29,059 INFO L130 PetriNetUnfolder]: 8485/18005 cut-off events. [2023-08-31 04:15:29,060 INFO L131 PetriNetUnfolder]: For 1326844/1326876 co-relation queries the response was YES. [2023-08-31 04:15:29,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260741 conditions, 18005 events. 8485/18005 cut-off events. For 1326844/1326876 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 180797 event pairs, 712 based on Foata normal form. 24/18005 useless extension candidates. Maximal degree in co-relation 260487. Up to 14980 conditions per place. [2023-08-31 04:15:29,584 INFO L137 encePairwiseOnDemand]: 323/330 looper letters, 2796 selfloop transitions, 551 changer transitions 26/3392 dead transitions. [2023-08-31 04:15:29,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 3392 transitions, 123503 flow [2023-08-31 04:15:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 04:15:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 04:15:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3076 transitions. [2023-08-31 04:15:29,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728484848484849 [2023-08-31 04:15:29,588 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3076 transitions. [2023-08-31 04:15:29,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3076 transitions. [2023-08-31 04:15:29,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:29,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3076 transitions. [2023-08-31 04:15:29,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 123.04) internal successors, (3076), 25 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,595 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,595 INFO L175 Difference]: Start difference. First operand has 838 places, 3056 transitions, 105899 flow. Second operand 25 states and 3076 transitions. [2023-08-31 04:15:29,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 3392 transitions, 123503 flow [2023-08-31 04:15:57,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 3392 transitions, 121616 flow, removed 853 selfloop flow, removed 10 redundant places. [2023-08-31 04:15:57,258 INFO L231 Difference]: Finished difference. Result has 856 places, 3232 transitions, 112481 flow [2023-08-31 04:15:57,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=104012, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=112481, PETRI_PLACES=856, PETRI_TRANSITIONS=3232} [2023-08-31 04:15:57,261 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 835 predicate places. [2023-08-31 04:15:57,261 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 3232 transitions, 112481 flow [2023-08-31 04:15:57,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 119.88461538461539) internal successors, (3117), 26 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:57,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:57,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-31 04:15:57,471 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:57,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2120977277, now seen corresponding path program 38 times [2023-08-31 04:15:57,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:57,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316635453] [2023-08-31 04:15:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:57,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316635453] [2023-08-31 04:15:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316635453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834685882] [2023-08-31 04:15:59,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:15:59,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:59,676 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:59,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-31 04:15:59,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:15:59,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 04:15:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:00,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:16:00,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2023-08-31 04:16:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:16:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:00,669 INFO L321 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2023-08-31 04:16:00,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2023-08-31 04:16:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:16:01,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834685882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:01,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:01,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-31 04:16:01,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680480584] [2023-08-31 04:16:01,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:01,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 04:16:01,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 04:16:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-08-31 04:16:03,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 330 [2023-08-31 04:16:03,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 3232 transitions, 112481 flow. Second operand has 26 states, 26 states have (on average 120.8076923076923) internal successors, (3141), 26 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:03,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:03,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 330 [2023-08-31 04:16:03,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:16:38,889 INFO L130 PetriNetUnfolder]: 11744/25140 cut-off events. [2023-08-31 04:16:38,889 INFO L131 PetriNetUnfolder]: For 1804665/1804697 co-relation queries the response was YES. [2023-08-31 04:16:39,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363582 conditions, 25140 events. 11744/25140 cut-off events. For 1804665/1804697 co-relation queries the response was YES. Maximal size of possible extension queue 1835. Compared 268527 event pairs, 847 based on Foata normal form. 95/25197 useless extension candidates. Maximal degree in co-relation 363323. Up to 16693 conditions per place. [2023-08-31 04:16:39,579 INFO L137 encePairwiseOnDemand]: 324/330 looper letters, 3400 selfloop transitions, 1343 changer transitions 45/4807 dead transitions. [2023-08-31 04:16:39,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 878 places, 4807 transitions, 175387 flow [2023-08-31 04:16:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 04:16:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 04:16:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3109 transitions. [2023-08-31 04:16:39,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768484848484848 [2023-08-31 04:16:39,583 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3109 transitions. [2023-08-31 04:16:39,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3109 transitions. [2023-08-31 04:16:39,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:39,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3109 transitions. [2023-08-31 04:16:39,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 124.36) internal successors, (3109), 25 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:39,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:39,589 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 330.0) internal successors, (8580), 26 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:39,589 INFO L175 Difference]: Start difference. First operand has 856 places, 3232 transitions, 112481 flow. Second operand 25 states and 3109 transitions. [2023-08-31 04:16:39,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 878 places, 4807 transitions, 175387 flow [2023-08-31 04:17:31,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 869 places, 4807 transitions, 174101 flow, removed 597 selfloop flow, removed 9 redundant places. [2023-08-31 04:17:31,560 INFO L231 Difference]: Finished difference. Result has 884 places, 4280 transitions, 156420 flow [2023-08-31 04:17:31,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=330, PETRI_DIFFERENCE_MINUEND_FLOW=111195, PETRI_DIFFERENCE_MINUEND_PLACES=845, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=156420, PETRI_PLACES=884, PETRI_TRANSITIONS=4280} [2023-08-31 04:17:31,563 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 863 predicate places. [2023-08-31 04:17:31,563 INFO L495 AbstractCegarLoop]: Abstraction has has 884 places, 4280 transitions, 156420 flow [2023-08-31 04:17:31,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 120.8076923076923) internal successors, (3141), 26 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:31,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:31,564 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:31,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:31,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:31,770 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:31,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 948691963, now seen corresponding path program 39 times [2023-08-31 04:17:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151864474] [2023-08-31 04:17:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:31,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:17:33,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:33,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151864474] [2023-08-31 04:17:33,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151864474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:33,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580286770] [2023-08-31 04:17:33,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:17:33,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:33,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:33,989 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:33,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-31 04:17:34,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 04:17:34,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:34,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 04:17:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:34,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:17:34,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:17:34,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:17:34,651 INFO L321 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-08-31 04:17:34,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 48 [2023-08-31 04:17:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:17:34,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:35,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:35,289 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 490 treesize of output 286 [2023-08-31 04:17:35,653 INFO L321 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2023-08-31 04:17:35,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 756 treesize of output 927 [2023-08-31 04:17:36,228 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-31 04:17:36,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 612 treesize of output 708 [2023-08-31 04:17:36,852 INFO L321 Elim1Store]: treesize reduction 8, result has 97.1 percent of original size [2023-08-31 04:17:36,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 249 treesize of output 453 [2023-08-31 04:18:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:18:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580286770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:37,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:37,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2023-08-31 04:18:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29687144] [2023-08-31 04:18:37,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 04:18:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 04:18:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=909, Unknown=3, NotChecked=0, Total=1122 [2023-08-31 04:18:39,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 330 [2023-08-31 04:18:39,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 4280 transitions, 156420 flow. Second operand has 34 states, 34 states have (on average 98.58823529411765) internal successors, (3352), 34 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:39,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:39,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 330 [2023-08-31 04:18:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15