./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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 ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:12:57,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:12:57,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:12:57,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:12:57,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:12:57,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:12:57,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:12:57,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:12:57,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:12:57,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:12:57,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:12:57,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:12:57,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:12:57,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:12:57,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:12:57,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:12:57,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:12:57,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:12:57,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:12:58,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:12:58,003 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:12:58,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:12:58,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:12:58,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:12:58,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:12:58,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:12:58,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:12:58,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:12:58,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:12:58,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:12:58,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:12:58,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:12:58,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:12:58,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:12:58,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:12:58,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:12:58,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:12:58,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:12:58,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:12:58,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:12:58,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:12:58,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:12:58,019 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:12:58,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:12:58,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:12:58,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:12:58,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:12:58,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:12:58,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:12:58,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:12:58,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:12:58,050 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:12:58,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:12:58,051 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:12:58,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:12:58,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:12:58,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:12:58,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:12:58,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:12:58,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:12:58,052 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:12:58,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:12:58,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:12:58,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:12:58,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:12:58,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:12:58,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:12:58,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:12:58,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:12:58,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:12:58,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:12:58,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:12:58,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:12:58,054 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:12:58,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:12:58,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:12:58,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2022-07-12 10:12:58,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:12:58,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:12:58,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:12:58,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:12:58,294 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:12:58,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-07-12 10:12:58,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08d96110/f21b86d1dd26470f9ec4fb13be230f22/FLAG6e313de33 [2022-07-12 10:12:58,765 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:12:58,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-07-12 10:12:58,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08d96110/f21b86d1dd26470f9ec4fb13be230f22/FLAG6e313de33 [2022-07-12 10:12:59,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08d96110/f21b86d1dd26470f9ec4fb13be230f22 [2022-07-12 10:12:59,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:12:59,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:12:59,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:12:59,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:12:59,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:12:59,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4947a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59, skipping insertion in model container [2022-07-12 10:12:59,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:12:59,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:12:59,284 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-07-12 10:12:59,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:12:59,513 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:12:59,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-07-12 10:12:59,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:12:59,589 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:12:59,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59 WrapperNode [2022-07-12 10:12:59,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:12:59,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:12:59,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:12:59,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:12:59,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,623 INFO L137 Inliner]: procedures = 364, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-12 10:12:59,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:12:59,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:12:59,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:12:59,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:12:59,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:12:59,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:12:59,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:12:59,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:12:59,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (1/1) ... [2022-07-12 10:12:59,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:12:59,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:12:59,683 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) [2022-07-12 10:12:59,712 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 [2022-07-12 10:12:59,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:12:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:12:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:12:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:12:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:12:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:12:59,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-07-12 10:12:59,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-07-12 10:12:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:12:59,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:12:59,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:12:59,729 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:12:59,814 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:12:59,816 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:12:59,964 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:12:59,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:12:59,969 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:12:59,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:12:59 BoogieIcfgContainer [2022-07-12 10:12:59,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:12:59,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:12:59,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:12:59,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:12:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:12:59" (1/3) ... [2022-07-12 10:12:59,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eadbf67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:12:59, skipping insertion in model container [2022-07-12 10:12:59,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:12:59" (2/3) ... [2022-07-12 10:12:59,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eadbf67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:12:59, skipping insertion in model container [2022-07-12 10:12:59,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:12:59" (3/3) ... [2022-07-12 10:12:59,977 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-07-12 10:12:59,981 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:12:59,988 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:12:59,988 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:12:59,988 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:13:00,026 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:13:00,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 97 transitions, 202 flow [2022-07-12 10:13:00,116 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2022-07-12 10:13:00,117 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:13:00,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-07-12 10:13:00,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 97 transitions, 202 flow [2022-07-12 10:13:00,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 86 transitions, 178 flow [2022-07-12 10:13:00,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:00,144 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ee6e952, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35a1dfe6 [2022-07-12 10:13:00,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:13:00,165 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-12 10:13:00,165 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:13:00,166 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:00,166 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:00,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -137135436, now seen corresponding path program 1 times [2022-07-12 10:13:00,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:00,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75065789] [2022-07-12 10:13:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:00,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:00,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:00,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75065789] [2022-07-12 10:13:00,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75065789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:00,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:00,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:13:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959093368] [2022-07-12 10:13:00,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:13:00,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:13:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:13:00,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-07-12 10:13:00,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:00,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-07-12 10:13:00,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:00,519 INFO L129 PetriNetUnfolder]: 2/87 cut-off events. [2022-07-12 10:13:00,520 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:13:00,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 87 events. 2/87 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 10/94 useless extension candidates. Maximal degree in co-relation 50. Up to 10 conditions per place. [2022-07-12 10:13:00,522 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 10 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-07-12 10:13:00,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 196 flow [2022-07-12 10:13:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:13:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:13:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-07-12 10:13:00,540 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8900343642611683 [2022-07-12 10:13:00,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2022-07-12 10:13:00,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2022-07-12 10:13:00,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:00,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2022-07-12 10:13:00,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,558 INFO L186 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 3 states and 259 transitions. [2022-07-12 10:13:00,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 196 flow [2022-07-12 10:13:00,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:13:00,565 INFO L242 Difference]: Finished difference. Result has 83 places, 81 transitions, 174 flow [2022-07-12 10:13:00,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2022-07-12 10:13:00,572 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2022-07-12 10:13:00,573 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 174 flow [2022-07-12 10:13:00,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,573 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:00,573 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:00,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:13:00,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1409393791, now seen corresponding path program 1 times [2022-07-12 10:13:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:00,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981391358] [2022-07-12 10:13:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:00,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:00,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981391358] [2022-07-12 10:13:00,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981391358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:00,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946685137] [2022-07-12 10:13:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:00,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:00,703 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) [2022-07-12 10:13:00,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:13:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 10:13:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:13:00,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:13:00,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946685137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:00,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:13:00,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-12 10:13:00,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421641509] [2022-07-12 10:13:00,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:00,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:13:00,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:13:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:13:00,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 97 [2022-07-12 10:13:00,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:00,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 97 [2022-07-12 10:13:00,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:00,860 INFO L129 PetriNetUnfolder]: 2/97 cut-off events. [2022-07-12 10:13:00,861 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:13:00,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 97 events. 2/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 81. Up to 9 conditions per place. [2022-07-12 10:13:00,862 INFO L132 encePairwiseOnDemand]: 94/97 looper letters, 9 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-07-12 10:13:00,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 202 flow [2022-07-12 10:13:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:13:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:13:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-07-12 10:13:00,863 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8762886597938144 [2022-07-12 10:13:00,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-07-12 10:13:00,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-07-12 10:13:00,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:00,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-07-12 10:13:00,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,866 INFO L186 Difference]: Start difference. First operand has 83 places, 81 transitions, 174 flow. Second operand 3 states and 255 transitions. [2022-07-12 10:13:00,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 202 flow [2022-07-12 10:13:00,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:00,873 INFO L242 Difference]: Finished difference. Result has 85 places, 82 transitions, 184 flow [2022-07-12 10:13:00,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-07-12 10:13:00,876 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2022-07-12 10:13:00,876 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 184 flow [2022-07-12 10:13:00,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:00,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:00,877 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:00,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:13:01,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:01,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -464838401, now seen corresponding path program 1 times [2022-07-12 10:13:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034533478] [2022-07-12 10:13:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:13:01,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034533478] [2022-07-12 10:13:01,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034533478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214222478] [2022-07-12 10:13:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:01,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:01,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:01,150 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) [2022-07-12 10:13:01,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:13:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:01,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:13:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:13:01,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:13:01,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214222478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:01,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:01,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:13:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574807073] [2022-07-12 10:13:01,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:13:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:13:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:13:01,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-07-12 10:13:01,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:01,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-07-12 10:13:01,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:01,369 INFO L129 PetriNetUnfolder]: 2/107 cut-off events. [2022-07-12 10:13:01,375 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:13:01,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 107 events. 2/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2022-07-12 10:13:01,376 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 10 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2022-07-12 10:13:01,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 240 flow [2022-07-12 10:13:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:13:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:13:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 732 transitions. [2022-07-12 10:13:01,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8384879725085911 [2022-07-12 10:13:01,378 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 732 transitions. [2022-07-12 10:13:01,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 732 transitions. [2022-07-12 10:13:01,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:01,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 732 transitions. [2022-07-12 10:13:01,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.33333333333333) internal successors, (732), 9 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,384 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,384 INFO L186 Difference]: Start difference. First operand has 85 places, 82 transitions, 184 flow. Second operand 9 states and 732 transitions. [2022-07-12 10:13:01,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 240 flow [2022-07-12 10:13:01,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:01,391 INFO L242 Difference]: Finished difference. Result has 95 places, 88 transitions, 232 flow [2022-07-12 10:13:01,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=232, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2022-07-12 10:13:01,392 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2022-07-12 10:13:01,392 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 232 flow [2022-07-12 10:13:01,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,393 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:01,393 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:01,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:13:01,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 10:13:01,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1283919323, now seen corresponding path program 2 times [2022-07-12 10:13:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:01,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704211677] [2022-07-12 10:13:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:01,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 10:13:01,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704211677] [2022-07-12 10:13:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704211677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:01,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974437189] [2022-07-12 10:13:01,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:13:01,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:01,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:01,672 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) [2022-07-12 10:13:01,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:13:01,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:13:01,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:13:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:13:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 10:13:01,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 10:13:01,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974437189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:01,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:01,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:13:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861905333] [2022-07-12 10:13:01,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:01,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:13:01,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:13:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:13:01,909 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-07-12 10:13:01,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:01,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-07-12 10:13:01,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:01,981 INFO L129 PetriNetUnfolder]: 2/120 cut-off events. [2022-07-12 10:13:01,982 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:13:01,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 120 events. 2/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 135. Up to 7 conditions per place. [2022-07-12 10:13:01,983 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 9 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-07-12 10:13:01,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 96 transitions, 286 flow [2022-07-12 10:13:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:13:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:13:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 740 transitions. [2022-07-12 10:13:01,986 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847651775486827 [2022-07-12 10:13:01,986 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 740 transitions. [2022-07-12 10:13:01,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 740 transitions. [2022-07-12 10:13:01,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:01,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 740 transitions. [2022-07-12 10:13:01,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.22222222222223) internal successors, (740), 9 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,994 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:01,994 INFO L186 Difference]: Start difference. First operand has 95 places, 88 transitions, 232 flow. Second operand 9 states and 740 transitions. [2022-07-12 10:13:01,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 96 transitions, 286 flow [2022-07-12 10:13:01,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 96 transitions, 280 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:02,001 INFO L242 Difference]: Finished difference. Result has 105 places, 94 transitions, 276 flow [2022-07-12 10:13:02,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=276, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2022-07-12 10:13:02,004 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2022-07-12 10:13:02,005 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 276 flow [2022-07-12 10:13:02,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:02,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:02,007 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:02,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:13:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:02,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1447238555, now seen corresponding path program 3 times [2022-07-12 10:13:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:02,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914781521] [2022-07-12 10:13:02,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:02,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:02,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914781521] [2022-07-12 10:13:02,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914781521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:02,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277014364] [2022-07-12 10:13:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:13:02,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:02,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:02,362 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) [2022-07-12 10:13:02,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:13:02,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 10:13:02,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:13:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:13:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:02,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:02,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277014364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:02,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:02,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:13:02,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494250965] [2022-07-12 10:13:02,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:02,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:13:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:13:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:13:02,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-07-12 10:13:02,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 276 flow. Second operand has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:02,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:02,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-07-12 10:13:02,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:02,720 INFO L129 PetriNetUnfolder]: 2/152 cut-off events. [2022-07-12 10:13:02,721 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-12 10:13:02,722 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 152 events. 2/152 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 221. Up to 11 conditions per place. [2022-07-12 10:13:02,722 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 14 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2022-07-12 10:13:02,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 112 transitions, 434 flow [2022-07-12 10:13:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:13:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:13:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1698 transitions. [2022-07-12 10:13:02,726 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.833578792341679 [2022-07-12 10:13:02,726 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1698 transitions. [2022-07-12 10:13:02,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1698 transitions. [2022-07-12 10:13:02,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:02,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1698 transitions. [2022-07-12 10:13:02,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.85714285714286) internal successors, (1698), 21 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:02,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:02,732 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:02,732 INFO L186 Difference]: Start difference. First operand has 105 places, 94 transitions, 276 flow. Second operand 21 states and 1698 transitions. [2022-07-12 10:13:02,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 112 transitions, 434 flow [2022-07-12 10:13:02,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 112 transitions, 428 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:02,736 INFO L242 Difference]: Finished difference. Result has 129 places, 107 transitions, 400 flow [2022-07-12 10:13:02,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=400, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2022-07-12 10:13:02,736 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 45 predicate places. [2022-07-12 10:13:02,737 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 400 flow [2022-07-12 10:13:02,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:02,737 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:02,737 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:02,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:13:02,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:02,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash -692690511, now seen corresponding path program 4 times [2022-07-12 10:13:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376628973] [2022-07-12 10:13:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:02,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:03,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:03,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376628973] [2022-07-12 10:13:03,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376628973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:03,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689183474] [2022-07-12 10:13:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:13:03,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:03,112 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) [2022-07-12 10:13:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:13:03,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:13:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:13:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:13:03,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:03,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:03,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689183474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:03,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:03,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:13:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814670646] [2022-07-12 10:13:03,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:03,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:13:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:13:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:13:03,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-07-12 10:13:03,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 400 flow. Second operand has 34 states, 34 states have (on average 81.0) internal successors, (2754), 34 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:03,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:03,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-07-12 10:13:03,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:04,035 INFO L129 PetriNetUnfolder]: 2/216 cut-off events. [2022-07-12 10:13:04,035 INFO L130 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-07-12 10:13:04,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 216 events. 2/216 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 8/223 useless extension candidates. Maximal degree in co-relation 448. Up to 27 conditions per place. [2022-07-12 10:13:04,038 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 22 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2022-07-12 10:13:04,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 144 transitions, 822 flow [2022-07-12 10:13:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:13:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:13:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3630 transitions. [2022-07-12 10:13:04,044 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8316151202749141 [2022-07-12 10:13:04,044 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3630 transitions. [2022-07-12 10:13:04,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3630 transitions. [2022-07-12 10:13:04,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:04,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3630 transitions. [2022-07-12 10:13:04,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 80.66666666666667) internal successors, (3630), 45 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:04,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 97.0) internal successors, (4462), 46 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:04,058 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 97.0) internal successors, (4462), 46 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:04,059 INFO L186 Difference]: Start difference. First operand has 129 places, 107 transitions, 400 flow. Second operand 45 states and 3630 transitions. [2022-07-12 10:13:04,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 144 transitions, 822 flow [2022-07-12 10:13:04,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 144 transitions, 782 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:13:04,064 INFO L242 Difference]: Finished difference. Result has 176 places, 132 transitions, 678 flow [2022-07-12 10:13:04,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=678, PETRI_PLACES=176, PETRI_TRANSITIONS=132} [2022-07-12 10:13:04,065 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 92 predicate places. [2022-07-12 10:13:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 132 transitions, 678 flow [2022-07-12 10:13:04,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.0) internal successors, (2754), 34 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:04,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:04,066 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:04,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:13:04,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:04,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 166775881, now seen corresponding path program 5 times [2022-07-12 10:13:04,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268308819] [2022-07-12 10:13:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:04,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 10:13:04,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268308819] [2022-07-12 10:13:04,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268308819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500162788] [2022-07-12 10:13:04,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:13:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:04,664 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) [2022-07-12 10:13:04,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:13:04,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-12 10:13:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:13:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:13:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-07-12 10:13:04,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-07-12 10:13:05,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500162788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:05,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:05,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2022-07-12 10:13:05,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668637510] [2022-07-12 10:13:05,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:05,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 10:13:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 10:13:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 10:13:05,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-07-12 10:13:05,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 132 transitions, 678 flow. Second operand has 47 states, 47 states have (on average 74.29787234042553) internal successors, (3492), 47 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:05,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:05,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-07-12 10:13:05,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:51,061 INFO L129 PetriNetUnfolder]: 2209/7059 cut-off events. [2022-07-12 10:13:51,061 INFO L130 PetriNetUnfolder]: For 20228/20228 co-relation queries the response was YES. [2022-07-12 10:13:51,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22934 conditions, 7059 events. 2209/7059 cut-off events. For 20228/20228 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 51024 event pairs, 20 based on Foata normal form. 308/7363 useless extension candidates. Maximal degree in co-relation 18139. Up to 928 conditions per place. [2022-07-12 10:13:51,128 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 961 selfloop transitions, 1927 changer transitions 0/2951 dead transitions. [2022-07-12 10:13:51,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1116 places, 2951 transitions, 26324 flow [2022-07-12 10:13:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2022-07-12 10:13:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2022-07-12 10:13:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 70848 transitions. [2022-07-12 10:13:51,182 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.776186772133177 [2022-07-12 10:13:51,183 INFO L72 ComplementDD]: Start complementDD. Operand 941 states and 70848 transitions. [2022-07-12 10:13:51,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 941 states and 70848 transitions. [2022-07-12 10:13:51,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:51,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 941 states and 70848 transitions. [2022-07-12 10:13:51,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 942 states, 941 states have (on average 75.29011689691818) internal successors, (70848), 941 states have internal predecessors, (70848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:51,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 942 states, 942 states have (on average 97.0) internal successors, (91374), 942 states have internal predecessors, (91374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:51,570 INFO L81 ComplementDD]: Finished complementDD. Result has 942 states, 942 states have (on average 97.0) internal successors, (91374), 942 states have internal predecessors, (91374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:51,571 INFO L186 Difference]: Start difference. First operand has 176 places, 132 transitions, 678 flow. Second operand 941 states and 70848 transitions. [2022-07-12 10:13:51,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1116 places, 2951 transitions, 26324 flow [2022-07-12 10:13:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1098 places, 2951 transitions, 25164 flow, removed 220 selfloop flow, removed 18 redundant places. [2022-07-12 10:13:51,650 INFO L242 Difference]: Finished difference. Result has 1378 places, 2119 transitions, 18814 flow [2022-07-12 10:13:51,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=941, PETRI_FLOW=18814, PETRI_PLACES=1378, PETRI_TRANSITIONS=2119} [2022-07-12 10:13:51,652 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1294 predicate places. [2022-07-12 10:13:51,652 INFO L495 AbstractCegarLoop]: Abstraction has has 1378 places, 2119 transitions, 18814 flow [2022-07-12 10:13:51,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.29787234042553) internal successors, (3492), 47 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:51,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:51,654 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:51,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:13:51,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:51,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:13:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash 396055486, now seen corresponding path program 6 times [2022-07-12 10:13:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235700466] [2022-07-12 10:13:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-12 10:13:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235700466] [2022-07-12 10:13:52,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235700466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:13:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403321194] [2022-07-12 10:13:52,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:13:52,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:13:52,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:52,343 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) [2022-07-12 10:13:52,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:13:52,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-12 10:13:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:13:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:13:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:13:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 31 proven. 238 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-07-12 10:13:52,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:13:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 31 proven. 238 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-07-12 10:13:53,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403321194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:13:53,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:13:53,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2022-07-12 10:13:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037373313] [2022-07-12 10:13:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:13:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 10:13:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 10:13:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=3566, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 10:13:53,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-07-12 10:13:53,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1378 places, 2119 transitions, 18814 flow. Second operand has 65 states, 65 states have (on average 74.23076923076923) internal successors, (4825), 65 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:13:53,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:53,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-07-12 10:13:53,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand