./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:39:40,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:39:40,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:39:40,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:39:40,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:39:40,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:39:40,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:39:40,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:39:40,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:39:40,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:39:40,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:39:40,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:39:40,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:39:40,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:39:40,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:39:40,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:39:40,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:39:40,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:39:40,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:39:40,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:39:40,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:39:40,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:39:40,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:39:40,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:39:40,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:39:40,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:39:40,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:39:40,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:39:40,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:39:40,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:39:40,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:39:40,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:39:40,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:39:40,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:39:40,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:39:40,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:39:40,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:39:40,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:39:40,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:39:40,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:39:40,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:39:40,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:39:40,949 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:39:40,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:39:40,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:39:40,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:39:40,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:39:40,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:39:40,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:39:40,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:39:40,952 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:39:40,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:39:40,952 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:39:40,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:39:40,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:39:40,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:39:40,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:39:40,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:39:40,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:39:40,954 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:39:40,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:39:40,954 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:39:40,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:39:40,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:39:40,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:39:40,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:39:40,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:39:40,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:39:40,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:39:40,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:39:40,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:39:40,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:39:40,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:39:40,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:39:40,957 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:39:40,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:39:40,957 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:39:40,958 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:39:41,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:39:41,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:39:41,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:39:41,243 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:39:41,243 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:39:41,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-31 01:39:42,402 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:39:42,583 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:39:42,584 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-31 01:39:42,588 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3401814bb/e8bc218f7d2046b8bb683f7067499d30/FLAG6e746b4fc [2023-08-31 01:39:42,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3401814bb/e8bc218f7d2046b8bb683f7067499d30 [2023-08-31 01:39:42,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:39:42,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:39:42,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:39:42,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:39:42,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:39:42,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ebe88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42, skipping insertion in model container [2023-08-31 01:39:42,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:39:42,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:39:42,785 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2023-08-31 01:39:42,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:39:42,797 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:39:42,814 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2023-08-31 01:39:42,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:39:42,827 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:39:42,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42 WrapperNode [2023-08-31 01:39:42,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:39:42,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:39:42,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:39:42,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:39:42,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,855 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-08-31 01:39:42,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:39:42,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:39:42,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:39:42,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:39:42,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,875 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:39:42,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:39:42,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:39:42,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:39:42,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (1/1) ... [2023-08-31 01:39:42,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:39:42,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:42,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:39:42,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:39:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:39:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:39:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:39:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:39:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:39:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:39:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:39:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:39:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:39:42,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:39:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:39:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:39:42,979 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:39:43,058 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:39:43,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:39:43,300 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:39:43,306 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:39:43,306 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 01:39:43,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:39:43 BoogieIcfgContainer [2023-08-31 01:39:43,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:39:43,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:39:43,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:39:43,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:39:43,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:39:42" (1/3) ... [2023-08-31 01:39:43,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2435b149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:39:43, skipping insertion in model container [2023-08-31 01:39:43,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:39:42" (2/3) ... [2023-08-31 01:39:43,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2435b149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:39:43, skipping insertion in model container [2023-08-31 01:39:43,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:39:43" (3/3) ... [2023-08-31 01:39:43,338 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-08-31 01:39:43,344 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:39:43,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:39:43,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:39:43,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:39:43,481 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 01:39:43,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2023-08-31 01:39:43,604 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2023-08-31 01:39:43,605 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:39:43,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-08-31 01:39:43,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2023-08-31 01:39:43,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-08-31 01:39:43,620 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:39:43,633 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-08-31 01:39:43,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-08-31 01:39:43,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-08-31 01:39:43,671 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2023-08-31 01:39:43,672 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:39:43,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-08-31 01:39:43,674 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-31 01:39:45,629 INFO L134 LiptonReduction]: Checked pairs total: 509 [2023-08-31 01:39:45,630 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-31 01:39:45,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:39:45,647 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60c4bb20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:39:45,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 01:39:45,652 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 01:39:45,652 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 01:39:45,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:45,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:45,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:45,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1543000620, now seen corresponding path program 1 times [2023-08-31 01:39:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:45,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796020603] [2023-08-31 01:39:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:45,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:46,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:46,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796020603] [2023-08-31 01:39:46,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796020603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:39:46,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:39:46,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 01:39:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816817727] [2023-08-31 01:39:46,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:39:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:39:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:39:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:39:46,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-08-31 01:39:46,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:46,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:46,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-08-31 01:39:46,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:46,330 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-08-31 01:39:46,330 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-31 01:39:46,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-31 01:39:46,332 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-31 01:39:46,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-08-31 01:39:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:39:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:39:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-31 01:39:46,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514705882352942 [2023-08-31 01:39:46,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-31 01:39:46,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-31 01:39:46,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:46,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-31 01:39:46,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:46,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:46,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:46,362 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 225 transitions. [2023-08-31 01:39:46,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-08-31 01:39:46,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 01:39:46,365 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-08-31 01:39:46,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-31 01:39:46,370 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-31 01:39:46,370 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-08-31 01:39:46,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:46,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:46,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:39:46,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:46,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1815553743, now seen corresponding path program 1 times [2023-08-31 01:39:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:46,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908027181] [2023-08-31 01:39:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:46,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:46,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908027181] [2023-08-31 01:39:46,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908027181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943135279] [2023-08-31 01:39:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:46,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:46,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:46,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:46,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:39:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:39:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:46,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:47,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943135279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:47,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:47,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-31 01:39:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448368429] [2023-08-31 01:39:47,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:47,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:39:47,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:39:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:39:47,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-31 01:39:47,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:47,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:47,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-31 01:39:47,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:49,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:39:49,707 INFO L130 PetriNetUnfolder]: 81/152 cut-off events. [2023-08-31 01:39:49,707 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-31 01:39:49,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 152 events. 81/152 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 1 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 89. Up to 83 conditions per place. [2023-08-31 01:39:49,709 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 32 selfloop transitions, 9 changer transitions 6/48 dead transitions. [2023-08-31 01:39:49,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 48 transitions, 228 flow [2023-08-31 01:39:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:39:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:39:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2023-08-31 01:39:49,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-08-31 01:39:49,712 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2023-08-31 01:39:49,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2023-08-31 01:39:49,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:49,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2023-08-31 01:39:49,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:49,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:49,718 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:49,718 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 7 states and 462 transitions. [2023-08-31 01:39:49,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 48 transitions, 228 flow [2023-08-31 01:39:49,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:39:49,720 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 109 flow [2023-08-31 01:39:49,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=109, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-31 01:39:49,721 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-31 01:39:49,721 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 109 flow [2023-08-31 01:39:49,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:49,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:49,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:49,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:49,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:49,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1901148465, now seen corresponding path program 1 times [2023-08-31 01:39:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:49,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652945323] [2023-08-31 01:39:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:49,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652945323] [2023-08-31 01:39:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652945323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726066174] [2023-08-31 01:39:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:50,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:50,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:39:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 01:39:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:50,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:50,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726066174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:50,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:50,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-31 01:39:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815917921] [2023-08-31 01:39:50,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:39:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:39:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:39:51,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-31 01:39:51,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 109 flow. Second operand has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:51,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:51,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-31 01:39:51,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:52,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:39:52,502 INFO L130 PetriNetUnfolder]: 77/155 cut-off events. [2023-08-31 01:39:52,502 INFO L131 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2023-08-31 01:39:52,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 155 events. 77/155 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 508 event pairs, 11 based on Foata normal form. 7/160 useless extension candidates. Maximal degree in co-relation 401. Up to 103 conditions per place. [2023-08-31 01:39:52,504 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 25 selfloop transitions, 7 changer transitions 13/47 dead transitions. [2023-08-31 01:39:52,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 274 flow [2023-08-31 01:39:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 01:39:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 01:39:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2023-08-31 01:39:52,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-08-31 01:39:52,507 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2023-08-31 01:39:52,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2023-08-31 01:39:52,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:52,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2023-08-31 01:39:52,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:52,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:52,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:52,512 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 109 flow. Second operand 6 states and 396 transitions. [2023-08-31 01:39:52,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 274 flow [2023-08-31 01:39:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 257 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 01:39:52,515 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 132 flow [2023-08-31 01:39:52,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-31 01:39:52,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-08-31 01:39:52,516 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 132 flow [2023-08-31 01:39:52,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:52,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:52,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:52,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:52,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 01:39:52,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:52,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1541373281, now seen corresponding path program 2 times [2023-08-31 01:39:52,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:52,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673249352] [2023-08-31 01:39:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:52,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673249352] [2023-08-31 01:39:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673249352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801598006] [2023-08-31 01:39:52,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:39:52,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:52,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:39:53,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:53,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:39:53,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:53,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801598006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:53,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:53,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-08-31 01:39:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004337862] [2023-08-31 01:39:53,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:53,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 01:39:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 01:39:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-08-31 01:39:53,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-08-31 01:39:53,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 132 flow. Second operand has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:53,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:53,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-08-31 01:39:53,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:53,839 INFO L130 PetriNetUnfolder]: 137/263 cut-off events. [2023-08-31 01:39:53,839 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-08-31 01:39:53,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 263 events. 137/263 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 977 event pairs, 9 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 802. Up to 126 conditions per place. [2023-08-31 01:39:53,842 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 46 selfloop transitions, 20 changer transitions 12/78 dead transitions. [2023-08-31 01:39:53,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 78 transitions, 464 flow [2023-08-31 01:39:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 01:39:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 01:39:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 671 transitions. [2023-08-31 01:39:53,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2023-08-31 01:39:53,845 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 671 transitions. [2023-08-31 01:39:53,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 671 transitions. [2023-08-31 01:39:53,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:53,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 671 transitions. [2023-08-31 01:39:53,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:53,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:53,850 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:53,850 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 132 flow. Second operand 11 states and 671 transitions. [2023-08-31 01:39:53,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 78 transitions, 464 flow [2023-08-31 01:39:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 78 transitions, 444 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-31 01:39:53,854 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 239 flow [2023-08-31 01:39:53,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=239, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-08-31 01:39:53,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-08-31 01:39:53,855 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 239 flow [2023-08-31 01:39:53,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:53,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:53,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:53,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:54,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:54,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:54,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1519035833, now seen corresponding path program 3 times [2023-08-31 01:39:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253109860] [2023-08-31 01:39:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253109860] [2023-08-31 01:39:54,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253109860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219373812] [2023-08-31 01:39:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:39:54,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:54,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:54,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:54,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:39:54,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:39:54,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 01:39:54,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:54,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:54,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219373812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:54,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:54,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-08-31 01:39:54,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924846618] [2023-08-31 01:39:54,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:54,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 01:39:54,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 01:39:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-08-31 01:39:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-08-31 01:39:55,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 239 flow. Second operand has 13 states, 13 states have (on average 56.46153846153846) internal successors, (734), 13 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:55,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:55,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-08-31 01:39:55,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:39:57,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:39:57,723 INFO L130 PetriNetUnfolder]: 165/324 cut-off events. [2023-08-31 01:39:57,723 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2023-08-31 01:39:57,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 324 events. 165/324 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1293 event pairs, 26 based on Foata normal form. 3/323 useless extension candidates. Maximal degree in co-relation 1133. Up to 218 conditions per place. [2023-08-31 01:39:57,727 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 55 selfloop transitions, 20 changer transitions 12/87 dead transitions. [2023-08-31 01:39:57,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 614 flow [2023-08-31 01:39:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:39:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:39:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2023-08-31 01:39:57,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514705882352941 [2023-08-31 01:39:57,730 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2023-08-31 01:39:57,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2023-08-31 01:39:57,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:39:57,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2023-08-31 01:39:57,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.4) internal successors, (614), 10 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:57,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:57,734 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:57,735 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 239 flow. Second operand 10 states and 614 transitions. [2023-08-31 01:39:57,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 614 flow [2023-08-31 01:39:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 87 transitions, 536 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-31 01:39:57,740 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 320 flow [2023-08-31 01:39:57,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=320, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-31 01:39:57,741 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-08-31 01:39:57,741 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 320 flow [2023-08-31 01:39:57,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.46153846153846) internal successors, (734), 13 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:57,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:39:57,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:39:57,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:39:57,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:57,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:39:57,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:39:57,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2058058253, now seen corresponding path program 2 times [2023-08-31 01:39:57,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:39:57,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846309785] [2023-08-31 01:39:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:39:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:39:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:39:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:58,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:39:58,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846309785] [2023-08-31 01:39:58,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846309785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:39:58,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997850896] [2023-08-31 01:39:58,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:39:58,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:39:58,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:39:58,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:39:58,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:39:58,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:39:58,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:39:58,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 01:39:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:39:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:58,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:39:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:39:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997850896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:39:58,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:39:58,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-31 01:39:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909367728] [2023-08-31 01:39:58,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:39:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 01:39:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:39:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 01:39:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-31 01:39:58,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-31 01:39:58,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 320 flow. Second operand has 10 states, 10 states have (on average 61.8) internal successors, (618), 10 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:39:58,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:39:58,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-31 01:39:58,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:01,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 01:40:01,242 INFO L130 PetriNetUnfolder]: 184/365 cut-off events. [2023-08-31 01:40:01,242 INFO L131 PetriNetUnfolder]: For 829/843 co-relation queries the response was YES. [2023-08-31 01:40:01,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 365 events. 184/365 cut-off events. For 829/843 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1588 event pairs, 22 based on Foata normal form. 9/360 useless extension candidates. Maximal degree in co-relation 1304. Up to 237 conditions per place. [2023-08-31 01:40:01,245 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 58 selfloop transitions, 22 changer transitions 8/91 dead transitions. [2023-08-31 01:40:01,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 675 flow [2023-08-31 01:40:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 01:40:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 01:40:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 595 transitions. [2023-08-31 01:40:01,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-08-31 01:40:01,248 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 595 transitions. [2023-08-31 01:40:01,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 595 transitions. [2023-08-31 01:40:01,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:01,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 595 transitions. [2023-08-31 01:40:01,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.11111111111111) internal successors, (595), 9 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:01,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:01,253 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:01,253 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 320 flow. Second operand 9 states and 595 transitions. [2023-08-31 01:40:01,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 675 flow [2023-08-31 01:40:01,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 91 transitions, 620 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-31 01:40:01,258 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 397 flow [2023-08-31 01:40:01,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=397, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-31 01:40:01,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-31 01:40:01,259 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 397 flow [2023-08-31 01:40:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 61.8) internal successors, (618), 10 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:01,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:01,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:01,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 01:40:01,465 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 [2023-08-31 01:40:01,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:01,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 587325377, now seen corresponding path program 3 times [2023-08-31 01:40:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:01,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511813896] [2023-08-31 01:40:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:01,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511813896] [2023-08-31 01:40:01,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511813896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:01,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557671728] [2023-08-31 01:40:01,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:40:01,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:01,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:40:01,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 01:40:01,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:40:01,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 01:40:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:01,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557671728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:40:01,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:40:01,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-08-31 01:40:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913517560] [2023-08-31 01:40:01,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:40:01,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:40:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:40:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:40:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:40:02,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-08-31 01:40:02,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 397 flow. Second operand has 11 states, 11 states have (on average 61.72727272727273) internal successors, (679), 11 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:02,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:40:02,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-08-31 01:40:02,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:40:02,269 INFO L130 PetriNetUnfolder]: 228/447 cut-off events. [2023-08-31 01:40:02,270 INFO L131 PetriNetUnfolder]: For 1131/1144 co-relation queries the response was YES. [2023-08-31 01:40:02,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1729 conditions, 447 events. 228/447 cut-off events. For 1131/1144 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2048 event pairs, 42 based on Foata normal form. 9/441 useless extension candidates. Maximal degree in co-relation 1647. Up to 301 conditions per place. [2023-08-31 01:40:02,273 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 63 selfloop transitions, 25 changer transitions 7/98 dead transitions. [2023-08-31 01:40:02,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 783 flow [2023-08-31 01:40:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 01:40:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 01:40:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 653 transitions. [2023-08-31 01:40:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801470588235294 [2023-08-31 01:40:02,276 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 653 transitions. [2023-08-31 01:40:02,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 653 transitions. [2023-08-31 01:40:02,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:40:02,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 653 transitions. [2023-08-31 01:40:02,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.3) internal successors, (653), 10 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:02,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:02,280 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:02,281 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 397 flow. Second operand 10 states and 653 transitions. [2023-08-31 01:40:02,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 783 flow [2023-08-31 01:40:02,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 708 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-31 01:40:02,287 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 482 flow [2023-08-31 01:40:02,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=482, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-31 01:40:02,287 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-08-31 01:40:02,288 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 482 flow [2023-08-31 01:40:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 61.72727272727273) internal successors, (679), 11 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:40:02,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:40:02,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:40:02,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 01:40:02,494 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 [2023-08-31 01:40:02,494 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 01:40:02,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:40:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1884096032, now seen corresponding path program 1 times [2023-08-31 01:40:02,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:40:02,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608578695] [2023-08-31 01:40:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:40:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:40:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608578695] [2023-08-31 01:40:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608578695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:40:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370713973] [2023-08-31 01:40:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:40:03,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:40:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:40:03,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:40:03,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:40:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:40:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-31 01:40:03,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:40:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:40:03,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:40:30,758 WARN L222 SmtUtils]: Spent 23.95s on a formula simplification. DAG size of input: 1170 DAG size of output: 1127 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-31 01:42:56,554 WARN L222 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 689 DAG size of output: 658 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15