./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:27:48,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:27:48,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:27:48,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:27:48,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:27:48,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:27:48,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:27:48,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:27:48,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:27:48,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:27:48,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:27:48,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:27:48,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:27:48,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:27:48,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:27:48,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:27:48,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:27:48,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:27:48,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:27:48,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:27:48,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:27:48,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:27:48,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:27:48,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:27:48,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:27:48,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:27:48,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:27:48,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:27:48,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:27:48,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:27:48,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:27:48,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:27:48,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:27:48,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:27:48,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:27:48,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:27:48,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:27:48,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:27:48,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:27:48,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:27:48,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:27:48,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:27:48,893 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:27:48,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:27:48,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:27:48,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:27:48,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:27:48,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:27:48,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:27:48,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:27:48,897 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:27:48,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:27:48,897 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:27:48,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:27:48,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:27:48,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:27:48,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:27:48,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:27:48,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:27:48,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:27:48,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:27:48,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:27:48,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:27:48,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:27:48,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:27:48,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:27:48,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:27:48,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:27:48,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:27:48,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:27:48,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:27:48,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:27:48,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:27:48,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:27:48,902 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:27:48,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:27:48,902 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:27:48,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:27:49,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:27:49,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:27:49,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:27:49,203 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:27:49,203 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:27:49,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-09-01 12:27:50,423 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:27:50,595 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:27:50,596 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-09-01 12:27:50,601 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe04f99e/7947a38cacee4050be7e8c508e8127ec/FLAG5bcdd3c04 [2023-09-01 12:27:50,614 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe04f99e/7947a38cacee4050be7e8c508e8127ec [2023-09-01 12:27:50,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:27:50,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:27:50,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:27:50,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:27:50,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:27:50,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28015610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50, skipping insertion in model container [2023-09-01 12:27:50,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:27:50,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:27:50,766 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] [2023-09-01 12:27:50,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:27:50,777 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:27:50,794 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] [2023-09-01 12:27:50,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:27:50,808 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:27:50,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50 WrapperNode [2023-09-01 12:27:50,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:27:50,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:27:50,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:27:50,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:27:50,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,842 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-09-01 12:27:50,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:27:50,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:27:50,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:27:50,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:27:50,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,879 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:27:50,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:27:50,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:27:50,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:27:50,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (1/1) ... [2023-09-01 12:27:50,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:27:50,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:50,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:27:50,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:27:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:27:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:27:50,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:27:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:27:50,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:27:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:27:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:27:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:27:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:27:50,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:27:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:27:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:27:50,959 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:27:51,063 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:27:51,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:27:51,260 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:27:51,265 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:27:51,266 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 12:27:51,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:27:51 BoogieIcfgContainer [2023-09-01 12:27:51,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:27:51,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:27:51,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:27:51,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:27:51,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:27:50" (1/3) ... [2023-09-01 12:27:51,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544b6faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:27:51, skipping insertion in model container [2023-09-01 12:27:51,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:50" (2/3) ... [2023-09-01 12:27:51,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544b6faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:27:51, skipping insertion in model container [2023-09-01 12:27:51,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:27:51" (3/3) ... [2023-09-01 12:27:51,279 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-09-01 12:27:51,286 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:27:51,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:27:51,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:27:51,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:27:51,383 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:27:51,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2023-09-01 12:27:51,484 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2023-09-01 12:27:51,484 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:27:51,488 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. [2023-09-01 12:27:51,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2023-09-01 12:27:51,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-09-01 12:27:51,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:27:51,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-09-01 12:27:51,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-09-01 12:27:51,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-09-01 12:27:51,542 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2023-09-01 12:27:51,543 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:27:51,543 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. [2023-09-01 12:27:51,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-09-01 12:27:53,469 INFO L134 LiptonReduction]: Checked pairs total: 509 [2023-09-01 12:27:53,469 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-09-01 12:27:53,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:27:53,483 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;@63306b2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:27:53,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:27:53,488 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 12:27:53,488 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:27:53,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:53,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:53,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:53,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1543000620, now seen corresponding path program 1 times [2023-09-01 12:27:53,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:53,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140825971] [2023-09-01 12:27:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:53,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:53,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:53,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140825971] [2023-09-01 12:27:53,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140825971] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:53,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:53,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 12:27:53,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226782501] [2023-09-01 12:27:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:27:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:27:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:27:54,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-09-01 12:27:54,015 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) [2023-09-01 12:27:54,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:54,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-09-01 12:27:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:54,079 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-09-01 12:27:54,080 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 12:27:54,081 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. [2023-09-01 12:27:54,083 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-09-01 12:27:54,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-09-01 12:27:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:27:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:27:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-09-01 12:27:54,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5514705882352942 [2023-09-01 12:27:54,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-09-01 12:27:54,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-09-01 12:27:54,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:54,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-09-01 12:27:54,102 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) [2023-09-01 12:27:54,106 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) [2023-09-01 12:27:54,106 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) [2023-09-01 12:27:54,107 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 225 transitions. [2023-09-01 12:27:54,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-09-01 12:27:54,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:54,111 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-09-01 12:27:54,113 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} [2023-09-01 12:27:54,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-09-01 12:27:54,116 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-09-01 12:27:54,116 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) [2023-09-01 12:27:54,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:54,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:54,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:27:54,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:54,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:54,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1815553743, now seen corresponding path program 1 times [2023-09-01 12:27:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:54,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265691248] [2023-09-01 12:27:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:54,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:54,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:54,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265691248] [2023-09-01 12:27:54,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265691248] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:54,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296793089] [2023-09-01 12:27:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:54,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:54,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:54,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:27:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:27:54,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:55,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296793089] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:55,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:55,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-09-01 12:27:55,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918004446] [2023-09-01 12:27:55,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:55,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:27:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:27:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:27:55,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-09-01 12:27:55,128 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) [2023-09-01 12:27:55,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:55,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-09-01 12:27:55,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:57,254 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 [] [2023-09-01 12:27:57,402 INFO L130 PetriNetUnfolder]: 81/152 cut-off events. [2023-09-01 12:27:57,402 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 12:27:57,402 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. [2023-09-01 12:27:57,403 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 32 selfloop transitions, 9 changer transitions 6/48 dead transitions. [2023-09-01 12:27:57,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 48 transitions, 228 flow [2023-09-01 12:27:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2023-09-01 12:27:57,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-09-01 12:27:57,407 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2023-09-01 12:27:57,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2023-09-01 12:27:57,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:57,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2023-09-01 12:27:57,410 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) [2023-09-01 12:27:57,413 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) [2023-09-01 12:27:57,413 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) [2023-09-01 12:27:57,414 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 7 states and 462 transitions. [2023-09-01 12:27:57,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 48 transitions, 228 flow [2023-09-01 12:27:57,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:27:57,415 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 109 flow [2023-09-01 12:27:57,416 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} [2023-09-01 12:27:57,416 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-09-01 12:27:57,417 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 109 flow [2023-09-01 12:27:57,417 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) [2023-09-01 12:27:57,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:57,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:57,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 12:27:57,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:57,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:57,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1901148465, now seen corresponding path program 1 times [2023-09-01 12:27:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:57,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421408748] [2023-09-01 12:27:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421408748] [2023-09-01 12:27:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421408748] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826177990] [2023-09-01 12:27:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:57,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:57,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:57,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:57,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:27:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 12:27:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:58,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:58,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826177990] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:58,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:58,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-09-01 12:27:58,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828554657] [2023-09-01 12:27:58,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:58,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:27:58,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:58,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:27:58,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:27:58,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-09-01 12:27:58,436 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) [2023-09-01 12:27:58,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:58,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-09-01 12:27:58,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:58,632 INFO L130 PetriNetUnfolder]: 77/155 cut-off events. [2023-09-01 12:27:58,632 INFO L131 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2023-09-01 12:27:58,633 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. [2023-09-01 12:27:58,634 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 25 selfloop transitions, 7 changer transitions 13/47 dead transitions. [2023-09-01 12:27:58,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 274 flow [2023-09-01 12:27:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:27:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:27:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2023-09-01 12:27:58,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2023-09-01 12:27:58,638 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2023-09-01 12:27:58,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2023-09-01 12:27:58,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:58,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2023-09-01 12:27:58,640 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) [2023-09-01 12:27:58,641 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) [2023-09-01 12:27:58,642 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) [2023-09-01 12:27:58,642 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 109 flow. Second operand 6 states and 396 transitions. [2023-09-01 12:27:58,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 274 flow [2023-09-01 12:27:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 257 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 12:27:58,644 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 132 flow [2023-09-01 12:27:58,645 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} [2023-09-01 12:27:58,645 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-09-01 12:27:58,646 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 132 flow [2023-09-01 12:27:58,646 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) [2023-09-01 12:27:58,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:58,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:58,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 12:27:58,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 12:27:58,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:58,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1541373281, now seen corresponding path program 2 times [2023-09-01 12:27:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:58,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066986795] [2023-09-01 12:27:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066986795] [2023-09-01 12:27:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066986795] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073480097] [2023-09-01 12:27:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:59,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:59,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:27:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:59,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:27:59,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:59,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:59,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073480097] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:59,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:59,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-09-01 12:27:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383654850] [2023-09-01 12:27:59,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:59,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:27:59,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:27:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:27:59,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-09-01 12:27:59,888 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) [2023-09-01 12:27:59,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:59,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-09-01 12:27:59,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:00,136 INFO L130 PetriNetUnfolder]: 137/263 cut-off events. [2023-09-01 12:28:00,136 INFO L131 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2023-09-01 12:28:00,137 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. [2023-09-01 12:28:00,138 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 46 selfloop transitions, 20 changer transitions 12/78 dead transitions. [2023-09-01 12:28:00,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 78 transitions, 464 flow [2023-09-01 12:28:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 671 transitions. [2023-09-01 12:28:00,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2023-09-01 12:28:00,142 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 671 transitions. [2023-09-01 12:28:00,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 671 transitions. [2023-09-01 12:28:00,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:00,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 671 transitions. [2023-09-01 12:28:00,144 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) [2023-09-01 12:28:00,146 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) [2023-09-01 12:28:00,147 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) [2023-09-01 12:28:00,147 INFO L175 Difference]: Start difference. First operand has 35 places, 25 transitions, 132 flow. Second operand 11 states and 671 transitions. [2023-09-01 12:28:00,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 78 transitions, 464 flow [2023-09-01 12:28:00,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 78 transitions, 444 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 12:28:00,158 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 239 flow [2023-09-01 12:28:00,159 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} [2023-09-01 12:28:00,160 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-09-01 12:28:00,160 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 239 flow [2023-09-01 12:28:00,161 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) [2023-09-01 12:28:00,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:00,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:00,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:00,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:00,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1519035833, now seen corresponding path program 3 times [2023-09-01 12:28:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630412230] [2023-09-01 12:28:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:00,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:00,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630412230] [2023-09-01 12:28:00,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630412230] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:00,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994949478] [2023-09-01 12:28:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:28:00,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:00,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:00,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:28:00,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:28:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:28:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:00,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:01,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994949478] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:01,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:01,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-09-01 12:28:01,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995734387] [2023-09-01 12:28:01,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:01,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:28:01,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:28:01,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:28:01,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 136 [2023-09-01 12:28:01,357 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) [2023-09-01 12:28:01,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:01,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 136 [2023-09-01 12:28:01,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:01,826 INFO L130 PetriNetUnfolder]: 165/324 cut-off events. [2023-09-01 12:28:01,826 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2023-09-01 12:28:01,828 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. [2023-09-01 12:28:01,829 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 55 selfloop transitions, 20 changer transitions 12/87 dead transitions. [2023-09-01 12:28:01,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 87 transitions, 614 flow [2023-09-01 12:28:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:28:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:28:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 614 transitions. [2023-09-01 12:28:01,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514705882352941 [2023-09-01 12:28:01,832 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 614 transitions. [2023-09-01 12:28:01,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 614 transitions. [2023-09-01 12:28:01,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:01,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 614 transitions. [2023-09-01 12:28:01,834 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) [2023-09-01 12:28:01,836 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) [2023-09-01 12:28:01,837 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) [2023-09-01 12:28:01,837 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 239 flow. Second operand 10 states and 614 transitions. [2023-09-01 12:28:01,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 87 transitions, 614 flow [2023-09-01 12:28:01,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 87 transitions, 536 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-09-01 12:28:01,842 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 320 flow [2023-09-01 12:28:01,842 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} [2023-09-01 12:28:01,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-09-01 12:28:01,843 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 320 flow [2023-09-01 12:28:01,843 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) [2023-09-01 12:28:01,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:01,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:01,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:02,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:02,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:02,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2058058253, now seen corresponding path program 2 times [2023-09-01 12:28:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324507320] [2023-09-01 12:28:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:02,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:02,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324507320] [2023-09-01 12:28:02,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324507320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:02,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713866142] [2023-09-01 12:28:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:28:02,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:02,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:02,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:28:02,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:28:02,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 12:28:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:02,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:02,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713866142] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:02,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:02,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 12:28:02,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681682576] [2023-09-01 12:28:02,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:02,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:28:02,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:28:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:28:02,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-09-01 12:28:02,701 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) [2023-09-01 12:28:02,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:02,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-09-01 12:28:02,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:03,066 INFO L130 PetriNetUnfolder]: 190/381 cut-off events. [2023-09-01 12:28:03,066 INFO L131 PetriNetUnfolder]: For 883/897 co-relation queries the response was YES. [2023-09-01 12:28:03,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 381 events. 190/381 cut-off events. For 883/897 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1680 event pairs, 22 based on Foata normal form. 9/376 useless extension candidates. Maximal degree in co-relation 1362. Up to 237 conditions per place. [2023-09-01 12:28:03,068 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 60 selfloop transitions, 22 changer transitions 7/92 dead transitions. [2023-09-01 12:28:03,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 695 flow [2023-09-01 12:28:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:28:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:28:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 596 transitions. [2023-09-01 12:28:03,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2023-09-01 12:28:03,070 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 596 transitions. [2023-09-01 12:28:03,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 596 transitions. [2023-09-01 12:28:03,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:03,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 596 transitions. [2023-09-01 12:28:03,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 66.22222222222223) internal successors, (596), 9 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,073 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) [2023-09-01 12:28:03,074 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) [2023-09-01 12:28:03,074 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 320 flow. Second operand 9 states and 596 transitions. [2023-09-01 12:28:03,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 695 flow [2023-09-01 12:28:03,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 640 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-09-01 12:28:03,078 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 397 flow [2023-09-01 12:28:03,079 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} [2023-09-01 12:28:03,079 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-09-01 12:28:03,079 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 397 flow [2023-09-01 12:28:03,080 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) [2023-09-01 12:28:03,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:03,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:03,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:03,286 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 [2023-09-01 12:28:03,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:03,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:03,287 INFO L85 PathProgramCache]: Analyzing trace with hash 587325377, now seen corresponding path program 3 times [2023-09-01 12:28:03,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:03,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310855004] [2023-09-01 12:28:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:03,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310855004] [2023-09-01 12:28:03,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310855004] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744402959] [2023-09-01 12:28:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:28:03,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:03,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:03,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:03,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:28:03,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:28:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:03,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 12:28:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:03,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:03,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744402959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:03,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:03,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-09-01 12:28:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612737953] [2023-09-01 12:28:03,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:28:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:28:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:28:03,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 136 [2023-09-01 12:28:03,807 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) [2023-09-01 12:28:03,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:03,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 136 [2023-09-01 12:28:03,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:03,993 INFO L130 PetriNetUnfolder]: 234/463 cut-off events. [2023-09-01 12:28:03,994 INFO L131 PetriNetUnfolder]: For 1200/1213 co-relation queries the response was YES. [2023-09-01 12:28:03,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 463 events. 234/463 cut-off events. For 1200/1213 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2157 event pairs, 46 based on Foata normal form. 9/457 useless extension candidates. Maximal degree in co-relation 1705. Up to 317 conditions per place. [2023-09-01 12:28:03,997 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 63 selfloop transitions, 25 changer transitions 7/98 dead transitions. [2023-09-01 12:28:03,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 783 flow [2023-09-01 12:28:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:28:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:28:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 653 transitions. [2023-09-01 12:28:04,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801470588235294 [2023-09-01 12:28:04,000 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 653 transitions. [2023-09-01 12:28:04,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 653 transitions. [2023-09-01 12:28:04,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:04,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 653 transitions. [2023-09-01 12:28:04,002 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) [2023-09-01 12:28:04,004 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) [2023-09-01 12:28:04,005 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) [2023-09-01 12:28:04,005 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 397 flow. Second operand 10 states and 653 transitions. [2023-09-01 12:28:04,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 783 flow [2023-09-01 12:28:04,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 708 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-09-01 12:28:04,012 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 482 flow [2023-09-01 12:28:04,012 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} [2023-09-01 12:28:04,013 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-09-01 12:28:04,013 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 482 flow [2023-09-01 12:28:04,013 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) [2023-09-01 12:28:04,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:04,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:04,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:04,219 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 [2023-09-01 12:28:04,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:04,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1884096032, now seen corresponding path program 1 times [2023-09-01 12:28:04,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:04,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658007283] [2023-09-01 12:28:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:04,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:04,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658007283] [2023-09-01 12:28:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658007283] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:04,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414340268] [2023-09-01 12:28:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:04,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:04,693 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:04,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:28:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 12:28:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:04,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:32,055 WARN L222 SmtUtils]: Spent 24.07s 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) [2023-09-01 12:30:40,120 WARN L222 SmtUtils]: Spent 5.91s 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