./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_bad.i --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/pthread-deagle/arithmetic_prog_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 051706a1eb405a384d7cf371ab2d9b9605b94715fa3ad16d6c2eb8e3fbb8fc38 --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 15:10:20,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 15:10:20,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 15:10:20,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 15:10:20,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 15:10:20,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 15:10:20,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 15:10:20,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 15:10:20,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 15:10:20,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 15:10:20,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 15:10:20,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 15:10:20,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 15:10:20,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 15:10:20,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 15:10:20,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 15:10:20,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 15:10:20,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 15:10:20,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 15:10:20,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 15:10:20,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 15:10:20,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 15:10:20,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 15:10:20,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 15:10:20,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 15:10:20,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 15:10:20,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 15:10:20,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 15:10:20,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 15:10:20,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 15:10:20,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 15:10:20,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 15:10:20,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 15:10:20,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 15:10:20,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 15:10:20,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 15:10:20,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 15:10:20,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 15:10:20,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 15:10:20,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 15:10:20,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 15:10:20,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 15:10:20,236 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 15:10:20,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 15:10:20,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 15:10:20,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 15:10:20,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 15:10:20,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 15:10:20,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 15:10:20,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 15:10:20,239 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 15:10:20,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 15:10:20,240 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 15:10:20,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 15:10:20,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 15:10:20,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 15:10:20,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 15:10:20,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 15:10:20,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 15:10:20,241 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 15:10:20,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 15:10:20,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 15:10:20,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 15:10:20,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 15:10:20,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 15:10:20,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 15:10:20,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:10:20,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 15:10:20,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 15:10:20,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 15:10:20,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 15:10:20,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 15:10:20,244 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 15:10:20,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 15:10:20,244 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 15:10:20,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 15:10:20,245 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 15:10:20,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 051706a1eb405a384d7cf371ab2d9b9605b94715fa3ad16d6c2eb8e3fbb8fc38 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 15:10:20,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 15:10:20,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 15:10:20,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 15:10:20,595 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 15:10:20,596 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 15:10:20,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_bad.i [2023-09-01 15:10:21,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 15:10:22,082 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 15:10:22,083 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_bad.i [2023-09-01 15:10:22,105 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4fb0ae1/eac5d922ccf544c794e2b1ee8a6cc31e/FLAG701a8436f [2023-09-01 15:10:22,118 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4fb0ae1/eac5d922ccf544c794e2b1ee8a6cc31e [2023-09-01 15:10:22,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 15:10:22,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 15:10:22,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 15:10:22,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 15:10:22,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 15:10:22,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651c1028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22, skipping insertion in model container [2023-09-01 15:10:22,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 15:10:22,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 15:10:22,533 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_bad.i[39758,39771] [2023-09-01 15:10:22,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:10:22,559 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 15:10:22,615 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_bad.i[39758,39771] [2023-09-01 15:10:22,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 15:10:22,692 INFO L208 MainTranslator]: Completed translation [2023-09-01 15:10:22,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22 WrapperNode [2023-09-01 15:10:22,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 15:10:22,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 15:10:22,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 15:10:22,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 15:10:22,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,761 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-09-01 15:10:22,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 15:10:22,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 15:10:22,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 15:10:22,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 15:10:22,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 15:10:22,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 15:10:22,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 15:10:22,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 15:10:22,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (1/1) ... [2023-09-01 15:10:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 15:10:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:22,849 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 15:10:22,867 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 15:10:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 15:10:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 15:10:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-09-01 15:10:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 15:10:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 15:10:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 15:10:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 15:10:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 15:10:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 15:10:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 15:10:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 15:10:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 15:10:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 15:10:22,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 15:10:22,894 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 15:10:23,003 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 15:10:23,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 15:10:23,341 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 15:10:23,347 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 15:10:23,354 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 15:10:23,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:23 BoogieIcfgContainer [2023-09-01 15:10:23,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 15:10:23,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 15:10:23,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 15:10:23,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 15:10:23,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:10:22" (1/3) ... [2023-09-01 15:10:23,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfeaed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:10:23, skipping insertion in model container [2023-09-01 15:10:23,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:10:22" (2/3) ... [2023-09-01 15:10:23,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfeaed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:10:23, skipping insertion in model container [2023-09-01 15:10:23,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:23" (3/3) ... [2023-09-01 15:10:23,364 INFO L112 eAbstractionObserver]: Analyzing ICFG arithmetic_prog_bad.i [2023-09-01 15:10:23,371 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 15:10:23,379 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 15:10:23,379 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 15:10:23,379 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 15:10:23,442 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 15:10:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 278 flow [2023-09-01 15:10:23,562 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2023-09-01 15:10:23,563 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:23,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 10/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 82. Up to 3 conditions per place. [2023-09-01 15:10:23,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 131 transitions, 278 flow [2023-09-01 15:10:23,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:23,578 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 15:10:23,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:23,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:23,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 118 transitions, 248 flow [2023-09-01 15:10:23,614 INFO L130 PetriNetUnfolder]: 8/118 cut-off events. [2023-09-01 15:10:23,614 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:23,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 8/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-09-01 15:10:23,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922 [2023-09-01 15:10:28,334 INFO L134 LiptonReduction]: Checked pairs total: 4363 [2023-09-01 15:10:28,334 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-09-01 15:10:28,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 15:10:28,350 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;@455444b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 15:10:28,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 15:10:28,358 INFO L130 PetriNetUnfolder]: 5/29 cut-off events. [2023-09-01 15:10:28,359 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 15:10:28,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:28,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:28,360 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 15:10:28,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash -616360160, now seen corresponding path program 1 times [2023-09-01 15:10:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:28,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562554496] [2023-09-01 15:10:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:28,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:28,619 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 15:10:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562554496] [2023-09-01 15:10:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562554496] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:28,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:28,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:10:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689551726] [2023-09-01 15:10:28,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:28,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:28,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:28,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:28,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 224 [2023-09-01 15:10:28,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 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 15:10:28,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:28,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 224 [2023-09-01 15:10:28,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:28,833 INFO L130 PetriNetUnfolder]: 219/470 cut-off events. [2023-09-01 15:10:28,836 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 15:10:28,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 470 events. 219/470 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2196 event pairs, 87 based on Foata normal form. 28/432 useless extension candidates. Maximal degree in co-relation 772. Up to 225 conditions per place. [2023-09-01 15:10:28,844 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 34 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-09-01 15:10:28,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 173 flow [2023-09-01 15:10:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-09-01 15:10:28,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2023-09-01 15:10:28,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-09-01 15:10:28,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-09-01 15:10:28,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:28,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-09-01 15:10:28,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 15:10:28,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:28,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:28,878 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 390 transitions. [2023-09-01 15:10:28,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 173 flow [2023-09-01 15:10:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 163 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 15:10:28,883 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 74 flow [2023-09-01 15:10:28,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-09-01 15:10:28,887 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-09-01 15:10:28,887 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 74 flow [2023-09-01 15:10:28,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 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 15:10:28,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:28,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:28,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 15:10:28,889 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 15:10:28,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2115918277, now seen corresponding path program 1 times [2023-09-01 15:10:28,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976121056] [2023-09-01 15:10:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976121056] [2023-09-01 15:10:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976121056] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:28,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:28,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:10:28,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516455252] [2023-09-01 15:10:28,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:28,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:28,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 224 [2023-09-01 15:10:28,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 15:10:28,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:28,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 224 [2023-09-01 15:10:28,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:29,091 INFO L130 PetriNetUnfolder]: 357/694 cut-off events. [2023-09-01 15:10:29,091 INFO L131 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2023-09-01 15:10:29,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 694 events. 357/694 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3192 event pairs, 141 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 442. Up to 347 conditions per place. [2023-09-01 15:10:29,095 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-09-01 15:10:29,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 191 flow [2023-09-01 15:10:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-09-01 15:10:29,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2023-09-01 15:10:29,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-09-01 15:10:29,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-09-01 15:10:29,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:29,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-09-01 15:10:29,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:10:29,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:29,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:29,104 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 74 flow. Second operand 3 states and 388 transitions. [2023-09-01 15:10:29,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 191 flow [2023-09-01 15:10:29,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:29,107 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2023-09-01 15:10:29,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-09-01 15:10:29,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-09-01 15:10:29,108 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2023-09-01 15:10:29,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 15:10:29,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:29,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:29,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 15:10:29,109 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 15:10:29,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 26892520, now seen corresponding path program 1 times [2023-09-01 15:10:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:29,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423392426] [2023-09-01 15:10:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:29,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423392426] [2023-09-01 15:10:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423392426] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:29,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:29,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 15:10:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294591090] [2023-09-01 15:10:29,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:29,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:29,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:29,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-09-01 15:10:29,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 15:10:29,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:29,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-09-01 15:10:29,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:29,430 INFO L130 PetriNetUnfolder]: 309/688 cut-off events. [2023-09-01 15:10:29,431 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 15:10:29,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 688 events. 309/688 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3367 event pairs, 105 based on Foata normal form. 80/740 useless extension candidates. Maximal degree in co-relation 413. Up to 316 conditions per place. [2023-09-01 15:10:29,434 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-09-01 15:10:29,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 183 flow [2023-09-01 15:10:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-09-01 15:10:29,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2023-09-01 15:10:29,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-09-01 15:10:29,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-09-01 15:10:29,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:29,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-09-01 15:10:29,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 15:10:29,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:29,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:29,440 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 3 states and 370 transitions. [2023-09-01 15:10:29,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 183 flow [2023-09-01 15:10:29,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:29,443 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 102 flow [2023-09-01 15:10:29,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-09-01 15:10:29,445 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-09-01 15:10:29,445 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 102 flow [2023-09-01 15:10:29,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 15:10:29,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:29,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 15:10:29,446 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 15:10:29,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1826989588, now seen corresponding path program 2 times [2023-09-01 15:10:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:29,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278901083] [2023-09-01 15:10:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278901083] [2023-09-01 15:10:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278901083] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:29,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545135382] [2023-09-01 15:10:29,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:10:29,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:29,565 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 15:10:29,585 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 15:10:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:10:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 15:10:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:29,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:10:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545135382] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:29,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-09-01 15:10:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231182987] [2023-09-01 15:10:29,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:29,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 15:10:29,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 15:10:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 15:10:29,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 224 [2023-09-01 15:10:29,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 117.71428571428571) internal successors, (824), 7 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 15:10:29,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:29,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 224 [2023-09-01 15:10:29,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:30,161 INFO L130 PetriNetUnfolder]: 509/1236 cut-off events. [2023-09-01 15:10:30,161 INFO L131 PetriNetUnfolder]: For 350/356 co-relation queries the response was YES. [2023-09-01 15:10:30,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 1236 events. 509/1236 cut-off events. For 350/356 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6749 event pairs, 42 based on Foata normal form. 96/1274 useless extension candidates. Maximal degree in co-relation 673. Up to 246 conditions per place. [2023-09-01 15:10:30,169 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 113 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2023-09-01 15:10:30,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 147 transitions, 789 flow [2023-09-01 15:10:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 15:10:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 15:10:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1606 transitions. [2023-09-01 15:10:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551510989010989 [2023-09-01 15:10:30,175 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1606 transitions. [2023-09-01 15:10:30,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1606 transitions. [2023-09-01 15:10:30,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:30,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1606 transitions. [2023-09-01 15:10:30,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 123.53846153846153) internal successors, (1606), 13 states have internal predecessors, (1606), 0 states have call successors, (0), 0 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 15:10:30,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 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 15:10:30,188 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 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 15:10:30,188 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 102 flow. Second operand 13 states and 1606 transitions. [2023-09-01 15:10:30,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 147 transitions, 789 flow [2023-09-01 15:10:30,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 147 transitions, 721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 15:10:30,195 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 325 flow [2023-09-01 15:10:30,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=325, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-09-01 15:10:30,197 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2023-09-01 15:10:30,197 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 325 flow [2023-09-01 15:10:30,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.71428571428571) internal successors, (824), 7 states have internal predecessors, (824), 0 states have call successors, (0), 0 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 15:10:30,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:30,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:30,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:30,413 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 15:10:30,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1311970565, now seen corresponding path program 3 times [2023-09-01 15:10:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:30,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469514620] [2023-09-01 15:10:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:30,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 15:10:30,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:30,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469514620] [2023-09-01 15:10:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469514620] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:30,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712723038] [2023-09-01 15:10:30,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:10:30,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:30,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:30,510 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 15:10:30,532 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 15:10:30,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:10:30,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:30,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 15:10:30,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 15:10:30,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:10:30,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712723038] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:30,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 15:10:30,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-09-01 15:10:30,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956708759] [2023-09-01 15:10:30,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:30,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 15:10:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 15:10:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-09-01 15:10:30,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 224 [2023-09-01 15:10:30,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 15:10:30,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:30,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 224 [2023-09-01 15:10:30,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:30,967 INFO L130 PetriNetUnfolder]: 738/1551 cut-off events. [2023-09-01 15:10:30,967 INFO L131 PetriNetUnfolder]: For 2861/2861 co-relation queries the response was YES. [2023-09-01 15:10:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4427 conditions, 1551 events. 738/1551 cut-off events. For 2861/2861 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7834 event pairs, 143 based on Foata normal form. 0/1435 useless extension candidates. Maximal degree in co-relation 3198. Up to 591 conditions per place. [2023-09-01 15:10:30,988 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 88 selfloop transitions, 8 changer transitions 1/100 dead transitions. [2023-09-01 15:10:30,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 100 transitions, 773 flow [2023-09-01 15:10:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 618 transitions. [2023-09-01 15:10:30,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2023-09-01 15:10:30,992 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 618 transitions. [2023-09-01 15:10:30,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 618 transitions. [2023-09-01 15:10:30,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:30,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 618 transitions. [2023-09-01 15:10:30,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.6) internal successors, (618), 5 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 15:10:30,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 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 15:10:30,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 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 15:10:30,996 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 325 flow. Second operand 5 states and 618 transitions. [2023-09-01 15:10:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 100 transitions, 773 flow [2023-09-01 15:10:31,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 100 transitions, 721 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 15:10:31,007 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 345 flow [2023-09-01 15:10:31,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-09-01 15:10:31,009 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2023-09-01 15:10:31,010 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 345 flow [2023-09-01 15:10:31,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 15:10:31,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:31,010 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:31,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 15:10:31,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:31,217 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 15:10:31,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1361604361, now seen corresponding path program 4 times [2023-09-01 15:10:31,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:31,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984559971] [2023-09-01 15:10:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:31,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 15:10:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984559971] [2023-09-01 15:10:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984559971] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158971985] [2023-09-01 15:10:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:10:31,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:31,322 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 15:10:31,325 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 15:10:31,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:10:31,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:31,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 15:10:31,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 15:10:31,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 15:10:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158971985] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:31,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:31,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-09-01 15:10:31,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785994877] [2023-09-01 15:10:31,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:31,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 15:10:31,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 15:10:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-09-01 15:10:31,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 224 [2023-09-01 15:10:31,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 345 flow. Second operand has 6 states, 6 states have (on average 121.66666666666667) internal successors, (730), 6 states have internal predecessors, (730), 0 states have call successors, (0), 0 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 15:10:31,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:31,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 224 [2023-09-01 15:10:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:31,733 INFO L130 PetriNetUnfolder]: 639/1480 cut-off events. [2023-09-01 15:10:31,733 INFO L131 PetriNetUnfolder]: For 3086/3104 co-relation queries the response was YES. [2023-09-01 15:10:31,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 1480 events. 639/1480 cut-off events. For 3086/3104 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 7912 event pairs, 118 based on Foata normal form. 46/1518 useless extension candidates. Maximal degree in co-relation 3476. Up to 310 conditions per place. [2023-09-01 15:10:31,744 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 75 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2023-09-01 15:10:31,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 99 transitions, 737 flow [2023-09-01 15:10:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 15:10:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 15:10:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2023-09-01 15:10:31,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705357142857143 [2023-09-01 15:10:31,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2023-09-01 15:10:31,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2023-09-01 15:10:31,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:31,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2023-09-01 15:10:31,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 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 15:10:31,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 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 15:10:31,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 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 15:10:31,751 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 345 flow. Second operand 5 states and 639 transitions. [2023-09-01 15:10:31,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 99 transitions, 737 flow [2023-09-01 15:10:31,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 737 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 15:10:31,759 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 389 flow [2023-09-01 15:10:31,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-09-01 15:10:31,760 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-09-01 15:10:31,760 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 389 flow [2023-09-01 15:10:31,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.66666666666667) internal successors, (730), 6 states have internal predecessors, (730), 0 states have call successors, (0), 0 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 15:10:31,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:31,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:31,776 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 15:10:31,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:31,976 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 15:10:31,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1041839656, now seen corresponding path program 5 times [2023-09-01 15:10:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029755098] [2023-09-01 15:10:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-09-01 15:10:32,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:32,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029755098] [2023-09-01 15:10:32,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029755098] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 15:10:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 15:10:32,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416319858] [2023-09-01 15:10:32,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:32,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 15:10:32,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 15:10:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 15:10:32,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 224 [2023-09-01 15:10:32,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 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 15:10:32,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:32,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 224 [2023-09-01 15:10:32,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:32,152 INFO L130 PetriNetUnfolder]: 443/996 cut-off events. [2023-09-01 15:10:32,152 INFO L131 PetriNetUnfolder]: For 2516/2525 co-relation queries the response was YES. [2023-09-01 15:10:32,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3371 conditions, 996 events. 443/996 cut-off events. For 2516/2525 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4688 event pairs, 118 based on Foata normal form. 47/1036 useless extension candidates. Maximal degree in co-relation 2922. Up to 664 conditions per place. [2023-09-01 15:10:32,160 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 49 selfloop transitions, 3 changer transitions 3/61 dead transitions. [2023-09-01 15:10:32,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 471 flow [2023-09-01 15:10:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 15:10:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 15:10:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-09-01 15:10:32,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669642857142857 [2023-09-01 15:10:32,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-09-01 15:10:32,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-09-01 15:10:32,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:32,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-09-01 15:10:32,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 15:10:32,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:32,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 15:10:32,165 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 389 flow. Second operand 3 states and 381 transitions. [2023-09-01 15:10:32,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 471 flow [2023-09-01 15:10:32,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 448 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-09-01 15:10:32,171 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 288 flow [2023-09-01 15:10:32,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-09-01 15:10:32,172 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2023-09-01 15:10:32,172 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 288 flow [2023-09-01 15:10:32,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 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 15:10:32,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:32,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 15:10:32,173 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 15:10:32,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash -872931202, now seen corresponding path program 6 times [2023-09-01 15:10:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537576633] [2023-09-01 15:10:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 15:10:32,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:32,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537576633] [2023-09-01 15:10:32,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537576633] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:32,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100677535] [2023-09-01 15:10:32,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:10:32,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:32,302 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 15:10:32,327 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 15:10:32,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 15:10:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:10:32,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 15:10:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-09-01 15:10:32,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 15:10:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100677535] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 15:10:32,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 15:10:32,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-09-01 15:10:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195570110] [2023-09-01 15:10:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 15:10:32,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 15:10:32,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 15:10:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-09-01 15:10:32,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 224 [2023-09-01 15:10:32,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 288 flow. Second operand has 6 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 15:10:32,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:32,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 224 [2023-09-01 15:10:32,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:32,755 INFO L130 PetriNetUnfolder]: 472/1003 cut-off events. [2023-09-01 15:10:32,755 INFO L131 PetriNetUnfolder]: For 1814/1814 co-relation queries the response was YES. [2023-09-01 15:10:32,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3336 conditions, 1003 events. 472/1003 cut-off events. For 1814/1814 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4334 event pairs, 123 based on Foata normal form. 18/1021 useless extension candidates. Maximal degree in co-relation 1477. Up to 429 conditions per place. [2023-09-01 15:10:32,762 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 65 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2023-09-01 15:10:32,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 580 flow [2023-09-01 15:10:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 15:10:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 15:10:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-09-01 15:10:32,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-09-01 15:10:32,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-09-01 15:10:32,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-09-01 15:10:32,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:32,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-09-01 15:10:32,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 15:10:32,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 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 15:10:32,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 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 15:10:32,772 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 288 flow. Second operand 6 states and 708 transitions. [2023-09-01 15:10:32,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 580 flow [2023-09-01 15:10:32,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 574 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 15:10:32,778 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 332 flow [2023-09-01 15:10:32,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-09-01 15:10:32,780 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-09-01 15:10:32,780 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 332 flow [2023-09-01 15:10:32,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 15:10:32,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:32,780 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:32,790 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 15:10:32,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:32,987 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:32,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2055301186, now seen corresponding path program 7 times [2023-09-01 15:10:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:32,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853428361] [2023-09-01 15:10:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 15:10:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:10:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853428361] [2023-09-01 15:10:33,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853428361] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:10:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615237951] [2023-09-01 15:10:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:10:33,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:10:33,215 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 15:10:33,234 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 15:10:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:10:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 15:10:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:10:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 15:10:33,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:10:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 15:10:33,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615237951] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:10:33,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:10:33,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-09-01 15:10:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097821624] [2023-09-01 15:10:33,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:10:33,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 15:10:33,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:10:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 15:10:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-09-01 15:10:33,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 224 [2023-09-01 15:10:33,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 15:10:33,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:10:33,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 224 [2023-09-01 15:10:33,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:10:33,682 INFO L130 PetriNetUnfolder]: 325/706 cut-off events. [2023-09-01 15:10:33,683 INFO L131 PetriNetUnfolder]: For 1613/1613 co-relation queries the response was YES. [2023-09-01 15:10:33,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2558 conditions, 706 events. 325/706 cut-off events. For 1613/1613 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2564 event pairs, 90 based on Foata normal form. 22/728 useless extension candidates. Maximal degree in co-relation 1227. Up to 300 conditions per place. [2023-09-01 15:10:33,688 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 59 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2023-09-01 15:10:33,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 534 flow [2023-09-01 15:10:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 15:10:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 15:10:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2023-09-01 15:10:33,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252976190476191 [2023-09-01 15:10:33,691 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2023-09-01 15:10:33,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2023-09-01 15:10:33,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:10:33,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2023-09-01 15:10:33,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 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 15:10:33,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 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 15:10:33,705 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 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 15:10:33,706 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 332 flow. Second operand 6 states and 706 transitions. [2023-09-01 15:10:33,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 534 flow [2023-09-01 15:10:33,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 500 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-09-01 15:10:33,710 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 265 flow [2023-09-01 15:10:33,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2023-09-01 15:10:33,711 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2023-09-01 15:10:33,711 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 265 flow [2023-09-01 15:10:33,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 15:10:33,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:10:33,712 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:10:33,726 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 15:10:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:10:33,918 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:10:33,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:10:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1629587720, now seen corresponding path program 8 times [2023-09-01 15:10:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:10:33,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016497330] [2023-09-01 15:10:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:10:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:10:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 15:10:33,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 15:10:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 15:10:33,996 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 15:10:33,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 15:10:33,997 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 15:10:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 15:10:33,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 15:10:34,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 15:10:34,000 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2023-09-01 15:10:34,004 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 15:10:34,004 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 15:10:34,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 03:10:34 BasicIcfg [2023-09-01 15:10:34,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 15:10:34,068 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 15:10:34,068 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 15:10:34,068 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 15:10:34,069 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:10:23" (3/4) ... [2023-09-01 15:10:34,070 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-09-01 15:10:34,124 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 15:10:34,125 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 15:10:34,125 INFO L158 Benchmark]: Toolchain (without parser) took 12004.31ms. Allocated memory was 88.1MB in the beginning and 167.8MB in the end (delta: 79.7MB). Free memory was 63.6MB in the beginning and 96.5MB in the end (delta: -33.0MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,126 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 69.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 15:10:34,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 571.27ms. Allocated memory is still 88.1MB. Free memory was 63.3MB in the beginning and 58.7MB in the end (delta: 4.6MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.75ms. Allocated memory is still 88.1MB. Free memory was 58.7MB in the beginning and 56.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,126 INFO L158 Benchmark]: Boogie Preprocessor took 52.47ms. Allocated memory is still 88.1MB. Free memory was 56.6MB in the beginning and 54.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,127 INFO L158 Benchmark]: RCFGBuilder took 540.30ms. Allocated memory is still 88.1MB. Free memory was 54.8MB in the beginning and 63.0MB in the end (delta: -8.2MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,127 INFO L158 Benchmark]: TraceAbstraction took 10709.82ms. Allocated memory was 88.1MB in the beginning and 167.8MB in the end (delta: 79.7MB). Free memory was 62.2MB in the beginning and 107.0MB in the end (delta: -44.8MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,127 INFO L158 Benchmark]: Witness Printer took 57.02ms. Allocated memory is still 167.8MB. Free memory was 107.0MB in the beginning and 96.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 15:10:34,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 69.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 571.27ms. Allocated memory is still 88.1MB. Free memory was 63.3MB in the beginning and 58.7MB in the end (delta: 4.6MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.75ms. Allocated memory is still 88.1MB. Free memory was 58.7MB in the beginning and 56.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.47ms. Allocated memory is still 88.1MB. Free memory was 56.6MB in the beginning and 54.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 540.30ms. Allocated memory is still 88.1MB. Free memory was 54.8MB in the beginning and 63.0MB in the end (delta: -8.2MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. * TraceAbstraction took 10709.82ms. Allocated memory was 88.1MB in the beginning and 167.8MB in the end (delta: 79.7MB). Free memory was 62.2MB in the beginning and 107.0MB in the end (delta: -44.8MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. * Witness Printer took 57.02ms. Allocated memory is still 167.8MB. Free memory was 107.0MB in the beginning and 96.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 117 PlacesBefore, 32 PlacesAfterwards, 118 TransitionsBefore, 30 TransitionsAfterwards, 1922 CoEnabledTransitionPairs, 7 FixpointIterations, 53 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 93 TotalNumberOfCompositions, 4363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2172, independent: 2001, independent conditional: 0, independent unconditional: 2001, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1031, independent: 1001, independent conditional: 0, independent unconditional: 1001, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2172, independent: 1000, independent conditional: 0, independent unconditional: 1000, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 1031, unknown conditional: 0, unknown unconditional: 1031] , Statistics on independence cache: Total cache size (in pairs): 118, Positive cache size: 105, Positive conditional cache size: 0, Positive unconditional cache size: 105, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 919]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L870] 0 int num; [L871] 0 unsigned long total; [L872] 0 int flag; [L873] 0 pthread_mutex_t m; [L874] 0 pthread_cond_t empty, full; [L907] 0 pthread_t t1, t2; [L908] 0 num = 0 [L909] 0 total = 0 [L913] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [arg={0:0}, empty={4:0}, flag=0, full={5:0}, m={3:0}, num=0, pthread_create(&t1, 0, thread1, 0)=-1, t1={7:0}, t2={6:0}, total=0] [L876] 1 int i; [L877] 1 i = 0 VAL [arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=0, m={3:0}, num=0, total=0] [L878] COND TRUE 1 i < 3 [L914] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=0, m={3:0}, num=0, pthread_create(&t2, 0, thread2, 0)=0, t1={7:0}, t2={6:0}, total=0] [L880] COND FALSE 1 !(num > 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=0, m={3:0}, num=0, total=0] [L915] 0 \read(t1) VAL [\read(t1)=-1, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=0, m={3:0}, num=0, t1={7:0}, t2={6:0}, total=0] [L890] 2 int j; [L891] 2 j = 0 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=0, j=0, m={3:0}, num=0, total=0] [L882] 1 num++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=0, j=0, m={3:0}, num=1, total=0] [L885] 1 i++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=1, j=0, m={3:0}, num=1, total=0] [L892] COND TRUE 2 j < 3 [L894] COND FALSE 2 !(num == 0) [L896] 2 total = total + j VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=1, j=0, m={3:0}, num=1, total=0] [L897] 2 num-- VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=1, j=0, m={3:0}, num=0, total=0] [L900] 2 j++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=1, j=1, m={3:0}, num=0, total=0] [L878] COND TRUE 1 i < 3 [L880] COND FALSE 1 !(num > 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=1, j=1, m={3:0}, num=0, total=0] [L882] 1 num++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=1, j=1, m={3:0}, num=1, total=0] [L885] 1 i++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=2, j=1, m={3:0}, num=1, total=0] [L892] COND TRUE 2 j < 3 [L894] COND FALSE 2 !(num == 0) [L896] 2 total = total + j VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=2, j=1, m={3:0}, num=1, total=1] [L897] 2 num-- VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=2, j=1, m={3:0}, num=0, total=1] [L900] 2 j++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=2, j=2, m={3:0}, num=0, total=1] [L878] COND TRUE 1 i < 3 [L880] COND FALSE 1 !(num > 0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=2, j=2, m={3:0}, num=0, total=1] [L882] 1 num++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=2, j=2, m={3:0}, num=1, total=1] [L885] 1 i++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=3, j=2, m={3:0}, num=1, total=1] [L892] COND TRUE 2 j < 3 [L894] COND FALSE 2 !(num == 0) [L896] 2 total = total + j VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=3, j=2, m={3:0}, num=1, total=3] [L878] COND FALSE 1 !(i < 3) [L887] 1 return ((void *)0); [L915] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\read(t1)=-1, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=3, j=2, m={3:0}, num=1, t1={7:0}, t2={6:0}, total=3] [L916] 0 \read(t2) VAL [\read(t2)=0, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=3, j=2, m={3:0}, num=1, t1={7:0}, t2={6:0}, total=3] [L897] 2 num-- VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=3, j=2, m={3:0}, num=0, total=3] [L900] 2 j++ VAL [\result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=0, full={5:0}, i=3, j=3, m={3:0}, num=0, total=3] [L892] COND FALSE 2 !(j < 3) [L902] 2 total = total + j [L903] 2 flag = 1 [L904] 2 return ((void *)0); [L916] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\read(t2)=0, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=1, full={5:0}, i=3, j=3, m={3:0}, num=0, t1={7:0}, t2={6:0}, total=6] [L917] COND TRUE 0 \read(flag) [L918] COND FALSE 0 !(total != ((3 * (3 + 1)) / 2)) [L919] 0 reach_error() VAL [\result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, empty={4:0}, flag=1, full={5:0}, i=3, j=3, m={3:0}, num=0, t1={7:0}, t2={6:0}, total=6] - UnprovableResult [Line: 914]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 913]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.5s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 477 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 369 mSDsluCounter, 67 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 43 mSDsCounter, 56 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1184 IncrementalHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 56 mSolverCounterUnsat, 24 mSDtfsCounter, 1184 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 341 GetRequests, 287 SyntacticMatches, 15 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=389occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 510 NumberOfCodeBlocks, 501 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 554 ConstructedInterpolants, 0 QuantifiedInterpolants, 1264 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1392 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 273/350 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-09-01 15:10:34,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE