./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.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 e02ca79ae11b312cb156178ccd52c5da7b51884a938996d16b5a625457869bce --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:31:41,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:31:41,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:31:41,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:31:41,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:31:41,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:31:41,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:31:41,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:31:41,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:31:41,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:31:41,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:31:41,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:31:41,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:31:41,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:31:41,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:31:41,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:31:41,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:31:41,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:31:41,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:31:41,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:31:41,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:31:41,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:31:41,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:31:41,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:31:41,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:31:41,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:31:41,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:31:41,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:31:41,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:31:41,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:31:41,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:31:41,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:31:41,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:31:41,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:31:41,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:31:41,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:31:41,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:31:41,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:31:41,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:31:41,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:31:41,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:31:41,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:31:41,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:31:41,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:31:41,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:31:41,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:31:41,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:31:41,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:31:41,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:31:41,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:31:41,922 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:31:41,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:31:41,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:31:41,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:31:41,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:31:41,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:31:41,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:31:41,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:31:41,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:31:41,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:31:41,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:31:41,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:31:41,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:31:41,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:31:41,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:31:41,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:31:41,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:31:41,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:31:41,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:31:41,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:31:41,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:31:41,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:31:41,927 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:31:41,927 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:31:41,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:31:41,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:31:41,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e02ca79ae11b312cb156178ccd52c5da7b51884a938996d16b5a625457869bce [2021-12-22 13:31:42,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:31:42,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:31:42,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:31:42,130 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:31:42,131 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:31:42,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2021-12-22 13:31:42,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7aa18c6/a8fbd0f895424de498daaae51655e0fc/FLAGdca6e2cbe [2021-12-22 13:31:42,619 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:31:42,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2021-12-22 13:31:42,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7aa18c6/a8fbd0f895424de498daaae51655e0fc/FLAGdca6e2cbe [2021-12-22 13:31:42,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7aa18c6/a8fbd0f895424de498daaae51655e0fc [2021-12-22 13:31:42,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:31:42,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:31:42,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:31:42,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:31:42,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:31:42,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:31:42" (1/1) ... [2021-12-22 13:31:42,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a55cbb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:42, skipping insertion in model container [2021-12-22 13:31:42,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:31:42" (1/1) ... [2021-12-22 13:31:42,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:31:42,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:31:42,853 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2021-12-22 13:31:42,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:31:43,003 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:31:43,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2021-12-22 13:31:43,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:31:43,090 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:31:43,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43 WrapperNode [2021-12-22 13:31:43,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:31:43,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:31:43,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:31:43,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:31:43,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,151 INFO L137 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2021-12-22 13:31:43,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:31:43,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:31:43,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:31:43,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:31:43,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:31:43,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:31:43,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:31:43,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:31:43,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (1/1) ... [2021-12-22 13:31:43,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:31:43,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:31:43,233 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) [2021-12-22 13:31:43,237 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 [2021-12-22 13:31:43,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:31:43,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:31:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:31:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:31:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:31:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-22 13:31:43,264 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-22 13:31:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-22 13:31:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-22 13:31:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-22 13:31:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-22 13:31:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:31:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:31:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:31:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:31:43,267 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:31:43,348 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:31:43,350 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:31:43,464 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:31:43,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:31:43,470 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:31:43,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:43 BoogieIcfgContainer [2021-12-22 13:31:43,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:31:43,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:31:43,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:31:43,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:31:43,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:31:42" (1/3) ... [2021-12-22 13:31:43,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3e69fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:31:43, skipping insertion in model container [2021-12-22 13:31:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:43" (2/3) ... [2021-12-22 13:31:43,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3e69fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:31:43, skipping insertion in model container [2021-12-22 13:31:43,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:43" (3/3) ... [2021-12-22 13:31:43,479 INFO L111 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2021-12-22 13:31:43,484 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:31:43,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:31:43,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:31:43,484 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:31:43,516 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,516 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,517 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,517 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,517 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,518 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,518 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,518 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,519 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,519 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,519 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,520 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,520 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,520 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,520 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,521 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,521 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,521 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,521 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,522 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,522 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,522 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,523 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,523 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,524 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,524 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,524 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,524 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,524 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,525 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,525 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,525 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,526 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,526 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,526 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,526 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,529 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,530 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,530 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,530 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,533 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,533 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,533 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,533 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,534 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,535 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,535 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,535 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:31:43,536 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-22 13:31:43,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:31:43,629 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:31:43,629 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 13:31:43,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 90 transitions, 195 flow [2021-12-22 13:31:43,712 INFO L129 PetriNetUnfolder]: 2/87 cut-off events. [2021-12-22 13:31:43,717 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:31:43,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 87 events. 2/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2021-12-22 13:31:43,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 90 transitions, 195 flow [2021-12-22 13:31:43,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 73 transitions, 155 flow [2021-12-22 13:31:43,759 INFO L129 PetriNetUnfolder]: 1/72 cut-off events. [2021-12-22 13:31:43,759 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:31:43,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:43,760 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:43,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1346493370, now seen corresponding path program 1 times [2021-12-22 13:31:43,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:43,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170002440] [2021-12-22 13:31:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:43,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:44,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:44,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170002440] [2021-12-22 13:31:44,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170002440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:44,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:44,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:44,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360312727] [2021-12-22 13:31:44,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:44,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:44,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:44,304 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 90 [2021-12-22 13:31:44,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 155 flow. Second operand has 7 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:44,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 90 [2021-12-22 13:31:44,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:44,712 INFO L129 PetriNetUnfolder]: 163/548 cut-off events. [2021-12-22 13:31:44,712 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-12-22 13:31:44,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 548 events. 163/548 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3071 event pairs, 29 based on Foata normal form. 20/550 useless extension candidates. Maximal degree in co-relation 843. Up to 107 conditions per place. [2021-12-22 13:31:44,728 INFO L132 encePairwiseOnDemand]: 79/90 looper letters, 20 selfloop transitions, 6 changer transitions 35/117 dead transitions. [2021-12-22 13:31:44,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 371 flow [2021-12-22 13:31:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:31:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:31:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 977 transitions. [2021-12-22 13:31:44,755 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350427350427351 [2021-12-22 13:31:44,756 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 977 transitions. [2021-12-22 13:31:44,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 977 transitions. [2021-12-22 13:31:44,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:44,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 977 transitions. [2021-12-22 13:31:44,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.15384615384616) internal successors, (977), 13 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 90.0) internal successors, (1260), 14 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,780 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 90.0) internal successors, (1260), 14 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,782 INFO L186 Difference]: Start difference. First operand has 82 places, 73 transitions, 155 flow. Second operand 13 states and 977 transitions. [2021-12-22 13:31:44,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 371 flow [2021-12-22 13:31:44,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 366 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:31:44,793 INFO L242 Difference]: Finished difference. Result has 102 places, 74 transitions, 211 flow [2021-12-22 13:31:44,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=211, PETRI_PLACES=102, PETRI_TRANSITIONS=74} [2021-12-22 13:31:44,799 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 20 predicate places. [2021-12-22 13:31:44,799 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 211 flow [2021-12-22 13:31:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:44,801 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:44,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:31:44,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:44,805 INFO L85 PathProgramCache]: Analyzing trace with hash -794468059, now seen corresponding path program 1 times [2021-12-22 13:31:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:44,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456675695] [2021-12-22 13:31:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:44,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:44,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456675695] [2021-12-22 13:31:44,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456675695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:44,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:44,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:44,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839145202] [2021-12-22 13:31:44,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:44,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:44,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:44,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:44,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 90 [2021-12-22 13:31:44,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 74 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:44,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:44,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 90 [2021-12-22 13:31:44,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,229 INFO L129 PetriNetUnfolder]: 87/382 cut-off events. [2021-12-22 13:31:45,229 INFO L130 PetriNetUnfolder]: For 664/706 co-relation queries the response was YES. [2021-12-22 13:31:45,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 382 events. 87/382 cut-off events. For 664/706 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1903 event pairs, 15 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 978. Up to 82 conditions per place. [2021-12-22 13:31:45,234 INFO L132 encePairwiseOnDemand]: 82/90 looper letters, 24 selfloop transitions, 5 changer transitions 34/119 dead transitions. [2021-12-22 13:31:45,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 119 transitions, 625 flow [2021-12-22 13:31:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 13:31:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-22 13:31:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 968 transitions. [2021-12-22 13:31:45,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273504273504273 [2021-12-22 13:31:45,238 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 968 transitions. [2021-12-22 13:31:45,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 968 transitions. [2021-12-22 13:31:45,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 968 transitions. [2021-12-22 13:31:45,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.46153846153847) internal successors, (968), 13 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 90.0) internal successors, (1260), 14 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,246 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 90.0) internal successors, (1260), 14 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,246 INFO L186 Difference]: Start difference. First operand has 102 places, 74 transitions, 211 flow. Second operand 13 states and 968 transitions. [2021-12-22 13:31:45,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 119 transitions, 625 flow [2021-12-22 13:31:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 119 transitions, 551 flow, removed 24 selfloop flow, removed 8 redundant places. [2021-12-22 13:31:45,256 INFO L242 Difference]: Finished difference. Result has 109 places, 76 transitions, 256 flow [2021-12-22 13:31:45,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=256, PETRI_PLACES=109, PETRI_TRANSITIONS=76} [2021-12-22 13:31:45,257 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 27 predicate places. [2021-12-22 13:31:45,257 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 76 transitions, 256 flow [2021-12-22 13:31:45,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.85714285714286) internal successors, (503), 7 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,258 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:45,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:31:45,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 922449318, now seen corresponding path program 1 times [2021-12-22 13:31:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783003650] [2021-12-22 13:31:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:45,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:45,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783003650] [2021-12-22 13:31:45,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783003650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:45,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:45,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:31:45,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928933452] [2021-12-22 13:31:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:45,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:31:45,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:31:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:31:45,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 90 [2021-12-22 13:31:45,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 76 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:45,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 90 [2021-12-22 13:31:45,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,552 INFO L129 PetriNetUnfolder]: 30/229 cut-off events. [2021-12-22 13:31:45,552 INFO L130 PetriNetUnfolder]: For 561/583 co-relation queries the response was YES. [2021-12-22 13:31:45,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 229 events. 30/229 cut-off events. For 561/583 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 887 event pairs, 7 based on Foata normal form. 5/226 useless extension candidates. Maximal degree in co-relation 577. Up to 50 conditions per place. [2021-12-22 13:31:45,554 INFO L132 encePairwiseOnDemand]: 83/90 looper letters, 18 selfloop transitions, 4 changer transitions 19/100 dead transitions. [2021-12-22 13:31:45,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 100 transitions, 540 flow [2021-12-22 13:31:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:31:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:31:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 695 transitions. [2021-12-22 13:31:45,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8580246913580247 [2021-12-22 13:31:45,558 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 695 transitions. [2021-12-22 13:31:45,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 695 transitions. [2021-12-22 13:31:45,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 695 transitions. [2021-12-22 13:31:45,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.22222222222223) internal successors, (695), 9 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,562 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,563 INFO L186 Difference]: Start difference. First operand has 109 places, 76 transitions, 256 flow. Second operand 9 states and 695 transitions. [2021-12-22 13:31:45,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 100 transitions, 540 flow [2021-12-22 13:31:45,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 494 flow, removed 21 selfloop flow, removed 4 redundant places. [2021-12-22 13:31:45,574 INFO L242 Difference]: Finished difference. Result has 111 places, 79 transitions, 309 flow [2021-12-22 13:31:45,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=309, PETRI_PLACES=111, PETRI_TRANSITIONS=79} [2021-12-22 13:31:45,577 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 29 predicate places. [2021-12-22 13:31:45,577 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 79 transitions, 309 flow [2021-12-22 13:31:45,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,580 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:45,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:31:45,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1126534492, now seen corresponding path program 1 times [2021-12-22 13:31:45,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782313745] [2021-12-22 13:31:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:45,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:45,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782313745] [2021-12-22 13:31:45,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782313745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:45,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:45,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:45,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499756258] [2021-12-22 13:31:45,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:45,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:45,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:45,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:45,725 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 90 [2021-12-22 13:31:45,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 79 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:45,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 90 [2021-12-22 13:31:45,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:45,855 INFO L129 PetriNetUnfolder]: 22/195 cut-off events. [2021-12-22 13:31:45,856 INFO L130 PetriNetUnfolder]: For 576/746 co-relation queries the response was YES. [2021-12-22 13:31:45,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 195 events. 22/195 cut-off events. For 576/746 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 721 event pairs, 1 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 547. Up to 36 conditions per place. [2021-12-22 13:31:45,858 INFO L132 encePairwiseOnDemand]: 81/90 looper letters, 22 selfloop transitions, 10 changer transitions 11/99 dead transitions. [2021-12-22 13:31:45,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 99 transitions, 562 flow [2021-12-22 13:31:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 740 transitions. [2021-12-22 13:31:45,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8222222222222222 [2021-12-22 13:31:45,861 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 740 transitions. [2021-12-22 13:31:45,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 740 transitions. [2021-12-22 13:31:45,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:45,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 740 transitions. [2021-12-22 13:31:45,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.0) internal successors, (740), 10 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,866 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,866 INFO L186 Difference]: Start difference. First operand has 111 places, 79 transitions, 309 flow. Second operand 10 states and 740 transitions. [2021-12-22 13:31:45,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 99 transitions, 562 flow [2021-12-22 13:31:45,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 99 transitions, 511 flow, removed 23 selfloop flow, removed 10 redundant places. [2021-12-22 13:31:45,874 INFO L242 Difference]: Finished difference. Result has 112 places, 81 transitions, 349 flow [2021-12-22 13:31:45,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=349, PETRI_PLACES=112, PETRI_TRANSITIONS=81} [2021-12-22 13:31:45,875 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 30 predicate places. [2021-12-22 13:31:45,876 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 81 transitions, 349 flow [2021-12-22 13:31:45,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:45,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:45,876 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:31:45,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -986856187, now seen corresponding path program 1 times [2021-12-22 13:31:45,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:45,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828754968] [2021-12-22 13:31:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:45,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:46,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:46,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828754968] [2021-12-22 13:31:46,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828754968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:46,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:46,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:31:46,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733539364] [2021-12-22 13:31:46,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:46,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:31:46,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:31:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:31:46,016 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 90 [2021-12-22 13:31:46,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 81 transitions, 349 flow. Second operand has 8 states, 8 states have (on average 71.875) internal successors, (575), 8 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:46,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 90 [2021-12-22 13:31:46,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:46,129 INFO L129 PetriNetUnfolder]: 20/218 cut-off events. [2021-12-22 13:31:46,129 INFO L130 PetriNetUnfolder]: For 848/939 co-relation queries the response was YES. [2021-12-22 13:31:46,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 218 events. 20/218 cut-off events. For 848/939 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 869 event pairs, 4 based on Foata normal form. 6/216 useless extension candidates. Maximal degree in co-relation 600. Up to 25 conditions per place. [2021-12-22 13:31:46,131 INFO L132 encePairwiseOnDemand]: 81/90 looper letters, 21 selfloop transitions, 8 changer transitions 13/98 dead transitions. [2021-12-22 13:31:46,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 98 transitions, 608 flow [2021-12-22 13:31:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:31:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:31:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 597 transitions. [2021-12-22 13:31:46,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2021-12-22 13:31:46,134 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 597 transitions. [2021-12-22 13:31:46,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 597 transitions. [2021-12-22 13:31:46,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:46,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 597 transitions. [2021-12-22 13:31:46,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.625) internal successors, (597), 8 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 90.0) internal successors, (810), 9 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,137 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 90.0) internal successors, (810), 9 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,137 INFO L186 Difference]: Start difference. First operand has 112 places, 81 transitions, 349 flow. Second operand 8 states and 597 transitions. [2021-12-22 13:31:46,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 98 transitions, 608 flow [2021-12-22 13:31:46,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 98 transitions, 528 flow, removed 33 selfloop flow, removed 7 redundant places. [2021-12-22 13:31:46,143 INFO L242 Difference]: Finished difference. Result has 110 places, 78 transitions, 303 flow [2021-12-22 13:31:46,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=110, PETRI_TRANSITIONS=78} [2021-12-22 13:31:46,143 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 28 predicate places. [2021-12-22 13:31:46,144 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 78 transitions, 303 flow [2021-12-22 13:31:46,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.875) internal successors, (575), 8 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:46,144 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:46,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:31:46,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -163339865, now seen corresponding path program 2 times [2021-12-22 13:31:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905904064] [2021-12-22 13:31:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:46,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:46,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:46,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905904064] [2021-12-22 13:31:46,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905904064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:46,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:46,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:31:46,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105138268] [2021-12-22 13:31:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:46,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:31:46,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:31:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:31:46,256 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 90 [2021-12-22 13:31:46,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 78 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:46,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 90 [2021-12-22 13:31:46,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:46,394 INFO L129 PetriNetUnfolder]: 31/203 cut-off events. [2021-12-22 13:31:46,394 INFO L130 PetriNetUnfolder]: For 880/1042 co-relation queries the response was YES. [2021-12-22 13:31:46,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 203 events. 31/203 cut-off events. For 880/1042 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 3 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 589. Up to 26 conditions per place. [2021-12-22 13:31:46,396 INFO L132 encePairwiseOnDemand]: 80/90 looper letters, 16 selfloop transitions, 6 changer transitions 29/104 dead transitions. [2021-12-22 13:31:46,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 104 transitions, 666 flow [2021-12-22 13:31:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:31:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-22 13:31:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 794 transitions. [2021-12-22 13:31:46,398 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.802020202020202 [2021-12-22 13:31:46,398 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 794 transitions. [2021-12-22 13:31:46,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 794 transitions. [2021-12-22 13:31:46,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:46,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 794 transitions. [2021-12-22 13:31:46,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.18181818181819) internal successors, (794), 11 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 90.0) internal successors, (1080), 12 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,403 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 90.0) internal successors, (1080), 12 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,404 INFO L186 Difference]: Start difference. First operand has 110 places, 78 transitions, 303 flow. Second operand 11 states and 794 transitions. [2021-12-22 13:31:46,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 104 transitions, 666 flow [2021-12-22 13:31:46,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 104 transitions, 564 flow, removed 29 selfloop flow, removed 11 redundant places. [2021-12-22 13:31:46,411 INFO L242 Difference]: Finished difference. Result has 114 places, 71 transitions, 241 flow [2021-12-22 13:31:46,411 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=241, PETRI_PLACES=114, PETRI_TRANSITIONS=71} [2021-12-22 13:31:46,413 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 32 predicate places. [2021-12-22 13:31:46,414 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 71 transitions, 241 flow [2021-12-22 13:31:46,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,414 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:46,414 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:46,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:31:46,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash -862414461, now seen corresponding path program 1 times [2021-12-22 13:31:46,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740822470] [2021-12-22 13:31:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:46,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:46,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740822470] [2021-12-22 13:31:46,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740822470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:46,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:46,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:31:46,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592957367] [2021-12-22 13:31:46,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:46,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:31:46,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:31:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:31:46,535 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 90 [2021-12-22 13:31:46,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 71 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 74.66666666666667) internal successors, (448), 6 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:46,536 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 90 [2021-12-22 13:31:46,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:46,659 INFO L129 PetriNetUnfolder]: 106/348 cut-off events. [2021-12-22 13:31:46,659 INFO L130 PetriNetUnfolder]: For 455/460 co-relation queries the response was YES. [2021-12-22 13:31:46,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 348 events. 106/348 cut-off events. For 455/460 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1654 event pairs, 11 based on Foata normal form. 8/344 useless extension candidates. Maximal degree in co-relation 715. Up to 96 conditions per place. [2021-12-22 13:31:46,661 INFO L132 encePairwiseOnDemand]: 81/90 looper letters, 12 selfloop transitions, 5 changer transitions 21/96 dead transitions. [2021-12-22 13:31:46,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 367 flow [2021-12-22 13:31:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:31:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:31:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 697 transitions. [2021-12-22 13:31:46,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8604938271604938 [2021-12-22 13:31:46,664 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 697 transitions. [2021-12-22 13:31:46,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 697 transitions. [2021-12-22 13:31:46,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:46,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 697 transitions. [2021-12-22 13:31:46,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.44444444444444) internal successors, (697), 9 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,668 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,668 INFO L186 Difference]: Start difference. First operand has 114 places, 71 transitions, 241 flow. Second operand 9 states and 697 transitions. [2021-12-22 13:31:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 367 flow [2021-12-22 13:31:46,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 322 flow, removed 10 selfloop flow, removed 16 redundant places. [2021-12-22 13:31:46,671 INFO L242 Difference]: Finished difference. Result has 105 places, 73 transitions, 246 flow [2021-12-22 13:31:46,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=246, PETRI_PLACES=105, PETRI_TRANSITIONS=73} [2021-12-22 13:31:46,672 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 23 predicate places. [2021-12-22 13:31:46,672 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 73 transitions, 246 flow [2021-12-22 13:31:46,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.66666666666667) internal successors, (448), 6 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:46,673 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:46,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:31:46,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1339822051, now seen corresponding path program 1 times [2021-12-22 13:31:46,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:46,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758815962] [2021-12-22 13:31:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:46,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:46,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758815962] [2021-12-22 13:31:46,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758815962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:46,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:46,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:31:46,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144603453] [2021-12-22 13:31:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:46,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:31:46,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:31:46,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:31:46,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 90 [2021-12-22 13:31:46,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 73 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:46,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 90 [2021-12-22 13:31:46,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:46,875 INFO L129 PetriNetUnfolder]: 45/202 cut-off events. [2021-12-22 13:31:46,875 INFO L130 PetriNetUnfolder]: For 321/345 co-relation queries the response was YES. [2021-12-22 13:31:46,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 202 events. 45/202 cut-off events. For 321/345 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 699 event pairs, 3 based on Foata normal form. 9/207 useless extension candidates. Maximal degree in co-relation 555. Up to 66 conditions per place. [2021-12-22 13:31:46,876 INFO L132 encePairwiseOnDemand]: 81/90 looper letters, 8 selfloop transitions, 7 changer transitions 25/98 dead transitions. [2021-12-22 13:31:46,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 98 transitions, 503 flow [2021-12-22 13:31:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:31:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:31:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 772 transitions. [2021-12-22 13:31:46,879 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577777777777778 [2021-12-22 13:31:46,879 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 772 transitions. [2021-12-22 13:31:46,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 772 transitions. [2021-12-22 13:31:46,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:46,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 772 transitions. [2021-12-22 13:31:46,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.2) internal successors, (772), 10 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,884 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 90.0) internal successors, (990), 11 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,884 INFO L186 Difference]: Start difference. First operand has 105 places, 73 transitions, 246 flow. Second operand 10 states and 772 transitions. [2021-12-22 13:31:46,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 98 transitions, 503 flow [2021-12-22 13:31:46,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 98 transitions, 476 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-12-22 13:31:46,888 INFO L242 Difference]: Finished difference. Result has 110 places, 73 transitions, 268 flow [2021-12-22 13:31:46,888 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=268, PETRI_PLACES=110, PETRI_TRANSITIONS=73} [2021-12-22 13:31:46,889 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 28 predicate places. [2021-12-22 13:31:46,889 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 73 transitions, 268 flow [2021-12-22 13:31:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:31:46,890 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:46,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:31:46,890 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:31:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:31:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1413953226, now seen corresponding path program 1 times [2021-12-22 13:31:46,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:31:46,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292806400] [2021-12-22 13:31:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:31:46,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:31:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:31:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:31:46,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:31:46,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292806400] [2021-12-22 13:31:46,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292806400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:31:46,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:31:46,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:31:46,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54785956] [2021-12-22 13:31:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:31:46,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:31:46,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:31:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:31:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:31:46,977 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 90 [2021-12-22 13:31:46,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 73 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 74.5) internal successors, (596), 8 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:46,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:31:46,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 90 [2021-12-22 13:31:46,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:31:47,091 INFO L129 PetriNetUnfolder]: 4/82 cut-off events. [2021-12-22 13:31:47,092 INFO L130 PetriNetUnfolder]: For 195/219 co-relation queries the response was YES. [2021-12-22 13:31:47,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 82 events. 4/82 cut-off events. For 195/219 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 6/88 useless extension candidates. Maximal degree in co-relation 199. Up to 13 conditions per place. [2021-12-22 13:31:47,092 INFO L132 encePairwiseOnDemand]: 81/90 looper letters, 0 selfloop transitions, 0 changer transitions 75/75 dead transitions. [2021-12-22 13:31:47,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 75 transitions, 360 flow [2021-12-22 13:31:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:31:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-22 13:31:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 829 transitions. [2021-12-22 13:31:47,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8373737373737373 [2021-12-22 13:31:47,095 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 829 transitions. [2021-12-22 13:31:47,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 829 transitions. [2021-12-22 13:31:47,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:31:47,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 829 transitions. [2021-12-22 13:31:47,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:47,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 90.0) internal successors, (1080), 12 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:47,101 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 90.0) internal successors, (1080), 12 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:47,101 INFO L186 Difference]: Start difference. First operand has 110 places, 73 transitions, 268 flow. Second operand 11 states and 829 transitions. [2021-12-22 13:31:47,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 75 transitions, 360 flow [2021-12-22 13:31:47,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 75 transitions, 283 flow, removed 27 selfloop flow, removed 15 redundant places. [2021-12-22 13:31:47,103 INFO L242 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2021-12-22 13:31:47,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2021-12-22 13:31:47,104 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2021-12-22 13:31:47,111 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2021-12-22 13:31:47,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.5) internal successors, (596), 8 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:31:47,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-22 13:31:47,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-22 13:31:47,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-22 13:31:47,114 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-22 13:31:47,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:31:47,118 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:31:47,120 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:31:47,120 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:31:47,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:31:47 BasicIcfg [2021-12-22 13:31:47,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:31:47,123 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:31:47,123 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:31:47,123 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:31:47,124 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:43" (3/4) ... [2021-12-22 13:31:47,126 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:31:47,131 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-22 13:31:47,131 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-22 13:31:47,131 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-22 13:31:47,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-22 13:31:47,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 13:31:47,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:31:47,136 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:31:47,159 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:31:47,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:31:47,160 INFO L158 Benchmark]: Toolchain (without parser) took 4513.12ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 80.9MB in the beginning and 139.9MB in the end (delta: -59.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:31:47,160 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 77.6MB. Free memory was 35.6MB in the beginning and 35.6MB in the end (delta: 32.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:31:47,161 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.18ms. Allocated memory is still 115.3MB. Free memory was 80.6MB in the beginning and 82.9MB in the end (delta: -2.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 13:31:47,161 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.43ms. Allocated memory is still 115.3MB. Free memory was 82.4MB in the beginning and 80.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:31:47,161 INFO L158 Benchmark]: Boogie Preprocessor took 41.31ms. Allocated memory is still 115.3MB. Free memory was 80.8MB in the beginning and 79.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:31:47,162 INFO L158 Benchmark]: RCFGBuilder took 278.34ms. Allocated memory is still 115.3MB. Free memory was 79.1MB in the beginning and 66.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 13:31:47,162 INFO L158 Benchmark]: TraceAbstraction took 3648.81ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 66.3MB in the beginning and 142.0MB in the end (delta: -75.6MB). Peak memory consumption was 63.5MB. Max. memory is 16.1GB. [2021-12-22 13:31:47,162 INFO L158 Benchmark]: Witness Printer took 36.63ms. Allocated memory is still 169.9MB. Free memory was 142.0MB in the beginning and 139.9MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 13:31:47,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 77.6MB. Free memory was 35.6MB in the beginning and 35.6MB in the end (delta: 32.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.18ms. Allocated memory is still 115.3MB. Free memory was 80.6MB in the beginning and 82.9MB in the end (delta: -2.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.43ms. Allocated memory is still 115.3MB. Free memory was 82.4MB in the beginning and 80.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.31ms. Allocated memory is still 115.3MB. Free memory was 80.8MB in the beginning and 79.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 278.34ms. Allocated memory is still 115.3MB. Free memory was 79.1MB in the beginning and 66.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3648.81ms. Allocated memory was 115.3MB in the beginning and 169.9MB in the end (delta: 54.5MB). Free memory was 66.3MB in the beginning and 142.0MB in the end (delta: -75.6MB). Peak memory consumption was 63.5MB. Max. memory is 16.1GB. * Witness Printer took 36.63ms. Allocated memory is still 169.9MB. Free memory was 142.0MB in the beginning and 139.9MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 112 locations, 4 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: 3.5s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 308 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 308 mSDsluCounter, 468 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 464 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 508 IncrementalHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 115 mSDtfsCounter, 508 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=349occurred in iteration=4, InterpolantAutomatonStates: 94, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 524 ConstructedInterpolants, 0 QuantifiedInterpolants, 2252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 13:31:47,196 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 Result: TRUE