./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-divine/ring_2w1r-2.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 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:30:09,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:30:09,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:30:09,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:30:09,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:30:09,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:30:09,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:30:09,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:30:09,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:30:09,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:30:09,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:30:09,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:30:09,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:30:09,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:30:09,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:30:09,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:30:09,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:30:09,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:30:09,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:30:09,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:30:09,192 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:30:09,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:30:09,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:30:09,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:30:09,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:30:09,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:30:09,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:30:09,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:30:09,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:30:09,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:30:09,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:30:09,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:30:09,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:30:09,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:30:09,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:30:09,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:30:09,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:30:09,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:30:09,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:30:09,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:30:09,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:30:09,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:30:09,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:30:09,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:30:09,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:30:09,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:30:09,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:30:09,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:30:09,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:30:09,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:30:09,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:30:09,249 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:30:09,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:30:09,250 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:30:09,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:30:09,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:30:09,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:30:09,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:30:09,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:30:09,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:30:09,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:30:09,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:30:09,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:30:09,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:30:09,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:30:09,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:30:09,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:30:09,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:30:09,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:30:09,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:30:09,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:30:09,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:30:09,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:30:09,254 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:30:09,254 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:30:09,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:30:09,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2022-07-22 21:30:09,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:30:09,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:30:09,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:30:09,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:30:09,539 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:30:09,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-22 21:30:09,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63520e1f/445d9129e08b4d16b98a321ac0e1b62b/FLAG095cb907c [2022-07-22 21:30:10,066 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:30:10,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2022-07-22 21:30:10,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63520e1f/445d9129e08b4d16b98a321ac0e1b62b/FLAG095cb907c [2022-07-22 21:30:10,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63520e1f/445d9129e08b4d16b98a321ac0e1b62b [2022-07-22 21:30:10,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:30:10,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:30:10,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:30:10,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:30:10,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:30:10,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:30:10" (1/1) ... [2022-07-22 21:30:10,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f9dfece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:10, skipping insertion in model container [2022-07-22 21:30:10,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:30:10" (1/1) ... [2022-07-22 21:30:10,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:30:10,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:30:10,748 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:30:10,936 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-divine/ring_2w1r-2.i[39095,39108] [2022-07-22 21:30:10,939 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-divine/ring_2w1r-2.i[39180,39193] [2022-07-22 21:30:10,940 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-divine/ring_2w1r-2.i[39232,39245] [2022-07-22 21:30:10,999 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-divine/ring_2w1r-2.i[49285,49298] [2022-07-22 21:30:11,000 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-divine/ring_2w1r-2.i[49334,49347] [2022-07-22 21:30:11,002 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-divine/ring_2w1r-2.i[49462,49475] [2022-07-22 21:30:11,002 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-divine/ring_2w1r-2.i[49520,49533] [2022-07-22 21:30:11,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:30:11,016 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:30:11,032 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:30:11,045 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-divine/ring_2w1r-2.i[39095,39108] [2022-07-22 21:30:11,060 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-divine/ring_2w1r-2.i[39180,39193] [2022-07-22 21:30:11,061 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-divine/ring_2w1r-2.i[39232,39245] [2022-07-22 21:30:11,068 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-divine/ring_2w1r-2.i[49285,49298] [2022-07-22 21:30:11,068 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-divine/ring_2w1r-2.i[49334,49347] [2022-07-22 21:30:11,069 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-divine/ring_2w1r-2.i[49462,49475] [2022-07-22 21:30:11,070 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-divine/ring_2w1r-2.i[49520,49533] [2022-07-22 21:30:11,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:30:11,114 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:30:11,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11 WrapperNode [2022-07-22 21:30:11,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:30:11,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:30:11,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:30:11,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:30:11,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,154 INFO L137 Inliner]: procedures = 309, calls = 63, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 190 [2022-07-22 21:30:11,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:30:11,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:30:11,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:30:11,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:30:11,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:30:11,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:30:11,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:30:11,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:30:11,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (1/1) ... [2022-07-22 21:30:11,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:30:11,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:11,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:30:11,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:30:11,322 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-22 21:30:11,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-22 21:30:11,322 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-22 21:30:11,322 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-22 21:30:11,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:30:11,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:30:11,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:30:11,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:30:11,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:30:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:30:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:30:11,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:30:11,325 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:30:11,427 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:30:11,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:30:11,675 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:30:11,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:30:11,683 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:30:11,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:11 BoogieIcfgContainer [2022-07-22 21:30:11,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:30:11,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:30:11,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:30:11,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:30:11,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:30:10" (1/3) ... [2022-07-22 21:30:11,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738cf710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:30:11, skipping insertion in model container [2022-07-22 21:30:11,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:11" (2/3) ... [2022-07-22 21:30:11,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738cf710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:30:11, skipping insertion in model container [2022-07-22 21:30:11,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:11" (3/3) ... [2022-07-22 21:30:11,691 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2022-07-22 21:30:11,695 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:30:11,701 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:30:11,702 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-22 21:30:11,702 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:30:11,762 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:30:11,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 210 places, 220 transitions, 456 flow [2022-07-22 21:30:11,849 INFO L129 PetriNetUnfolder]: 17/218 cut-off events. [2022-07-22 21:30:11,850 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:30:11,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 218 events. 17/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 439 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-07-22 21:30:11,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 220 transitions, 456 flow [2022-07-22 21:30:11,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 207 transitions, 423 flow [2022-07-22 21:30:11,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:30:11,874 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@27028c02, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2cda927b [2022-07-22 21:30:11,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-22 21:30:11,912 INFO L129 PetriNetUnfolder]: 12/178 cut-off events. [2022-07-22 21:30:11,913 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:30:11,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:11,915 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:11,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-22 21:30:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1408739966, now seen corresponding path program 1 times [2022-07-22 21:30:11,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822362633] [2022-07-22 21:30:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:11,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:12,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:12,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822362633] [2022-07-22 21:30:12,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822362633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:12,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:12,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-22 21:30:12,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425723794] [2022-07-22 21:30:12,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:12,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:30:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:30:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:30:12,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 220 [2022-07-22 21:30:12,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 207 transitions, 423 flow. Second operand has 18 states, 18 states have (on average 130.83333333333334) internal successors, (2355), 18 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:12,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:12,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 220 [2022-07-22 21:30:12,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:16,062 INFO L129 PetriNetUnfolder]: 6879/19842 cut-off events. [2022-07-22 21:30:16,063 INFO L130 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-07-22 21:30:16,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29408 conditions, 19842 events. 6879/19842 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 210483 event pairs, 3417 based on Foata normal form. 1588/19703 useless extension candidates. Maximal degree in co-relation 29206. Up to 7350 conditions per place. [2022-07-22 21:30:16,183 INFO L132 encePairwiseOnDemand]: 188/220 looper letters, 176 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2022-07-22 21:30:16,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 1136 flow [2022-07-22 21:30:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:30:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:30:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3581 transitions. [2022-07-22 21:30:16,202 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6260489510489511 [2022-07-22 21:30:16,203 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3581 transitions. [2022-07-22 21:30:16,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3581 transitions. [2022-07-22 21:30:16,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:16,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3581 transitions. [2022-07-22 21:30:16,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 137.73076923076923) internal successors, (3581), 26 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:16,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 220.0) internal successors, (5940), 27 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:16,235 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 220.0) internal successors, (5940), 27 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:16,237 INFO L186 Difference]: Start difference. First operand has 197 places, 207 transitions, 423 flow. Second operand 26 states and 3581 transitions. [2022-07-22 21:30:16,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 1136 flow [2022-07-22 21:30:16,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 337 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:30:16,248 INFO L242 Difference]: Finished difference. Result has 229 places, 228 transitions, 610 flow [2022-07-22 21:30:16,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=610, PETRI_PLACES=229, PETRI_TRANSITIONS=228} [2022-07-22 21:30:16,253 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 32 predicate places. [2022-07-22 21:30:16,253 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 228 transitions, 610 flow [2022-07-22 21:30:16,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 130.83333333333334) internal successors, (2355), 18 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:16,255 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:16,255 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:16,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:30:16,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-22 21:30:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1531373137, now seen corresponding path program 1 times [2022-07-22 21:30:16,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:16,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439846212] [2022-07-22 21:30:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:16,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:16,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439846212] [2022-07-22 21:30:16,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439846212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:16,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:16,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:30:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733851073] [2022-07-22 21:30:16,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:30:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:30:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:30:16,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-22 21:30:16,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 228 transitions, 610 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:16,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:16,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-22 21:30:16,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:21,860 INFO L129 PetriNetUnfolder]: 11418/30484 cut-off events. [2022-07-22 21:30:21,861 INFO L130 PetriNetUnfolder]: For 3294/3300 co-relation queries the response was YES. [2022-07-22 21:30:21,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 30484 events. 11418/30484 cut-off events. For 3294/3300 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 347691 event pairs, 2230 based on Foata normal form. 92/28429 useless extension candidates. Maximal degree in co-relation 48956. Up to 7669 conditions per place. [2022-07-22 21:30:22,051 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 333 selfloop transitions, 100 changer transitions 31/584 dead transitions. [2022-07-22 21:30:22,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 584 transitions, 2392 flow [2022-07-22 21:30:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:30:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:30:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4636 transitions. [2022-07-22 21:30:22,060 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6385674931129477 [2022-07-22 21:30:22,060 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4636 transitions. [2022-07-22 21:30:22,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4636 transitions. [2022-07-22 21:30:22,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:22,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4636 transitions. [2022-07-22 21:30:22,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 140.4848484848485) internal successors, (4636), 33 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:22,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:22,081 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:22,081 INFO L186 Difference]: Start difference. First operand has 229 places, 228 transitions, 610 flow. Second operand 33 states and 4636 transitions. [2022-07-22 21:30:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 584 transitions, 2392 flow [2022-07-22 21:30:22,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 584 transitions, 2381 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:30:22,117 INFO L242 Difference]: Finished difference. Result has 270 places, 299 transitions, 1209 flow [2022-07-22 21:30:22,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1209, PETRI_PLACES=270, PETRI_TRANSITIONS=299} [2022-07-22 21:30:22,118 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 73 predicate places. [2022-07-22 21:30:22,118 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 299 transitions, 1209 flow [2022-07-22 21:30:22,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:22,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:22,120 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:22,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:30:22,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-22 21:30:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:22,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2001167401, now seen corresponding path program 2 times [2022-07-22 21:30:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:22,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39392807] [2022-07-22 21:30:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:22,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:22,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:22,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39392807] [2022-07-22 21:30:22,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39392807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:22,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:22,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:30:22,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989649536] [2022-07-22 21:30:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:22,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:30:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:30:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:30:22,565 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-22 21:30:22,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 299 transitions, 1209 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:22,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:22,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-22 21:30:22,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:29,022 INFO L129 PetriNetUnfolder]: 13299/35931 cut-off events. [2022-07-22 21:30:29,023 INFO L130 PetriNetUnfolder]: For 18134/18206 co-relation queries the response was YES. [2022-07-22 21:30:29,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67496 conditions, 35931 events. 13299/35931 cut-off events. For 18134/18206 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 425381 event pairs, 2482 based on Foata normal form. 146/33543 useless extension candidates. Maximal degree in co-relation 66243. Up to 7717 conditions per place. [2022-07-22 21:30:29,593 INFO L132 encePairwiseOnDemand]: 194/220 looper letters, 345 selfloop transitions, 135 changer transitions 15/615 dead transitions. [2022-07-22 21:30:29,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 615 transitions, 3115 flow [2022-07-22 21:30:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:30:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:30:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4620 transitions. [2022-07-22 21:30:29,601 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-07-22 21:30:29,602 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4620 transitions. [2022-07-22 21:30:29,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4620 transitions. [2022-07-22 21:30:29,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:29,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4620 transitions. [2022-07-22 21:30:29,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 140.0) internal successors, (4620), 33 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:29,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:29,623 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 220.0) internal successors, (7480), 34 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:29,623 INFO L186 Difference]: Start difference. First operand has 270 places, 299 transitions, 1209 flow. Second operand 33 states and 4620 transitions. [2022-07-22 21:30:29,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 615 transitions, 3115 flow [2022-07-22 21:30:29,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 615 transitions, 3063 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-07-22 21:30:29,744 INFO L242 Difference]: Finished difference. Result has 303 places, 337 transitions, 1872 flow [2022-07-22 21:30:29,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1872, PETRI_PLACES=303, PETRI_TRANSITIONS=337} [2022-07-22 21:30:29,745 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 106 predicate places. [2022-07-22 21:30:29,745 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 337 transitions, 1872 flow [2022-07-22 21:30:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:29,746 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:29,746 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:29,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:30:29,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-22 21:30:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1592781447, now seen corresponding path program 3 times [2022-07-22 21:30:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939968713] [2022-07-22 21:30:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939968713] [2022-07-22 21:30:30,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939968713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:30,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:30,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:30:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242186952] [2022-07-22 21:30:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:30:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:30:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:30:30,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 220 [2022-07-22 21:30:30,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 337 transitions, 1872 flow. Second operand has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:30,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:30,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 220 [2022-07-22 21:30:30,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:36,332 INFO L129 PetriNetUnfolder]: 14235/39227 cut-off events. [2022-07-22 21:30:36,333 INFO L130 PetriNetUnfolder]: For 40129/40251 co-relation queries the response was YES. [2022-07-22 21:30:36,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79578 conditions, 39227 events. 14235/39227 cut-off events. For 40129/40251 co-relation queries the response was YES. Maximal size of possible extension queue 1174. Compared 473190 event pairs, 2046 based on Foata normal form. 182/36764 useless extension candidates. Maximal degree in co-relation 78337. Up to 7455 conditions per place. [2022-07-22 21:30:36,632 INFO L132 encePairwiseOnDemand]: 196/220 looper letters, 286 selfloop transitions, 157 changer transitions 8/571 dead transitions. [2022-07-22 21:30:36,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 571 transitions, 3522 flow [2022-07-22 21:30:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:30:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:30:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3766 transitions. [2022-07-22 21:30:36,639 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.634006734006734 [2022-07-22 21:30:36,639 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3766 transitions. [2022-07-22 21:30:36,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3766 transitions. [2022-07-22 21:30:36,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:36,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3766 transitions. [2022-07-22 21:30:36,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 139.4814814814815) internal successors, (3766), 27 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:36,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 220.0) internal successors, (6160), 28 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:36,668 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 220.0) internal successors, (6160), 28 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:36,668 INFO L186 Difference]: Start difference. First operand has 303 places, 337 transitions, 1872 flow. Second operand 27 states and 3766 transitions. [2022-07-22 21:30:36,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 571 transitions, 3522 flow [2022-07-22 21:30:36,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 571 transitions, 3414 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-07-22 21:30:36,929 INFO L242 Difference]: Finished difference. Result has 321 places, 366 transitions, 2527 flow [2022-07-22 21:30:36,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2527, PETRI_PLACES=321, PETRI_TRANSITIONS=366} [2022-07-22 21:30:36,931 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 124 predicate places. [2022-07-22 21:30:36,931 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 2527 flow [2022-07-22 21:30:36,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 129.6) internal successors, (2592), 20 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:36,932 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:36,932 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:36,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:30:36,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-22 21:30:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1799698503, now seen corresponding path program 1 times [2022-07-22 21:30:36,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:36,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303881893] [2022-07-22 21:30:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:37,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303881893] [2022-07-22 21:30:37,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303881893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:37,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:37,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-22 21:30:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931105329] [2022-07-22 21:30:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:37,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 21:30:37,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 21:30:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-07-22 21:30:37,756 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-22 21:30:37,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 366 transitions, 2527 flow. Second operand has 29 states, 29 states have (on average 119.20689655172414) internal successors, (3457), 29 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:37,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:37,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-22 21:30:37,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:57,124 INFO L129 PetriNetUnfolder]: 46421/107194 cut-off events. [2022-07-22 21:30:57,124 INFO L130 PetriNetUnfolder]: For 236203/236293 co-relation queries the response was YES. [2022-07-22 21:30:58,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263272 conditions, 107194 events. 46421/107194 cut-off events. For 236203/236293 co-relation queries the response was YES. Maximal size of possible extension queue 3129. Compared 1366961 event pairs, 2460 based on Foata normal form. 200/102041 useless extension candidates. Maximal degree in co-relation 260609. Up to 32726 conditions per place. [2022-07-22 21:30:58,682 INFO L132 encePairwiseOnDemand]: 184/220 looper letters, 976 selfloop transitions, 464 changer transitions 0/1550 dead transitions. [2022-07-22 21:30:58,682 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1550 transitions, 14221 flow [2022-07-22 21:30:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 21:30:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-22 21:30:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6769 transitions. [2022-07-22 21:30:58,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6032976827094474 [2022-07-22 21:30:58,688 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6769 transitions. [2022-07-22 21:30:58,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6769 transitions. [2022-07-22 21:30:58,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:58,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6769 transitions. [2022-07-22 21:30:58,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 132.72549019607843) internal successors, (6769), 51 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:58,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 220.0) internal successors, (11440), 52 states have internal predecessors, (11440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:58,707 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 220.0) internal successors, (11440), 52 states have internal predecessors, (11440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:58,708 INFO L186 Difference]: Start difference. First operand has 321 places, 366 transitions, 2527 flow. Second operand 51 states and 6769 transitions. [2022-07-22 21:30:58,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1550 transitions, 14221 flow [2022-07-22 21:31:01,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1550 transitions, 13543 flow, removed 282 selfloop flow, removed 12 redundant places. [2022-07-22 21:31:01,136 INFO L242 Difference]: Finished difference. Result has 392 places, 752 transitions, 7832 flow [2022-07-22 21:31:01,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7832, PETRI_PLACES=392, PETRI_TRANSITIONS=752} [2022-07-22 21:31:01,137 INFO L279 CegarLoopForPetriNet]: 197 programPoint places, 195 predicate places. [2022-07-22 21:31:01,137 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 752 transitions, 7832 flow [2022-07-22 21:31:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 119.20689655172414) internal successors, (3457), 29 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:01,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:31:01,138 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:31:01,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:31:01,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-22 21:31:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:31:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2080907019, now seen corresponding path program 2 times [2022-07-22 21:31:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:31:01,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007437889] [2022-07-22 21:31:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:31:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:31:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:31:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:31:01,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:31:01,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007437889] [2022-07-22 21:31:01,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007437889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:31:01,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:31:01,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-22 21:31:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487802361] [2022-07-22 21:31:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:31:01,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 21:31:01,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:31:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 21:31:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-07-22 21:31:01,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 220 [2022-07-22 21:31:01,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 752 transitions, 7832 flow. Second operand has 29 states, 29 states have (on average 119.20689655172414) internal successors, (3457), 29 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:31:01,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:31:01,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 220 [2022-07-22 21:31:01,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand