./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe001_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/safe001_tso.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 d13e05ad1104a4a5317ff09857a34619cbd86966f0892caf9775309ccc15230d --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:10:40,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:10:40,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:10:40,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:10:40,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:10:40,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:10:40,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:10:40,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:10:40,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:10:40,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:10:40,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:10:40,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:10:40,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:10:40,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:10:40,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:10:40,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:10:40,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:10:40,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:10:40,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:10:40,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:10:40,141 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:10:40,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:10:40,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:10:40,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:10:40,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:10:40,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:10:40,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:10:40,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:10:40,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:10:40,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:10:40,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:10:40,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:10:40,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:10:40,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:10:40,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:10:40,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:10:40,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:10:40,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:10:40,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:10:40,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:10:40,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:10:40,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:10:40,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:10:40,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:10:40,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:10:40,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:10:40,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:10:40,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:10:40,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:10:40,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:10:40,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:10:40,188 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:10:40,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:10:40,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:10:40,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:10:40,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:10:40,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:10:40,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:10:40,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:10:40,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:10:40,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:10:40,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:10:40,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:10:40,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:10:40,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:10:40,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:10:40,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:10:40,193 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:10:40,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:10:40,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:10:40,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d13e05ad1104a4a5317ff09857a34619cbd86966f0892caf9775309ccc15230d [2022-07-19 21:10:40,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:10:40,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:10:40,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:10:40,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:10:40,391 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:10:40,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe001_tso.i [2022-07-19 21:10:40,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f425da4a/8dd99547af20475fae05ec8faa16df73/FLAG9b87748cd [2022-07-19 21:10:40,843 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:10:40,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe001_tso.i [2022-07-19 21:10:40,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f425da4a/8dd99547af20475fae05ec8faa16df73/FLAG9b87748cd [2022-07-19 21:10:41,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f425da4a/8dd99547af20475fae05ec8faa16df73 [2022-07-19 21:10:41,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:10:41,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:10:41,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:10:41,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:10:41,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:10:41,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de6c226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41, skipping insertion in model container [2022-07-19 21:10:41,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:10:41,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:10:41,460 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/safe001_tso.i[945,958] [2022-07-19 21:10:41,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:10:41,555 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:10:41,563 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/safe001_tso.i[945,958] [2022-07-19 21:10:41,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:10:41,603 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:10:41,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41 WrapperNode [2022-07-19 21:10:41,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:10:41,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:10:41,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:10:41,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:10:41,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,653 INFO L137 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2022-07-19 21:10:41,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:10:41,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:10:41,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:10:41,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:10:41,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:10:41,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:10:41,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:10:41,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:10:41,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (1/1) ... [2022-07-19 21:10:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:10:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:10:41,765 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) [2022-07-19 21:10:41,774 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 [2022-07-19 21:10:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:10:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:10:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:10:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:10:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:10:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-07-19 21:10:41,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-07-19 21:10:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-07-19 21:10:41,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-07-19 21:10:41,811 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-07-19 21:10:41,812 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-07-19 21:10:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:10:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:10:41,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:10:41,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:10:41,813 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:10:41,941 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:10:41,942 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:10:42,090 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:10:42,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:10:42,096 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 21:10:42,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:42 BoogieIcfgContainer [2022-07-19 21:10:42,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:10:42,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:10:42,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:10:42,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:10:42,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:10:41" (1/3) ... [2022-07-19 21:10:42,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e98b8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:42, skipping insertion in model container [2022-07-19 21:10:42,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:10:41" (2/3) ... [2022-07-19 21:10:42,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e98b8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:10:42, skipping insertion in model container [2022-07-19 21:10:42,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:42" (3/3) ... [2022-07-19 21:10:42,104 INFO L111 eAbstractionObserver]: Analyzing ICFG safe001_tso.i [2022-07-19 21:10:42,107 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:10:42,114 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:10:42,114 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:10:42,114 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:10:42,149 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:10:42,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 91 transitions, 197 flow [2022-07-19 21:10:42,220 INFO L129 PetriNetUnfolder]: 2/88 cut-off events. [2022-07-19 21:10:42,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:10:42,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 88 events. 2/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 68. Up to 2 conditions per place. [2022-07-19 21:10:42,224 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 91 transitions, 197 flow [2022-07-19 21:10:42,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 74 transitions, 157 flow [2022-07-19 21:10:42,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:10:42,239 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@293a2ca8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7dcc989f [2022-07-19 21:10:42,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:10:42,256 INFO L129 PetriNetUnfolder]: 1/73 cut-off events. [2022-07-19 21:10:42,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:10:42,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:42,256 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] [2022-07-19 21:10:42,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1258848663, now seen corresponding path program 1 times [2022-07-19 21:10:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:42,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030671216] [2022-07-19 21:10:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:42,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:42,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030671216] [2022-07-19 21:10:42,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030671216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:42,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:42,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709952341] [2022-07-19 21:10:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:42,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:42,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:42,583 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2022-07-19 21:10:42,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 157 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 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) [2022-07-19 21:10:42,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:42,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2022-07-19 21:10:42,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:42,858 INFO L129 PetriNetUnfolder]: 557/1266 cut-off events. [2022-07-19 21:10:42,858 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-19 21:10:42,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 1266 events. 557/1266 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7845 event pairs, 31 based on Foata normal form. 42/1263 useless extension candidates. Maximal degree in co-relation 2165. Up to 261 conditions per place. [2022-07-19 21:10:42,866 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 29 selfloop transitions, 7 changer transitions 56/146 dead transitions. [2022-07-19 21:10:42,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 497 flow [2022-07-19 21:10:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:10:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:10:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 982 transitions. [2022-07-19 21:10:42,882 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8300929839391378 [2022-07-19 21:10:42,883 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 982 transitions. [2022-07-19 21:10:42,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 982 transitions. [2022-07-19 21:10:42,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:42,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 982 transitions. [2022-07-19 21:10:42,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.53846153846153) internal successors, (982), 13 states have internal predecessors, (982), 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) [2022-07-19 21:10:42,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:42,903 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:42,905 INFO L186 Difference]: Start difference. First operand has 83 places, 74 transitions, 157 flow. Second operand 13 states and 982 transitions. [2022-07-19 21:10:42,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 497 flow [2022-07-19 21:10:42,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 146 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:10:42,914 INFO L242 Difference]: Finished difference. Result has 104 places, 78 transitions, 252 flow [2022-07-19 21:10:42,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=78} [2022-07-19 21:10:42,919 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 21 predicate places. [2022-07-19 21:10:42,919 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 78 transitions, 252 flow [2022-07-19 21:10:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 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) [2022-07-19 21:10:42,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:42,921 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] [2022-07-19 21:10:42,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:10:42,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1049210424, now seen corresponding path program 1 times [2022-07-19 21:10:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838230430] [2022-07-19 21:10:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:43,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838230430] [2022-07-19 21:10:43,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838230430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:43,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:43,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282446361] [2022-07-19 21:10:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:43,036 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2022-07-19 21:10:43,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 78 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 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) [2022-07-19 21:10:43,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:43,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2022-07-19 21:10:43,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:43,243 INFO L129 PetriNetUnfolder]: 338/848 cut-off events. [2022-07-19 21:10:43,244 INFO L130 PetriNetUnfolder]: For 2160/2845 co-relation queries the response was YES. [2022-07-19 21:10:43,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2976 conditions, 848 events. 338/848 cut-off events. For 2160/2845 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4736 event pairs, 16 based on Foata normal form. 27/846 useless extension candidates. Maximal degree in co-relation 2928. Up to 239 conditions per place. [2022-07-19 21:10:43,250 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 27 selfloop transitions, 12 changer transitions 58/151 dead transitions. [2022-07-19 21:10:43,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1006 flow [2022-07-19 21:10:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:10:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:10:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 965 transitions. [2022-07-19 21:10:43,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8157227387996618 [2022-07-19 21:10:43,253 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 965 transitions. [2022-07-19 21:10:43,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 965 transitions. [2022-07-19 21:10:43,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:43,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 965 transitions. [2022-07-19 21:10:43,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.23076923076923) internal successors, (965), 13 states have internal predecessors, (965), 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) [2022-07-19 21:10:43,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:43,258 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:43,258 INFO L186 Difference]: Start difference. First operand has 104 places, 78 transitions, 252 flow. Second operand 13 states and 965 transitions. [2022-07-19 21:10:43,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1006 flow [2022-07-19 21:10:43,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 978 flow, removed 12 selfloop flow, removed 4 redundant places. [2022-07-19 21:10:43,269 INFO L242 Difference]: Finished difference. Result has 115 places, 85 transitions, 397 flow [2022-07-19 21:10:43,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=397, PETRI_PLACES=115, PETRI_TRANSITIONS=85} [2022-07-19 21:10:43,270 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 32 predicate places. [2022-07-19 21:10:43,271 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 85 transitions, 397 flow [2022-07-19 21:10:43,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 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) [2022-07-19 21:10:43,271 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:43,272 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] [2022-07-19 21:10:43,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:10:43,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash 714493961, now seen corresponding path program 1 times [2022-07-19 21:10:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:43,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176839079] [2022-07-19 21:10:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:43,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176839079] [2022-07-19 21:10:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176839079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:43,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:43,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242961600] [2022-07-19 21:10:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:43,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:43,444 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2022-07-19 21:10:43,445 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 85 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 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) [2022-07-19 21:10:43,445 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:43,445 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2022-07-19 21:10:43,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:43,681 INFO L129 PetriNetUnfolder]: 227/709 cut-off events. [2022-07-19 21:10:43,682 INFO L130 PetriNetUnfolder]: For 3350/3621 co-relation queries the response was YES. [2022-07-19 21:10:43,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2868 conditions, 709 events. 227/709 cut-off events. For 3350/3621 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3969 event pairs, 3 based on Foata normal form. 21/711 useless extension candidates. Maximal degree in co-relation 2808. Up to 161 conditions per place. [2022-07-19 21:10:43,687 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 31 selfloop transitions, 22 changer transitions 43/150 dead transitions. [2022-07-19 21:10:43,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1250 flow [2022-07-19 21:10:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:10:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:10:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 967 transitions. [2022-07-19 21:10:43,689 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8174133558748944 [2022-07-19 21:10:43,689 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 967 transitions. [2022-07-19 21:10:43,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 967 transitions. [2022-07-19 21:10:43,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:43,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 967 transitions. [2022-07-19 21:10:43,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.38461538461539) internal successors, (967), 13 states have internal predecessors, (967), 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) [2022-07-19 21:10:43,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:43,693 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:43,693 INFO L186 Difference]: Start difference. First operand has 115 places, 85 transitions, 397 flow. Second operand 13 states and 967 transitions. [2022-07-19 21:10:43,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1250 flow [2022-07-19 21:10:43,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 150 transitions, 1172 flow, removed 36 selfloop flow, removed 4 redundant places. [2022-07-19 21:10:43,702 INFO L242 Difference]: Finished difference. Result has 126 places, 97 transitions, 644 flow [2022-07-19 21:10:43,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=644, PETRI_PLACES=126, PETRI_TRANSITIONS=97} [2022-07-19 21:10:43,703 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 43 predicate places. [2022-07-19 21:10:43,703 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 97 transitions, 644 flow [2022-07-19 21:10:43,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 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) [2022-07-19 21:10:43,704 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:43,704 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] [2022-07-19 21:10:43,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:10:43,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1363473321, now seen corresponding path program 1 times [2022-07-19 21:10:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:43,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018200365] [2022-07-19 21:10:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:43,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:43,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018200365] [2022-07-19 21:10:43,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018200365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:43,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:43,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:10:43,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240380606] [2022-07-19 21:10:43,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:43,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:10:43,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:10:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:10:43,789 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2022-07-19 21:10:43,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 97 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 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) [2022-07-19 21:10:43,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:43,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2022-07-19 21:10:43,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:43,947 INFO L129 PetriNetUnfolder]: 157/550 cut-off events. [2022-07-19 21:10:43,948 INFO L130 PetriNetUnfolder]: For 3787/4434 co-relation queries the response was YES. [2022-07-19 21:10:43,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 550 events. 157/550 cut-off events. For 3787/4434 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2896 event pairs, 10 based on Foata normal form. 17/546 useless extension candidates. Maximal degree in co-relation 2503. Up to 137 conditions per place. [2022-07-19 21:10:43,952 INFO L132 encePairwiseOnDemand]: 79/91 looper letters, 31 selfloop transitions, 18 changer transitions 67/170 dead transitions. [2022-07-19 21:10:43,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1821 flow [2022-07-19 21:10:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:10:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:10:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 821 transitions. [2022-07-19 21:10:43,954 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8201798201798202 [2022-07-19 21:10:43,954 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 821 transitions. [2022-07-19 21:10:43,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 821 transitions. [2022-07-19 21:10:43,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:43,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 821 transitions. [2022-07-19 21:10:43,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 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) [2022-07-19 21:10:43,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 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) [2022-07-19 21:10:43,958 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 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) [2022-07-19 21:10:43,958 INFO L186 Difference]: Start difference. First operand has 126 places, 97 transitions, 644 flow. Second operand 11 states and 821 transitions. [2022-07-19 21:10:43,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1821 flow [2022-07-19 21:10:43,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 170 transitions, 1707 flow, removed 57 selfloop flow, removed 12 redundant places. [2022-07-19 21:10:43,967 INFO L242 Difference]: Finished difference. Result has 123 places, 92 transitions, 630 flow [2022-07-19 21:10:43,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=630, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2022-07-19 21:10:43,968 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 40 predicate places. [2022-07-19 21:10:43,968 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 630 flow [2022-07-19 21:10:43,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 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) [2022-07-19 21:10:43,968 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:43,969 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] [2022-07-19 21:10:43,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:10:43,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1878774896, now seen corresponding path program 1 times [2022-07-19 21:10:43,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:43,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572458531] [2022-07-19 21:10:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:43,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:44,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572458531] [2022-07-19 21:10:44,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572458531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:44,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:44,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:44,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526165001] [2022-07-19 21:10:44,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:44,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:44,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 91 [2022-07-19 21:10:44,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 92 transitions, 630 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 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) [2022-07-19 21:10:44,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:44,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 91 [2022-07-19 21:10:44,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:44,239 INFO L129 PetriNetUnfolder]: 57/353 cut-off events. [2022-07-19 21:10:44,239 INFO L130 PetriNetUnfolder]: For 2313/2592 co-relation queries the response was YES. [2022-07-19 21:10:44,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 353 events. 57/353 cut-off events. For 2313/2592 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1845 event pairs, 0 based on Foata normal form. 11/357 useless extension candidates. Maximal degree in co-relation 1403. Up to 65 conditions per place. [2022-07-19 21:10:44,251 INFO L132 encePairwiseOnDemand]: 81/91 looper letters, 33 selfloop transitions, 17 changer transitions 23/127 dead transitions. [2022-07-19 21:10:44,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 127 transitions, 1179 flow [2022-07-19 21:10:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:10:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:10:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 943 transitions. [2022-07-19 21:10:44,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971259509721048 [2022-07-19 21:10:44,253 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 943 transitions. [2022-07-19 21:10:44,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 943 transitions. [2022-07-19 21:10:44,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:44,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 943 transitions. [2022-07-19 21:10:44,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.53846153846153) internal successors, (943), 13 states have internal predecessors, (943), 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) [2022-07-19 21:10:44,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:44,257 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 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) [2022-07-19 21:10:44,257 INFO L186 Difference]: Start difference. First operand has 123 places, 92 transitions, 630 flow. Second operand 13 states and 943 transitions. [2022-07-19 21:10:44,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 127 transitions, 1179 flow [2022-07-19 21:10:44,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 127 transitions, 1088 flow, removed 21 selfloop flow, removed 6 redundant places. [2022-07-19 21:10:44,265 INFO L242 Difference]: Finished difference. Result has 135 places, 93 transitions, 699 flow [2022-07-19 21:10:44,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=699, PETRI_PLACES=135, PETRI_TRANSITIONS=93} [2022-07-19 21:10:44,265 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 52 predicate places. [2022-07-19 21:10:44,265 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 93 transitions, 699 flow [2022-07-19 21:10:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 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) [2022-07-19 21:10:44,266 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:44,266 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] [2022-07-19 21:10:44,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:10:44,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1439644304, now seen corresponding path program 1 times [2022-07-19 21:10:44,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229448989] [2022-07-19 21:10:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:44,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:44,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:44,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229448989] [2022-07-19 21:10:44,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229448989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:44,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:44,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78016267] [2022-07-19 21:10:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:44,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:44,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-07-19 21:10:44,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 93 transitions, 699 flow. Second operand has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2022-07-19 21:10:44,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:44,382 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-07-19 21:10:44,382 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:44,465 INFO L129 PetriNetUnfolder]: 26/236 cut-off events. [2022-07-19 21:10:44,465 INFO L130 PetriNetUnfolder]: For 1989/2209 co-relation queries the response was YES. [2022-07-19 21:10:44,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 236 events. 26/236 cut-off events. For 1989/2209 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1063 event pairs, 3 based on Foata normal form. 23/252 useless extension candidates. Maximal degree in co-relation 993. Up to 41 conditions per place. [2022-07-19 21:10:44,467 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 16 selfloop transitions, 5 changer transitions 28/110 dead transitions. [2022-07-19 21:10:44,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 110 transitions, 1072 flow [2022-07-19 21:10:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:10:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:10:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 533 transitions. [2022-07-19 21:10:44,469 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-07-19 21:10:44,469 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 533 transitions. [2022-07-19 21:10:44,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 533 transitions. [2022-07-19 21:10:44,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:44,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 533 transitions. [2022-07-19 21:10:44,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.14285714285714) internal successors, (533), 7 states have internal predecessors, (533), 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) [2022-07-19 21:10:44,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 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) [2022-07-19 21:10:44,471 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 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) [2022-07-19 21:10:44,471 INFO L186 Difference]: Start difference. First operand has 135 places, 93 transitions, 699 flow. Second operand 7 states and 533 transitions. [2022-07-19 21:10:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 110 transitions, 1072 flow [2022-07-19 21:10:44,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 110 transitions, 988 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-07-19 21:10:44,482 INFO L242 Difference]: Finished difference. Result has 129 places, 81 transitions, 434 flow [2022-07-19 21:10:44,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=129, PETRI_TRANSITIONS=81} [2022-07-19 21:10:44,484 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 46 predicate places. [2022-07-19 21:10:44,484 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 81 transitions, 434 flow [2022-07-19 21:10:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2022-07-19 21:10:44,485 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:44,485 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] [2022-07-19 21:10:44,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:10:44,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1556929320, now seen corresponding path program 1 times [2022-07-19 21:10:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453741714] [2022-07-19 21:10:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:44,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453741714] [2022-07-19 21:10:44,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453741714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:44,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:44,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18230049] [2022-07-19 21:10:44,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:44,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 91 [2022-07-19 21:10:44,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 81 transitions, 434 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2022-07-19 21:10:44,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:44,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 91 [2022-07-19 21:10:44,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:44,659 INFO L129 PetriNetUnfolder]: 5/125 cut-off events. [2022-07-19 21:10:44,659 INFO L130 PetriNetUnfolder]: For 538/623 co-relation queries the response was YES. [2022-07-19 21:10:44,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 125 events. 5/125 cut-off events. For 538/623 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 315 event pairs, 0 based on Foata normal form. 9/132 useless extension candidates. Maximal degree in co-relation 392. Up to 14 conditions per place. [2022-07-19 21:10:44,660 INFO L132 encePairwiseOnDemand]: 84/91 looper letters, 14 selfloop transitions, 2 changer transitions 15/88 dead transitions. [2022-07-19 21:10:44,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 88 transitions, 548 flow [2022-07-19 21:10:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:10:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:10:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 601 transitions. [2022-07-19 21:10:44,662 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8255494505494505 [2022-07-19 21:10:44,662 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 601 transitions. [2022-07-19 21:10:44,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 601 transitions. [2022-07-19 21:10:44,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:44,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 601 transitions. [2022-07-19 21:10:44,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 75.125) internal successors, (601), 8 states have internal predecessors, (601), 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) [2022-07-19 21:10:44,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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) [2022-07-19 21:10:44,665 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 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) [2022-07-19 21:10:44,665 INFO L186 Difference]: Start difference. First operand has 129 places, 81 transitions, 434 flow. Second operand 8 states and 601 transitions. [2022-07-19 21:10:44,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 88 transitions, 548 flow [2022-07-19 21:10:44,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 88 transitions, 427 flow, removed 41 selfloop flow, removed 21 redundant places. [2022-07-19 21:10:44,669 INFO L242 Difference]: Finished difference. Result has 116 places, 72 transitions, 247 flow [2022-07-19 21:10:44,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=116, PETRI_TRANSITIONS=72} [2022-07-19 21:10:44,670 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 33 predicate places. [2022-07-19 21:10:44,671 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 72 transitions, 247 flow [2022-07-19 21:10:44,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 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) [2022-07-19 21:10:44,671 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:44,671 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] [2022-07-19 21:10:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:10:44,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1425138734, now seen corresponding path program 2 times [2022-07-19 21:10:44,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:44,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115873373] [2022-07-19 21:10:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:44,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115873373] [2022-07-19 21:10:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115873373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:44,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:44,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:10:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141637766] [2022-07-19 21:10:44,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:44,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:10:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:10:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:10:44,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-07-19 21:10:44,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 72 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 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) [2022-07-19 21:10:44,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:44,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-07-19 21:10:44,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:44,849 INFO L129 PetriNetUnfolder]: 94/317 cut-off events. [2022-07-19 21:10:44,849 INFO L130 PetriNetUnfolder]: For 133/135 co-relation queries the response was YES. [2022-07-19 21:10:44,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 317 events. 94/317 cut-off events. For 133/135 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1490 event pairs, 14 based on Foata normal form. 8/319 useless extension candidates. Maximal degree in co-relation 590. Up to 86 conditions per place. [2022-07-19 21:10:44,851 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 13 selfloop transitions, 5 changer transitions 21/98 dead transitions. [2022-07-19 21:10:44,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 98 transitions, 379 flow [2022-07-19 21:10:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:10:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:10:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 707 transitions. [2022-07-19 21:10:44,855 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8632478632478633 [2022-07-19 21:10:44,855 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 707 transitions. [2022-07-19 21:10:44,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 707 transitions. [2022-07-19 21:10:44,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:44,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 707 transitions. [2022-07-19 21:10:44,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.55555555555556) internal successors, (707), 9 states have internal predecessors, (707), 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) [2022-07-19 21:10:44,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 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) [2022-07-19 21:10:44,859 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 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) [2022-07-19 21:10:44,859 INFO L186 Difference]: Start difference. First operand has 116 places, 72 transitions, 247 flow. Second operand 9 states and 707 transitions. [2022-07-19 21:10:44,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 98 transitions, 379 flow [2022-07-19 21:10:44,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 98 transitions, 308 flow, removed 11 selfloop flow, removed 18 redundant places. [2022-07-19 21:10:44,861 INFO L242 Difference]: Finished difference. Result has 106 places, 74 transitions, 226 flow [2022-07-19 21:10:44,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=74} [2022-07-19 21:10:44,863 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 23 predicate places. [2022-07-19 21:10:44,864 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 74 transitions, 226 flow [2022-07-19 21:10:44,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.66666666666667) internal successors, (454), 6 states have internal predecessors, (454), 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) [2022-07-19 21:10:44,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:44,864 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] [2022-07-19 21:10:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:10:44,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1658672851, now seen corresponding path program 1 times [2022-07-19 21:10:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253082247] [2022-07-19 21:10:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:44,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253082247] [2022-07-19 21:10:44,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253082247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:44,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:44,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:10:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848391420] [2022-07-19 21:10:44,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:10:44,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:10:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:10:44,954 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-07-19 21:10:44,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 74 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 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) [2022-07-19 21:10:44,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:44,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-07-19 21:10:44,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:45,048 INFO L129 PetriNetUnfolder]: 43/199 cut-off events. [2022-07-19 21:10:45,048 INFO L130 PetriNetUnfolder]: For 259/276 co-relation queries the response was YES. [2022-07-19 21:10:45,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 199 events. 43/199 cut-off events. For 259/276 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 686 event pairs, 0 based on Foata normal form. 7/205 useless extension candidates. Maximal degree in co-relation 548. Up to 65 conditions per place. [2022-07-19 21:10:45,049 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 9 selfloop transitions, 7 changer transitions 25/100 dead transitions. [2022-07-19 21:10:45,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 100 transitions, 489 flow [2022-07-19 21:10:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:10:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:10:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 783 transitions. [2022-07-19 21:10:45,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8604395604395605 [2022-07-19 21:10:45,051 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 783 transitions. [2022-07-19 21:10:45,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 783 transitions. [2022-07-19 21:10:45,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:45,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 783 transitions. [2022-07-19 21:10:45,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 78.3) internal successors, (783), 10 states have internal predecessors, (783), 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) [2022-07-19 21:10:45,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 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) [2022-07-19 21:10:45,055 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 91.0) internal successors, (1001), 11 states have internal predecessors, (1001), 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) [2022-07-19 21:10:45,055 INFO L186 Difference]: Start difference. First operand has 106 places, 74 transitions, 226 flow. Second operand 10 states and 783 transitions. [2022-07-19 21:10:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 100 transitions, 489 flow [2022-07-19 21:10:45,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 100 transitions, 463 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-19 21:10:45,057 INFO L242 Difference]: Finished difference. Result has 111 places, 74 transitions, 249 flow [2022-07-19 21:10:45,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=249, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2022-07-19 21:10:45,058 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 28 predicate places. [2022-07-19 21:10:45,058 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 249 flow [2022-07-19 21:10:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 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) [2022-07-19 21:10:45,058 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:10:45,059 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] [2022-07-19 21:10:45,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:10:45,059 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:10:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:10:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1174102528, now seen corresponding path program 1 times [2022-07-19 21:10:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:10:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106640537] [2022-07-19 21:10:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:10:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:10:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:10:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:10:45,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:10:45,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106640537] [2022-07-19 21:10:45,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106640537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:10:45,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:10:45,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:10:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643186980] [2022-07-19 21:10:45,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:10:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:10:45,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:10:45,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:10:45,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:10:45,120 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 91 [2022-07-19 21:10:45,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 249 flow. Second operand has 8 states, 8 states have (on average 75.5) internal successors, (604), 8 states have internal predecessors, (604), 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) [2022-07-19 21:10:45,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:10:45,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 91 [2022-07-19 21:10:45,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:10:45,238 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-19 21:10:45,238 INFO L130 PetriNetUnfolder]: For 185/193 co-relation queries the response was YES. [2022-07-19 21:10:45,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 92 events. 5/92 cut-off events. For 185/193 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 132 event pairs, 0 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 218. Up to 14 conditions per place. [2022-07-19 21:10:45,239 INFO L132 encePairwiseOnDemand]: 82/91 looper letters, 0 selfloop transitions, 0 changer transitions 77/77 dead transitions. [2022-07-19 21:10:45,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 77 transitions, 355 flow [2022-07-19 21:10:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:10:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:10:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 841 transitions. [2022-07-19 21:10:45,241 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8401598401598401 [2022-07-19 21:10:45,241 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 841 transitions. [2022-07-19 21:10:45,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 841 transitions. [2022-07-19 21:10:45,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:10:45,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 841 transitions. [2022-07-19 21:10:45,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.45454545454545) internal successors, (841), 11 states have internal predecessors, (841), 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) [2022-07-19 21:10:45,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 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) [2022-07-19 21:10:45,244 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 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) [2022-07-19 21:10:45,244 INFO L186 Difference]: Start difference. First operand has 111 places, 74 transitions, 249 flow. Second operand 11 states and 841 transitions. [2022-07-19 21:10:45,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 77 transitions, 355 flow [2022-07-19 21:10:45,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 77 transitions, 290 flow, removed 23 selfloop flow, removed 11 redundant places. [2022-07-19 21:10:45,245 INFO L242 Difference]: Finished difference. Result has 99 places, 0 transitions, 0 flow [2022-07-19 21:10:45,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=99, PETRI_TRANSITIONS=0} [2022-07-19 21:10:45,246 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 16 predicate places. [2022-07-19 21:10:45,246 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 0 transitions, 0 flow [2022-07-19 21:10:45,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.5) internal successors, (604), 8 states have internal predecessors, (604), 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) [2022-07-19 21:10:45,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-07-19 21:10:45,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-07-19 21:10:45,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-19 21:10:45,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-07-19 21:10:45,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:10:45,250 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:10:45,252 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-19 21:10:45,267 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:10:45,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:10:45 BasicIcfg [2022-07-19 21:10:45,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:10:45,272 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:10:45,272 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:10:45,272 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:10:45,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:10:42" (3/4) ... [2022-07-19 21:10:45,274 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 21:10:45,278 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-07-19 21:10:45,278 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-07-19 21:10:45,279 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2022-07-19 21:10:45,281 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-07-19 21:10:45,295 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-19 21:10:45,295 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 21:10:45,295 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 21:10:45,316 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:10:45,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:10:45,317 INFO L158 Benchmark]: Toolchain (without parser) took 4067.34ms. Allocated memory was 79.7MB in the beginning and 151.0MB in the end (delta: 71.3MB). Free memory was 42.0MB in the beginning and 112.0MB in the end (delta: -70.0MB). Peak memory consumption was 665.8kB. Max. memory is 16.1GB. [2022-07-19 21:10:45,317 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 79.7MB. Free memory was 59.9MB in the beginning and 59.9MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:10:45,318 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.64ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 41.8MB in the beginning and 61.8MB in the end (delta: -20.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 21:10:45,318 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.15ms. Allocated memory is still 96.5MB. Free memory was 61.8MB in the beginning and 59.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:10:45,318 INFO L158 Benchmark]: Boogie Preprocessor took 39.91ms. Allocated memory is still 96.5MB. Free memory was 59.8MB in the beginning and 58.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:10:45,318 INFO L158 Benchmark]: RCFGBuilder took 402.13ms. Allocated memory is still 96.5MB. Free memory was 58.3MB in the beginning and 46.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 21:10:45,319 INFO L158 Benchmark]: TraceAbstraction took 3172.44ms. Allocated memory was 96.5MB in the beginning and 151.0MB in the end (delta: 54.5MB). Free memory was 45.7MB in the beginning and 114.1MB in the end (delta: -68.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:10:45,319 INFO L158 Benchmark]: Witness Printer took 45.31ms. Allocated memory is still 151.0MB. Free memory was 114.1MB in the beginning and 112.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:10:45,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 79.7MB. Free memory was 59.9MB in the beginning and 59.9MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.64ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 41.8MB in the beginning and 61.8MB in the end (delta: -20.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.15ms. Allocated memory is still 96.5MB. Free memory was 61.8MB in the beginning and 59.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.91ms. Allocated memory is still 96.5MB. Free memory was 59.8MB in the beginning and 58.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 402.13ms. Allocated memory is still 96.5MB. Free memory was 58.3MB in the beginning and 46.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3172.44ms. Allocated memory was 96.5MB in the beginning and 151.0MB in the end (delta: 54.5MB). Free memory was 45.7MB in the beginning and 114.1MB in the end (delta: -68.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 45.31ms. Allocated memory is still 151.0MB. Free memory was 114.1MB in the beginning and 112.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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, 114 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: 3.1s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 399 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 399 mSDsluCounter, 708 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 673 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 605 IncrementalHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 173 mSDtfsCounter, 605 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=699occurred in iteration=5, InterpolantAutomatonStates: 108, 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, 0.8s InterpolantComputationTime, 601 NumberOfCodeBlocks, 601 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 2447 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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! [2022-07-19 21:10:45,354 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