./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/goblint-regression/28-race_reach_61-invariant_racing.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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:17:13,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:17:13,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:17:13,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:17:13,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:17:13,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:17:13,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:17:13,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:17:13,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:17:13,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:17:13,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:17:13,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:17:13,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:17:13,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:17:13,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:17:13,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:17:13,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:17:13,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:17:13,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:17:13,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:17:13,490 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:17:13,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:17:13,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:17:13,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:17:13,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:17:13,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:17:13,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:17:13,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:17:13,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:17:13,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:17:13,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:17:13,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:17:13,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:17:13,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:17:13,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:17:13,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:17:13,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:17:13,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:17:13,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:17:13,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:17:13,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:17:13,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:17:13,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:17:13,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:17:13,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:17:13,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:17:13,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:17:13,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:17:13,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:17:13,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:17:13,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:17:13,535 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:17:13,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:17:13,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:17:13,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:17:13,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:17:13,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:17:13,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:17:13,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:17:13,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:17:13,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:17:13,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:17:13,538 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:17:13,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:17:13,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:17:13,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:17:13,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:17:13,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:17:13,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:17:13,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:17:13,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:17:13,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:17:13,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:17:13,540 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:17:13,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:17:13,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:17:13,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-07-12 10:17:13,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:17:13,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:17:13,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:17:13,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:17:13,750 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:17:13,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-07-12 10:17:13,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05d56c46a/c9a3ae1be88f477286aae3e88d68cf5d/FLAG655740143 [2022-07-12 10:17:14,184 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:17:14,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-07-12 10:17:14,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05d56c46a/c9a3ae1be88f477286aae3e88d68cf5d/FLAG655740143 [2022-07-12 10:17:14,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05d56c46a/c9a3ae1be88f477286aae3e88d68cf5d [2022-07-12 10:17:14,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:17:14,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:17:14,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:17:14,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:17:14,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:17:14,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:14,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1403f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14, skipping insertion in model container [2022-07-12 10:17:14,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:14,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:17:14,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:17:14,874 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/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-07-12 10:17:14,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:17:14,899 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:17:14,928 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/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-07-12 10:17:14,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:17:14,974 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:17:14,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14 WrapperNode [2022-07-12 10:17:14,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:17:14,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:17:14,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:17:14,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:17:14,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,027 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-07-12 10:17:15,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:17:15,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:17:15,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:17:15,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:17:15,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:17:15,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:17:15,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:17:15,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:17:15,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (1/1) ... [2022-07-12 10:17:15,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:17:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:15,087 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) [2022-07-12 10:17:15,089 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 [2022-07-12 10:17:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:17:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:17:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:17:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:17:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:17:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:17:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:17:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:17:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:17:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:17:15,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:17:15,121 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:17:15,243 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:17:15,248 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:17:15,455 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:17:15,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:17:15,463 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-12 10:17:15,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:17:15 BoogieIcfgContainer [2022-07-12 10:17:15,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:17:15,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:17:15,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:17:15,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:17:15,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:17:14" (1/3) ... [2022-07-12 10:17:15,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c0e29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:17:15, skipping insertion in model container [2022-07-12 10:17:15,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:17:14" (2/3) ... [2022-07-12 10:17:15,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c0e29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:17:15, skipping insertion in model container [2022-07-12 10:17:15,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:17:15" (3/3) ... [2022-07-12 10:17:15,472 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-07-12 10:17:15,476 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:17:15,483 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:17:15,483 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:17:15,483 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:17:15,538 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:17:15,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 268 flow [2022-07-12 10:17:15,630 INFO L129 PetriNetUnfolder]: 30/188 cut-off events. [2022-07-12 10:17:15,630 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:15,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 565 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-07-12 10:17:15,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 130 transitions, 268 flow [2022-07-12 10:17:15,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 255 flow [2022-07-12 10:17:15,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:15,649 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:15,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:15,664 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-12 10:17:15,664 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:15,664 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:15,665 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] [2022-07-12 10:17:15,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:15,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1062996739, now seen corresponding path program 1 times [2022-07-12 10:17:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844064037] [2022-07-12 10:17:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:15,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:15,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844064037] [2022-07-12 10:17:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844064037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:15,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:15,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878173945] [2022-07-12 10:17:15,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:15,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:15,865 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 130 [2022-07-12 10:17:15,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 255 flow. Second operand has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2022-07-12 10:17:15,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:15,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 130 [2022-07-12 10:17:15,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:15,912 INFO L129 PetriNetUnfolder]: 1/153 cut-off events. [2022-07-12 10:17:15,912 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:17:15,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 153 events. 1/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 237 event pairs, 0 based on Foata normal form. 28/174 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2022-07-12 10:17:15,914 INFO L132 encePairwiseOnDemand]: 113/130 looper letters, 1 selfloop transitions, 0 changer transitions 0/107 dead transitions. [2022-07-12 10:17:15,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 221 flow [2022-07-12 10:17:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2022-07-12 10:17:15,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9153846153846154 [2022-07-12 10:17:15,923 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 238 transitions. [2022-07-12 10:17:15,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 238 transitions. [2022-07-12 10:17:15,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:15,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 238 transitions. [2022-07-12 10:17:15,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 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) [2022-07-12 10:17:15,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,931 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,932 INFO L186 Difference]: Start difference. First operand has 110 places, 125 transitions, 255 flow. Second operand 2 states and 238 transitions. [2022-07-12 10:17:15,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 221 flow [2022-07-12 10:17:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:15,938 INFO L242 Difference]: Finished difference. Result has 110 places, 107 transitions, 219 flow [2022-07-12 10:17:15,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=219, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2022-07-12 10:17:15,941 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-07-12 10:17:15,941 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 219 flow [2022-07-12 10:17:15,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2022-07-12 10:17:15,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:15,942 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:15,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:17:15,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1889734253, now seen corresponding path program 1 times [2022-07-12 10:17:15,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134660789] [2022-07-12 10:17:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:15,968 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:16,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:16,015 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:16,018 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:16,019 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:16,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:17:16,020 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:17:16,024 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:16,025 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:17:16,049 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:17:16,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-07-12 10:17:16,106 INFO L129 PetriNetUnfolder]: 51/304 cut-off events. [2022-07-12 10:17:16,106 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:17:16,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1043 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-07-12 10:17:16,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 163 transitions, 344 flow [2022-07-12 10:17:16,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 163 transitions, 344 flow [2022-07-12 10:17:16,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:16,117 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:16,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:16,131 INFO L129 PetriNetUnfolder]: 11/106 cut-off events. [2022-07-12 10:17:16,131 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:16,132 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,132 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] [2022-07-12 10:17:16,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash 613293600, now seen corresponding path program 1 times [2022-07-12 10:17:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487014837] [2022-07-12 10:17:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:16,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:16,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487014837] [2022-07-12 10:17:16,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487014837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:16,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:16,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:16,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667361418] [2022-07-12 10:17:16,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:16,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:16,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:16,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 163 [2022-07-12 10:17:16,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 344 flow. Second operand has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 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) [2022-07-12 10:17:16,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:16,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 163 [2022-07-12 10:17:16,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:16,279 INFO L129 PetriNetUnfolder]: 5/255 cut-off events. [2022-07-12 10:17:16,280 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-12 10:17:16,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 255 events. 5/255 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 60/303 useless extension candidates. Maximal degree in co-relation 162. Up to 7 conditions per place. [2022-07-12 10:17:16,283 INFO L132 encePairwiseOnDemand]: 140/163 looper letters, 4 selfloop transitions, 0 changer transitions 0/139 dead transitions. [2022-07-12 10:17:16,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 139 transitions, 304 flow [2022-07-12 10:17:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 297 transitions. [2022-07-12 10:17:16,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.911042944785276 [2022-07-12 10:17:16,287 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 297 transitions. [2022-07-12 10:17:16,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 297 transitions. [2022-07-12 10:17:16,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:16,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 297 transitions. [2022-07-12 10:17:16,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 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) [2022-07-12 10:17:16,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 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) [2022-07-12 10:17:16,293 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 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) [2022-07-12 10:17:16,293 INFO L186 Difference]: Start difference. First operand has 141 places, 163 transitions, 344 flow. Second operand 2 states and 297 transitions. [2022-07-12 10:17:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 139 transitions, 304 flow [2022-07-12 10:17:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 139 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:16,297 INFO L242 Difference]: Finished difference. Result has 141 places, 139 transitions, 296 flow [2022-07-12 10:17:16,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=296, PETRI_PLACES=141, PETRI_TRANSITIONS=139} [2022-07-12 10:17:16,299 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-12 10:17:16,299 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 139 transitions, 296 flow [2022-07-12 10:17:16,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 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) [2022-07-12 10:17:16,299 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,299 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:16,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:17:16,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -348807653, now seen corresponding path program 1 times [2022-07-12 10:17:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048347242] [2022-07-12 10:17:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:16,340 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:16,367 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:16,368 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:16,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:16,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:16,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:17:16,369 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:17:16,370 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:16,370 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:17:16,395 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:17:16,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-07-12 10:17:16,437 INFO L129 PetriNetUnfolder]: 77/453 cut-off events. [2022-07-12 10:17:16,438 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:16,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1696 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-07-12 10:17:16,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 422 flow [2022-07-12 10:17:16,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 196 transitions, 422 flow [2022-07-12 10:17:16,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:16,449 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:16,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:16,454 INFO L129 PetriNetUnfolder]: 11/99 cut-off events. [2022-07-12 10:17:16,454 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:16,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,454 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] [2022-07-12 10:17:16,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2125650499, now seen corresponding path program 1 times [2022-07-12 10:17:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889989656] [2022-07-12 10:17:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:16,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889989656] [2022-07-12 10:17:16,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889989656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:16,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:16,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106972110] [2022-07-12 10:17:16,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:16,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:16,528 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 196 [2022-07-12 10:17:16,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 196 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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) [2022-07-12 10:17:16,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:16,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 196 [2022-07-12 10:17:16,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:16,625 INFO L129 PetriNetUnfolder]: 10/350 cut-off events. [2022-07-12 10:17:16,626 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-12 10:17:16,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 350 events. 10/350 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1026 event pairs, 1 based on Foata normal form. 202/535 useless extension candidates. Maximal degree in co-relation 266. Up to 30 conditions per place. [2022-07-12 10:17:16,630 INFO L132 encePairwiseOnDemand]: 164/196 looper letters, 15 selfloop transitions, 2 changer transitions 0/170 dead transitions. [2022-07-12 10:17:16,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 170 transitions, 404 flow [2022-07-12 10:17:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2022-07-12 10:17:16,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8724489795918368 [2022-07-12 10:17:16,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2022-07-12 10:17:16,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2022-07-12 10:17:16,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:16,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2022-07-12 10:17:16,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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) [2022-07-12 10:17:16,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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) [2022-07-12 10:17:16,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 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) [2022-07-12 10:17:16,643 INFO L186 Difference]: Start difference. First operand has 168 places, 196 transitions, 422 flow. Second operand 3 states and 513 transitions. [2022-07-12 10:17:16,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 170 transitions, 404 flow [2022-07-12 10:17:16,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 170 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:16,651 INFO L242 Difference]: Finished difference. Result has 170 places, 167 transitions, 374 flow [2022-07-12 10:17:16,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2022-07-12 10:17:16,653 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 2 predicate places. [2022-07-12 10:17:16,653 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 374 flow [2022-07-12 10:17:16,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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) [2022-07-12 10:17:16,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,654 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:16,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:17:16,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash 882026184, now seen corresponding path program 1 times [2022-07-12 10:17:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300462595] [2022-07-12 10:17:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:16,700 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:16,732 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:16,734 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:16,734 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:16,734 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:17:16,734 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 10:17:16,735 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:16,735 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:17:16,760 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:17:16,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-07-12 10:17:16,818 INFO L129 PetriNetUnfolder]: 115/670 cut-off events. [2022-07-12 10:17:16,818 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:17:16,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2768 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-07-12 10:17:16,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 229 transitions, 502 flow [2022-07-12 10:17:16,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 229 transitions, 502 flow [2022-07-12 10:17:16,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:16,835 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:16,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:16,840 INFO L129 PetriNetUnfolder]: 11/100 cut-off events. [2022-07-12 10:17:16,840 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:16,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,840 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] [2022-07-12 10:17:16,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1208141495, now seen corresponding path program 1 times [2022-07-12 10:17:16,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931261583] [2022-07-12 10:17:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931261583] [2022-07-12 10:17:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931261583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:16,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273502890] [2022-07-12 10:17:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:16,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 229 [2022-07-12 10:17:16,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 229 transitions, 502 flow. Second operand has 2 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 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) [2022-07-12 10:17:16,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:16,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 229 [2022-07-12 10:17:16,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:16,975 INFO L129 PetriNetUnfolder]: 25/575 cut-off events. [2022-07-12 10:17:16,975 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-12 10:17:16,979 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 575 events. 25/575 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2209 event pairs, 6 based on Foata normal form. 280/825 useless extension candidates. Maximal degree in co-relation 418. Up to 37 conditions per place. [2022-07-12 10:17:16,981 INFO L132 encePairwiseOnDemand]: 194/229 looper letters, 8 selfloop transitions, 0 changer transitions 0/193 dead transitions. [2022-07-12 10:17:16,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 193 transitions, 446 flow [2022-07-12 10:17:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 413 transitions. [2022-07-12 10:17:16,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9017467248908297 [2022-07-12 10:17:16,983 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 413 transitions. [2022-07-12 10:17:16,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 413 transitions. [2022-07-12 10:17:16,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:16,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 413 transitions. [2022-07-12 10:17:16,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 206.5) internal successors, (413), 2 states have internal predecessors, (413), 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) [2022-07-12 10:17:16,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,985 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,985 INFO L186 Difference]: Start difference. First operand has 195 places, 229 transitions, 502 flow. Second operand 2 states and 413 transitions. [2022-07-12 10:17:16,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 193 transitions, 446 flow [2022-07-12 10:17:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 193 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:16,989 INFO L242 Difference]: Finished difference. Result has 195 places, 193 transitions, 430 flow [2022-07-12 10:17:16,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=430, PETRI_PLACES=195, PETRI_TRANSITIONS=193} [2022-07-12 10:17:16,990 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-07-12 10:17:16,990 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 193 transitions, 430 flow [2022-07-12 10:17:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 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) [2022-07-12 10:17:16,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,990 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] [2022-07-12 10:17:16,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:17:16,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1286607914, now seen corresponding path program 1 times [2022-07-12 10:17:16,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462107087] [2022-07-12 10:17:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:17,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462107087] [2022-07-12 10:17:17,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462107087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:17,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:17,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:17,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462618542] [2022-07-12 10:17:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:17,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:17,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:17,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 229 [2022-07-12 10:17:17,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 193 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2022-07-12 10:17:17,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:17,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 229 [2022-07-12 10:17:17,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:17,128 INFO L129 PetriNetUnfolder]: 24/542 cut-off events. [2022-07-12 10:17:17,128 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-12 10:17:17,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 542 events. 24/542 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2014 event pairs, 6 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 652. Up to 56 conditions per place. [2022-07-12 10:17:17,134 INFO L132 encePairwiseOnDemand]: 226/229 looper letters, 17 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2022-07-12 10:17:17,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 197 transitions, 476 flow [2022-07-12 10:17:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-07-12 10:17:17,136 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064046579330422 [2022-07-12 10:17:17,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-07-12 10:17:17,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-07-12 10:17:17,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:17,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-07-12 10:17:17,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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) [2022-07-12 10:17:17,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-07-12 10:17:17,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2022-07-12 10:17:17,139 INFO L186 Difference]: Start difference. First operand has 195 places, 193 transitions, 430 flow. Second operand 3 states and 554 transitions. [2022-07-12 10:17:17,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 197 transitions, 476 flow [2022-07-12 10:17:17,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 197 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:17,142 INFO L242 Difference]: Finished difference. Result has 198 places, 194 transitions, 442 flow [2022-07-12 10:17:17,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=198, PETRI_TRANSITIONS=194} [2022-07-12 10:17:17,144 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 3 predicate places. [2022-07-12 10:17:17,144 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 194 transitions, 442 flow [2022-07-12 10:17:17,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2022-07-12 10:17:17,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:17,144 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:17,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:17:17,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:17,145 INFO L85 PathProgramCache]: Analyzing trace with hash 956024503, now seen corresponding path program 1 times [2022-07-12 10:17:17,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:17,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211477979] [2022-07-12 10:17:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:17,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211477979] [2022-07-12 10:17:17,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211477979] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121703874] [2022-07-12 10:17:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:17,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:17,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:17,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:17,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:17:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:17,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121703874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:17,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:17,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779488027] [2022-07-12 10:17:17,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:17,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:17,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:17,447 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 229 [2022-07-12 10:17:17,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 194 transitions, 442 flow. Second operand has 10 states, 10 states have (on average 179.3) internal successors, (1793), 10 states have internal predecessors, (1793), 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) [2022-07-12 10:17:17,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:17,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 229 [2022-07-12 10:17:17,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:17,586 INFO L129 PetriNetUnfolder]: 22/476 cut-off events. [2022-07-12 10:17:17,587 INFO L130 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-07-12 10:17:17,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 476 events. 22/476 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1580 event pairs, 10 based on Foata normal form. 2/456 useless extension candidates. Maximal degree in co-relation 596. Up to 40 conditions per place. [2022-07-12 10:17:17,592 INFO L132 encePairwiseOnDemand]: 223/229 looper letters, 18 selfloop transitions, 9 changer transitions 0/204 dead transitions. [2022-07-12 10:17:17,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 204 transitions, 518 flow [2022-07-12 10:17:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1622 transitions. [2022-07-12 10:17:17,596 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7869966035904901 [2022-07-12 10:17:17,596 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1622 transitions. [2022-07-12 10:17:17,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1622 transitions. [2022-07-12 10:17:17,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:17,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1622 transitions. [2022-07-12 10:17:17,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 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) [2022-07-12 10:17:17,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 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) [2022-07-12 10:17:17,603 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 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) [2022-07-12 10:17:17,604 INFO L186 Difference]: Start difference. First operand has 198 places, 194 transitions, 442 flow. Second operand 9 states and 1622 transitions. [2022-07-12 10:17:17,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 204 transitions, 518 flow [2022-07-12 10:17:17,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 204 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:17,609 INFO L242 Difference]: Finished difference. Result has 208 places, 200 transitions, 490 flow [2022-07-12 10:17:17,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=208, PETRI_TRANSITIONS=200} [2022-07-12 10:17:17,610 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 13 predicate places. [2022-07-12 10:17:17,610 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 200 transitions, 490 flow [2022-07-12 10:17:17,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.3) internal successors, (1793), 10 states have internal predecessors, (1793), 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) [2022-07-12 10:17:17,611 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:17,611 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:17,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:17,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:17,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1196007636, now seen corresponding path program 1 times [2022-07-12 10:17:17,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:17,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738280478] [2022-07-12 10:17:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:17,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:17,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:17,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:17,891 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:17,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:17,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:17,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:17:17,892 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:17:17,892 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:17,892 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:17:17,912 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:17:17,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 222 places, 262 transitions, 584 flow [2022-07-12 10:17:18,012 INFO L129 PetriNetUnfolder]: 181/1027 cut-off events. [2022-07-12 10:17:18,013 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:17:18,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 1027 events. 181/1027 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4854 event pairs, 23 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 715. Up to 80 conditions per place. [2022-07-12 10:17:18,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 262 transitions, 584 flow [2022-07-12 10:17:18,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 262 transitions, 584 flow [2022-07-12 10:17:18,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:18,038 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:18,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:18,042 INFO L129 PetriNetUnfolder]: 11/100 cut-off events. [2022-07-12 10:17:18,042 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:18,042 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:18,042 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] [2022-07-12 10:17:18,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:18,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash -410899633, now seen corresponding path program 1 times [2022-07-12 10:17:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:18,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874602113] [2022-07-12 10:17:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:18,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874602113] [2022-07-12 10:17:18,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874602113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:18,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:18,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152453142] [2022-07-12 10:17:18,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:18,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:18,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:18,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:18,063 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 262 [2022-07-12 10:17:18,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 584 flow. Second operand has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 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) [2022-07-12 10:17:18,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:18,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 262 [2022-07-12 10:17:18,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:18,186 INFO L129 PetriNetUnfolder]: 59/899 cut-off events. [2022-07-12 10:17:18,187 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-12 10:17:18,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 899 events. 59/899 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4150 event pairs, 23 based on Foata normal form. 613/1463 useless extension candidates. Maximal degree in co-relation 656. Up to 86 conditions per place. [2022-07-12 10:17:18,197 INFO L132 encePairwiseOnDemand]: 221/262 looper letters, 10 selfloop transitions, 0 changer transitions 0/220 dead transitions. [2022-07-12 10:17:18,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 220 transitions, 520 flow [2022-07-12 10:17:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 471 transitions. [2022-07-12 10:17:18,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.898854961832061 [2022-07-12 10:17:18,199 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 471 transitions. [2022-07-12 10:17:18,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 471 transitions. [2022-07-12 10:17:18,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:18,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 471 transitions. [2022-07-12 10:17:18,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 235.5) internal successors, (471), 2 states have internal predecessors, (471), 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) [2022-07-12 10:17:18,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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) [2022-07-12 10:17:18,202 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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) [2022-07-12 10:17:18,202 INFO L186 Difference]: Start difference. First operand has 222 places, 262 transitions, 584 flow. Second operand 2 states and 471 transitions. [2022-07-12 10:17:18,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 220 transitions, 520 flow [2022-07-12 10:17:18,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 220 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:18,205 INFO L242 Difference]: Finished difference. Result has 222 places, 220 transitions, 500 flow [2022-07-12 10:17:18,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=500, PETRI_PLACES=222, PETRI_TRANSITIONS=220} [2022-07-12 10:17:18,206 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 0 predicate places. [2022-07-12 10:17:18,206 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 220 transitions, 500 flow [2022-07-12 10:17:18,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 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) [2022-07-12 10:17:18,207 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:18,207 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] [2022-07-12 10:17:18,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:17:18,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1352321322, now seen corresponding path program 1 times [2022-07-12 10:17:18,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:18,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717056178] [2022-07-12 10:17:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717056178] [2022-07-12 10:17:18,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717056178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:18,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:18,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962588936] [2022-07-12 10:17:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:18,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:18,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 262 [2022-07-12 10:17:18,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 220 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2022-07-12 10:17:18,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:18,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 262 [2022-07-12 10:17:18,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:18,367 INFO L129 PetriNetUnfolder]: 58/866 cut-off events. [2022-07-12 10:17:18,367 INFO L130 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2022-07-12 10:17:18,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 866 events. 58/866 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3979 event pairs, 23 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 1085. Up to 110 conditions per place. [2022-07-12 10:17:18,381 INFO L132 encePairwiseOnDemand]: 259/262 looper letters, 19 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-07-12 10:17:18,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 224 transitions, 550 flow [2022-07-12 10:17:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-07-12 10:17:18,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8027989821882952 [2022-07-12 10:17:18,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-07-12 10:17:18,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-07-12 10:17:18,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:18,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-07-12 10:17:18,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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) [2022-07-12 10:17:18,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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) [2022-07-12 10:17:18,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 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) [2022-07-12 10:17:18,386 INFO L186 Difference]: Start difference. First operand has 222 places, 220 transitions, 500 flow. Second operand 3 states and 631 transitions. [2022-07-12 10:17:18,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 224 transitions, 550 flow [2022-07-12 10:17:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 224 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:18,417 INFO L242 Difference]: Finished difference. Result has 225 places, 221 transitions, 512 flow [2022-07-12 10:17:18,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=512, PETRI_PLACES=225, PETRI_TRANSITIONS=221} [2022-07-12 10:17:18,418 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 3 predicate places. [2022-07-12 10:17:18,418 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 221 transitions, 512 flow [2022-07-12 10:17:18,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2022-07-12 10:17:18,419 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:18,419 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:18,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:17:18,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash -752041066, now seen corresponding path program 1 times [2022-07-12 10:17:18,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202528775] [2022-07-12 10:17:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202528775] [2022-07-12 10:17:18,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202528775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125030527] [2022-07-12 10:17:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:18,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:18,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:17:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125030527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:18,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:18,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422777838] [2022-07-12 10:17:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:18,583 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 262 [2022-07-12 10:17:18,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 221 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 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) [2022-07-12 10:17:18,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:18,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 262 [2022-07-12 10:17:18,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:18,737 INFO L129 PetriNetUnfolder]: 56/800 cut-off events. [2022-07-12 10:17:18,738 INFO L130 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-07-12 10:17:18,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 800 events. 56/800 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3553 event pairs, 27 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 1032. Up to 91 conditions per place. [2022-07-12 10:17:18,749 INFO L132 encePairwiseOnDemand]: 256/262 looper letters, 20 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-07-12 10:17:18,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 592 flow [2022-07-12 10:17:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1849 transitions. [2022-07-12 10:17:18,753 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7841391009329941 [2022-07-12 10:17:18,753 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1849 transitions. [2022-07-12 10:17:18,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1849 transitions. [2022-07-12 10:17:18,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:18,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1849 transitions. [2022-07-12 10:17:18,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.44444444444446) internal successors, (1849), 9 states have internal predecessors, (1849), 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) [2022-07-12 10:17:18,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 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) [2022-07-12 10:17:18,759 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 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) [2022-07-12 10:17:18,760 INFO L186 Difference]: Start difference. First operand has 225 places, 221 transitions, 512 flow. Second operand 9 states and 1849 transitions. [2022-07-12 10:17:18,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 592 flow [2022-07-12 10:17:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 231 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:18,764 INFO L242 Difference]: Finished difference. Result has 235 places, 227 transitions, 560 flow [2022-07-12 10:17:18,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=560, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-07-12 10:17:18,764 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 13 predicate places. [2022-07-12 10:17:18,764 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 560 flow [2022-07-12 10:17:18,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 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) [2022-07-12 10:17:18,765 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:18,766 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:18,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:18,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:17:18,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1501799583, now seen corresponding path program 1 times [2022-07-12 10:17:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:18,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577453603] [2022-07-12 10:17:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:18,998 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:19,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:19,025 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:19,026 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:19,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:19,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:17:19,026 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:17:19,027 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:19,027 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:17:19,047 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-12 10:17:19,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 249 places, 295 transitions, 668 flow [2022-07-12 10:17:19,260 INFO L129 PetriNetUnfolder]: 311/1672 cut-off events. [2022-07-12 10:17:19,261 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-12 10:17:19,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 1672 events. 311/1672 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9476 event pairs, 72 based on Foata normal form. 0/1418 useless extension candidates. Maximal degree in co-relation 1126. Up to 192 conditions per place. [2022-07-12 10:17:19,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 295 transitions, 668 flow [2022-07-12 10:17:19,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 295 transitions, 668 flow [2022-07-12 10:17:19,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:19,287 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:19,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:19,291 INFO L129 PetriNetUnfolder]: 10/103 cut-off events. [2022-07-12 10:17:19,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:19,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:19,291 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] [2022-07-12 10:17:19,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash 222408789, now seen corresponding path program 1 times [2022-07-12 10:17:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:19,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227416869] [2022-07-12 10:17:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:19,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:19,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:19,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227416869] [2022-07-12 10:17:19,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227416869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:19,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:19,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047873662] [2022-07-12 10:17:19,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:19,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 295 [2022-07-12 10:17:19,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 295 transitions, 668 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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) [2022-07-12 10:17:19,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:19,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 295 [2022-07-12 10:17:19,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:19,561 INFO L129 PetriNetUnfolder]: 140/1462 cut-off events. [2022-07-12 10:17:19,562 INFO L130 PetriNetUnfolder]: For 626/626 co-relation queries the response was YES. [2022-07-12 10:17:19,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1927 conditions, 1462 events. 140/1462 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8325 event pairs, 72 based on Foata normal form. 1761/3141 useless extension candidates. Maximal degree in co-relation 1101. Up to 228 conditions per place. [2022-07-12 10:17:19,582 INFO L132 encePairwiseOnDemand]: 245/295 looper letters, 21 selfloop transitions, 2 changer transitions 0/251 dead transitions. [2022-07-12 10:17:19,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 251 transitions, 626 flow [2022-07-12 10:17:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2022-07-12 10:17:19,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8610169491525423 [2022-07-12 10:17:19,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2022-07-12 10:17:19,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2022-07-12 10:17:19,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:19,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2022-07-12 10:17:19,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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) [2022-07-12 10:17:19,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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) [2022-07-12 10:17:19,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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) [2022-07-12 10:17:19,587 INFO L186 Difference]: Start difference. First operand has 249 places, 295 transitions, 668 flow. Second operand 3 states and 762 transitions. [2022-07-12 10:17:19,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 251 transitions, 626 flow [2022-07-12 10:17:19,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 251 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:19,590 INFO L242 Difference]: Finished difference. Result has 251 places, 248 transitions, 584 flow [2022-07-12 10:17:19,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=584, PETRI_PLACES=251, PETRI_TRANSITIONS=248} [2022-07-12 10:17:19,591 INFO L279 CegarLoopForPetriNet]: 249 programPoint places, 2 predicate places. [2022-07-12 10:17:19,591 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 248 transitions, 584 flow [2022-07-12 10:17:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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) [2022-07-12 10:17:19,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:19,592 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:19,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:17:19,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1411004267, now seen corresponding path program 1 times [2022-07-12 10:17:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013788471] [2022-07-12 10:17:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:19,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013788471] [2022-07-12 10:17:19,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013788471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:19,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409571236] [2022-07-12 10:17:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:19,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:19,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:19,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:17:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:19,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:19,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:19,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409571236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:19,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:19,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285092571] [2022-07-12 10:17:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:19,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:19,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 295 [2022-07-12 10:17:19,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 248 transitions, 584 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 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) [2022-07-12 10:17:19,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:19,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 295 [2022-07-12 10:17:19,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,026 INFO L129 PetriNetUnfolder]: 138/1396 cut-off events. [2022-07-12 10:17:20,027 INFO L130 PetriNetUnfolder]: For 629/629 co-relation queries the response was YES. [2022-07-12 10:17:20,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 1396 events. 138/1396 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7907 event pairs, 76 based on Foata normal form. 2/1324 useless extension candidates. Maximal degree in co-relation 1819. Up to 206 conditions per place. [2022-07-12 10:17:20,048 INFO L132 encePairwiseOnDemand]: 289/295 looper letters, 22 selfloop transitions, 9 changer transitions 0/258 dead transitions. [2022-07-12 10:17:20,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 258 transitions, 668 flow [2022-07-12 10:17:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2076 transitions. [2022-07-12 10:17:20,053 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7819209039548023 [2022-07-12 10:17:20,053 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2076 transitions. [2022-07-12 10:17:20,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2076 transitions. [2022-07-12 10:17:20,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2076 transitions. [2022-07-12 10:17:20,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 230.66666666666666) internal successors, (2076), 9 states have internal predecessors, (2076), 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) [2022-07-12 10:17:20,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 295.0) internal successors, (2950), 10 states have internal predecessors, (2950), 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) [2022-07-12 10:17:20,062 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 295.0) internal successors, (2950), 10 states have internal predecessors, (2950), 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) [2022-07-12 10:17:20,062 INFO L186 Difference]: Start difference. First operand has 251 places, 248 transitions, 584 flow. Second operand 9 states and 2076 transitions. [2022-07-12 10:17:20,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 258 transitions, 668 flow [2022-07-12 10:17:20,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 258 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:20,066 INFO L242 Difference]: Finished difference. Result has 261 places, 254 transitions, 632 flow [2022-07-12 10:17:20,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=632, PETRI_PLACES=261, PETRI_TRANSITIONS=254} [2022-07-12 10:17:20,067 INFO L279 CegarLoopForPetriNet]: 249 programPoint places, 12 predicate places. [2022-07-12 10:17:20,067 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 254 transitions, 632 flow [2022-07-12 10:17:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 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) [2022-07-12 10:17:20,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,068 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:20,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:20,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:20,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 187363310, now seen corresponding path program 1 times [2022-07-12 10:17:20,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555839159] [2022-07-12 10:17:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:20,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555839159] [2022-07-12 10:17:20,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555839159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:20,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077239233] [2022-07-12 10:17:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:20,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:20,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:17:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077239233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:20,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:20,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533218630] [2022-07-12 10:17:20,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:20,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:20,546 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 295 [2022-07-12 10:17:20,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 254 transitions, 632 flow. Second operand has 18 states, 18 states have (on average 229.61111111111111) internal successors, (4133), 18 states have internal predecessors, (4133), 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) [2022-07-12 10:17:20,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,549 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 295 [2022-07-12 10:17:20,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,726 INFO L129 PetriNetUnfolder]: 6/244 cut-off events. [2022-07-12 10:17:20,727 INFO L130 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-07-12 10:17:20,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 244 events. 6/244 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 465 event pairs, 0 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 298. Up to 9 conditions per place. [2022-07-12 10:17:20,730 INFO L132 encePairwiseOnDemand]: 290/295 looper letters, 21 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2022-07-12 10:17:20,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 222 transitions, 670 flow [2022-07-12 10:17:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4811 transitions. [2022-07-12 10:17:20,745 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765940274414851 [2022-07-12 10:17:20,745 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4811 transitions. [2022-07-12 10:17:20,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4811 transitions. [2022-07-12 10:17:20,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4811 transitions. [2022-07-12 10:17:20,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 229.0952380952381) internal successors, (4811), 21 states have internal predecessors, (4811), 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) [2022-07-12 10:17:20,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 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) [2022-07-12 10:17:20,761 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 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) [2022-07-12 10:17:20,761 INFO L186 Difference]: Start difference. First operand has 261 places, 254 transitions, 632 flow. Second operand 21 states and 4811 transitions. [2022-07-12 10:17:20,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 222 transitions, 670 flow [2022-07-12 10:17:20,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 222 transitions, 615 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-07-12 10:17:20,765 INFO L242 Difference]: Finished difference. Result has 231 places, 211 transitions, 538 flow [2022-07-12 10:17:20,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=538, PETRI_PLACES=231, PETRI_TRANSITIONS=211} [2022-07-12 10:17:20,766 INFO L279 CegarLoopForPetriNet]: 249 programPoint places, -18 predicate places. [2022-07-12 10:17:20,766 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 211 transitions, 538 flow [2022-07-12 10:17:20,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 229.61111111111111) internal successors, (4133), 18 states have internal predecessors, (4133), 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) [2022-07-12 10:17:20,767 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,768 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:20,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:20,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:17:20,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash -661165431, now seen corresponding path program 1 times [2022-07-12 10:17:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640940783] [2022-07-12 10:17:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:21,016 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:21,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:21,035 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:21,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:21,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:17:21,036 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:17:21,038 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:21,038 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:17:21,059 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-12 10:17:21,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 328 transitions, 754 flow [2022-07-12 10:17:21,420 INFO L129 PetriNetUnfolder]: 585/2909 cut-off events. [2022-07-12 10:17:21,420 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-12 10:17:21,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 2909 events. 585/2909 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 19704 event pairs, 201 based on Foata normal form. 0/2508 useless extension candidates. Maximal degree in co-relation 1890. Up to 448 conditions per place. [2022-07-12 10:17:21,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 328 transitions, 754 flow [2022-07-12 10:17:21,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 328 transitions, 754 flow [2022-07-12 10:17:21,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:21,493 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:21,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:21,496 INFO L129 PetriNetUnfolder]: 11/102 cut-off events. [2022-07-12 10:17:21,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:21,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,496 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] [2022-07-12 10:17:21,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 433618333, now seen corresponding path program 1 times [2022-07-12 10:17:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:21,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605781800] [2022-07-12 10:17:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:21,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605781800] [2022-07-12 10:17:21,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605781800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:21,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:21,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:21,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248078554] [2022-07-12 10:17:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:21,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:21,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 328 [2022-07-12 10:17:21,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 328 transitions, 754 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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) [2022-07-12 10:17:21,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:21,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 328 [2022-07-12 10:17:21,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:21,998 INFO L129 PetriNetUnfolder]: 334/2618 cut-off events. [2022-07-12 10:17:21,998 INFO L130 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2022-07-12 10:17:22,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 2618 events. 334/2618 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18131 event pairs, 201 based on Foata normal form. 3576/6045 useless extension candidates. Maximal degree in co-relation 1936. Up to 490 conditions per place. [2022-07-12 10:17:22,038 INFO L132 encePairwiseOnDemand]: 272/328 looper letters, 23 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-07-12 10:17:22,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 278 transitions, 704 flow [2022-07-12 10:17:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2022-07-12 10:17:22,040 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.858739837398374 [2022-07-12 10:17:22,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2022-07-12 10:17:22,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2022-07-12 10:17:22,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:22,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2022-07-12 10:17:22,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 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) [2022-07-12 10:17:22,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 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) [2022-07-12 10:17:22,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 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) [2022-07-12 10:17:22,043 INFO L186 Difference]: Start difference. First operand has 276 places, 328 transitions, 754 flow. Second operand 3 states and 845 transitions. [2022-07-12 10:17:22,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 278 transitions, 704 flow [2022-07-12 10:17:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 278 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:22,048 INFO L242 Difference]: Finished difference. Result has 278 places, 275 transitions, 658 flow [2022-07-12 10:17:22,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=658, PETRI_PLACES=278, PETRI_TRANSITIONS=275} [2022-07-12 10:17:22,048 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, 2 predicate places. [2022-07-12 10:17:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 275 transitions, 658 flow [2022-07-12 10:17:22,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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) [2022-07-12 10:17:22,049 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:22,049 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:17:22,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1020865100, now seen corresponding path program 1 times [2022-07-12 10:17:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317658488] [2022-07-12 10:17:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:22,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317658488] [2022-07-12 10:17:22,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317658488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730558049] [2022-07-12 10:17:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:22,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:22,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:17:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:22,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730558049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:22,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:22,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35282395] [2022-07-12 10:17:22,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:22,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:22,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:22,212 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 328 [2022-07-12 10:17:22,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 275 transitions, 658 flow. Second operand has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 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) [2022-07-12 10:17:22,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:22,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 328 [2022-07-12 10:17:22,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:22,681 INFO L129 PetriNetUnfolder]: 332/2552 cut-off events. [2022-07-12 10:17:22,681 INFO L130 PetriNetUnfolder]: For 1424/1424 co-relation queries the response was YES. [2022-07-12 10:17:22,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 2552 events. 332/2552 cut-off events. For 1424/1424 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 17819 event pairs, 205 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 3505. Up to 465 conditions per place. [2022-07-12 10:17:22,727 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 24 selfloop transitions, 9 changer transitions 0/285 dead transitions. [2022-07-12 10:17:22,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 285 transitions, 746 flow [2022-07-12 10:17:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2303 transitions. [2022-07-12 10:17:22,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7801490514905149 [2022-07-12 10:17:22,733 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2303 transitions. [2022-07-12 10:17:22,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2303 transitions. [2022-07-12 10:17:22,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:22,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2303 transitions. [2022-07-12 10:17:22,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.88888888888889) internal successors, (2303), 9 states have internal predecessors, (2303), 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) [2022-07-12 10:17:22,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 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) [2022-07-12 10:17:22,743 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 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) [2022-07-12 10:17:22,743 INFO L186 Difference]: Start difference. First operand has 278 places, 275 transitions, 658 flow. Second operand 9 states and 2303 transitions. [2022-07-12 10:17:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 285 transitions, 746 flow [2022-07-12 10:17:22,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 285 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:22,747 INFO L242 Difference]: Finished difference. Result has 288 places, 281 transitions, 706 flow [2022-07-12 10:17:22,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=706, PETRI_PLACES=288, PETRI_TRANSITIONS=281} [2022-07-12 10:17:22,748 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, 12 predicate places. [2022-07-12 10:17:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 281 transitions, 706 flow [2022-07-12 10:17:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 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) [2022-07-12 10:17:22,748 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:22,749 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:22,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:22,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1719812341, now seen corresponding path program 1 times [2022-07-12 10:17:22,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:22,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601802414] [2022-07-12 10:17:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:23,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601802414] [2022-07-12 10:17:23,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601802414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:23,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426940734] [2022-07-12 10:17:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:23,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:23,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:23,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:17:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426940734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:23,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:23,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:23,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071144867] [2022-07-12 10:17:23,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:23,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:23,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:23,229 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 328 [2022-07-12 10:17:23,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 281 transitions, 706 flow. Second operand has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 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) [2022-07-12 10:17:23,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:23,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 328 [2022-07-12 10:17:23,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:23,766 INFO L129 PetriNetUnfolder]: 328/2420 cut-off events. [2022-07-12 10:17:23,766 INFO L130 PetriNetUnfolder]: For 1451/1451 co-relation queries the response was YES. [2022-07-12 10:17:23,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3471 conditions, 2420 events. 328/2420 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 17869 event pairs, 321 based on Foata normal form. 4/2288 useless extension candidates. Maximal degree in co-relation 3216. Up to 453 conditions per place. [2022-07-12 10:17:23,805 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 32 selfloop transitions, 21 changer transitions 0/305 dead transitions. [2022-07-12 10:17:23,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 305 transitions, 920 flow [2022-07-12 10:17:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5349 transitions. [2022-07-12 10:17:23,814 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765679442508711 [2022-07-12 10:17:23,814 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5349 transitions. [2022-07-12 10:17:23,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5349 transitions. [2022-07-12 10:17:23,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:23,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5349 transitions. [2022-07-12 10:17:23,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 254.71428571428572) internal successors, (5349), 21 states have internal predecessors, (5349), 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) [2022-07-12 10:17:23,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 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) [2022-07-12 10:17:23,833 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 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) [2022-07-12 10:17:23,833 INFO L186 Difference]: Start difference. First operand has 288 places, 281 transitions, 706 flow. Second operand 21 states and 5349 transitions. [2022-07-12 10:17:23,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 305 transitions, 920 flow [2022-07-12 10:17:23,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 305 transitions, 906 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:23,838 INFO L242 Difference]: Finished difference. Result has 312 places, 294 transitions, 830 flow [2022-07-12 10:17:23,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=830, PETRI_PLACES=312, PETRI_TRANSITIONS=294} [2022-07-12 10:17:23,839 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, 36 predicate places. [2022-07-12 10:17:23,839 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 294 transitions, 830 flow [2022-07-12 10:17:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 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) [2022-07-12 10:17:23,840 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:23,840 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:23,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:24,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:24,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1742910734, now seen corresponding path program 1 times [2022-07-12 10:17:24,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:24,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225453143] [2022-07-12 10:17:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:24,076 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:24,091 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:24,091 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:24,091 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:24,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 10:17:24,092 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:17:24,092 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:24,092 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-12 10:17:24,110 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-12 10:17:24,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 303 places, 361 transitions, 842 flow [2022-07-12 10:17:24,993 INFO L129 PetriNetUnfolder]: 1179/5362 cut-off events. [2022-07-12 10:17:24,993 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-12 10:17:25,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6447 conditions, 5362 events. 1179/5362 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 43068 event pairs, 522 based on Foata normal form. 0/4686 useless extension candidates. Maximal degree in co-relation 3391. Up to 1024 conditions per place. [2022-07-12 10:17:25,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 361 transitions, 842 flow [2022-07-12 10:17:25,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 361 transitions, 842 flow [2022-07-12 10:17:25,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:25,103 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:25,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:25,106 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-12 10:17:25,106 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:25,107 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:25,107 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] [2022-07-12 10:17:25,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash 222728999, now seen corresponding path program 1 times [2022-07-12 10:17:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:25,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279003431] [2022-07-12 10:17:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:25,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:25,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279003431] [2022-07-12 10:17:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279003431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:25,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:25,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971227593] [2022-07-12 10:17:25,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:25,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:25,120 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 361 [2022-07-12 10:17:25,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 361 transitions, 842 flow. Second operand has 2 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 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) [2022-07-12 10:17:25,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:25,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 361 [2022-07-12 10:17:25,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:25,927 INFO L129 PetriNetUnfolder]: 785/4959 cut-off events. [2022-07-12 10:17:25,927 INFO L130 PetriNetUnfolder]: For 3220/3220 co-relation queries the response was YES. [2022-07-12 10:17:25,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 4959 events. 785/4959 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41143 event pairs, 522 based on Foata normal form. 6624/11301 useless extension candidates. Maximal degree in co-relation 3588. Up to 1033 conditions per place. [2022-07-12 10:17:26,012 INFO L132 encePairwiseOnDemand]: 302/361 looper letters, 16 selfloop transitions, 0 changer transitions 0/301 dead transitions. [2022-07-12 10:17:26,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 301 transitions, 754 flow [2022-07-12 10:17:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 645 transitions. [2022-07-12 10:17:26,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8933518005540166 [2022-07-12 10:17:26,014 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 645 transitions. [2022-07-12 10:17:26,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 645 transitions. [2022-07-12 10:17:26,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:26,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 645 transitions. [2022-07-12 10:17:26,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 322.5) internal successors, (645), 2 states have internal predecessors, (645), 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) [2022-07-12 10:17:26,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 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) [2022-07-12 10:17:26,016 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 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) [2022-07-12 10:17:26,016 INFO L186 Difference]: Start difference. First operand has 303 places, 361 transitions, 842 flow. Second operand 2 states and 645 transitions. [2022-07-12 10:17:26,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 301 transitions, 754 flow [2022-07-12 10:17:26,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 301 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:26,021 INFO L242 Difference]: Finished difference. Result has 303 places, 301 transitions, 722 flow [2022-07-12 10:17:26,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=722, PETRI_PLACES=303, PETRI_TRANSITIONS=301} [2022-07-12 10:17:26,021 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 0 predicate places. [2022-07-12 10:17:26,021 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 301 transitions, 722 flow [2022-07-12 10:17:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 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) [2022-07-12 10:17:26,022 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:26,022 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] [2022-07-12 10:17:26,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 10:17:26,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:26,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash -302465750, now seen corresponding path program 1 times [2022-07-12 10:17:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813680371] [2022-07-12 10:17:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:26,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:26,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813680371] [2022-07-12 10:17:26,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813680371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:26,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:26,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:26,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6977701] [2022-07-12 10:17:26,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:26,037 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 361 [2022-07-12 10:17:26,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 301 transitions, 722 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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) [2022-07-12 10:17:26,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:26,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 361 [2022-07-12 10:17:26,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:26,920 INFO L129 PetriNetUnfolder]: 784/4926 cut-off events. [2022-07-12 10:17:26,921 INFO L130 PetriNetUnfolder]: For 3184/3184 co-relation queries the response was YES. [2022-07-12 10:17:27,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7089 conditions, 4926 events. 784/4926 cut-off events. For 3184/3184 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 40991 event pairs, 522 based on Foata normal form. 0/4646 useless extension candidates. Maximal degree in co-relation 7078. Up to 1072 conditions per place. [2022-07-12 10:17:27,037 INFO L132 encePairwiseOnDemand]: 358/361 looper letters, 25 selfloop transitions, 2 changer transitions 0/305 dead transitions. [2022-07-12 10:17:27,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 305 transitions, 784 flow [2022-07-12 10:17:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2022-07-12 10:17:27,039 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959372114496768 [2022-07-12 10:17:27,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2022-07-12 10:17:27,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2022-07-12 10:17:27,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:27,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2022-07-12 10:17:27,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 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) [2022-07-12 10:17:27,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 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) [2022-07-12 10:17:27,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 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) [2022-07-12 10:17:27,042 INFO L186 Difference]: Start difference. First operand has 303 places, 301 transitions, 722 flow. Second operand 3 states and 862 transitions. [2022-07-12 10:17:27,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 305 transitions, 784 flow [2022-07-12 10:17:27,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 305 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:27,046 INFO L242 Difference]: Finished difference. Result has 306 places, 302 transitions, 734 flow [2022-07-12 10:17:27,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=734, PETRI_PLACES=306, PETRI_TRANSITIONS=302} [2022-07-12 10:17:27,047 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 3 predicate places. [2022-07-12 10:17:27,047 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 302 transitions, 734 flow [2022-07-12 10:17:27,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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) [2022-07-12 10:17:27,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:27,047 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:27,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 10:17:27,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:27,048 INFO L85 PathProgramCache]: Analyzing trace with hash 418376435, now seen corresponding path program 1 times [2022-07-12 10:17:27,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242767424] [2022-07-12 10:17:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242767424] [2022-07-12 10:17:27,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242767424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268791024] [2022-07-12 10:17:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:27,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:27,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:17:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268791024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:27,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:27,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:27,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359591582] [2022-07-12 10:17:27,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:27,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 361 [2022-07-12 10:17:27,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 302 transitions, 734 flow. Second operand has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 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) [2022-07-12 10:17:27,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:27,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 361 [2022-07-12 10:17:27,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:28,086 INFO L129 PetriNetUnfolder]: 782/4860 cut-off events. [2022-07-12 10:17:28,087 INFO L130 PetriNetUnfolder]: For 3187/3187 co-relation queries the response was YES. [2022-07-12 10:17:28,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 4860 events. 782/4860 cut-off events. For 3187/3187 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 40660 event pairs, 526 based on Foata normal form. 2/4592 useless extension candidates. Maximal degree in co-relation 7034. Up to 1044 conditions per place. [2022-07-12 10:17:28,193 INFO L132 encePairwiseOnDemand]: 355/361 looper letters, 26 selfloop transitions, 9 changer transitions 0/312 dead transitions. [2022-07-12 10:17:28,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 312 transitions, 826 flow [2022-07-12 10:17:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2530 transitions. [2022-07-12 10:17:28,196 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7787011388119421 [2022-07-12 10:17:28,196 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2530 transitions. [2022-07-12 10:17:28,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2530 transitions. [2022-07-12 10:17:28,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:28,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2530 transitions. [2022-07-12 10:17:28,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.1111111111111) internal successors, (2530), 9 states have internal predecessors, (2530), 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) [2022-07-12 10:17:28,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 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) [2022-07-12 10:17:28,202 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 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) [2022-07-12 10:17:28,202 INFO L186 Difference]: Start difference. First operand has 306 places, 302 transitions, 734 flow. Second operand 9 states and 2530 transitions. [2022-07-12 10:17:28,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 312 transitions, 826 flow [2022-07-12 10:17:28,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 312 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:28,207 INFO L242 Difference]: Finished difference. Result has 316 places, 308 transitions, 782 flow [2022-07-12 10:17:28,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=782, PETRI_PLACES=316, PETRI_TRANSITIONS=308} [2022-07-12 10:17:28,208 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 13 predicate places. [2022-07-12 10:17:28,208 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 308 transitions, 782 flow [2022-07-12 10:17:28,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 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) [2022-07-12 10:17:28,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:28,209 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:28,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:28,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash 130779016, now seen corresponding path program 1 times [2022-07-12 10:17:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:28,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654658534] [2022-07-12 10:17:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654658534] [2022-07-12 10:17:28,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654658534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215312594] [2022-07-12 10:17:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:28,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:17:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215312594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:28,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:28,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:28,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772431739] [2022-07-12 10:17:28,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:28,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:28,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:28,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:28,693 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 361 [2022-07-12 10:17:28,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 308 transitions, 782 flow. Second operand has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 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) [2022-07-12 10:17:28,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:28,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 361 [2022-07-12 10:17:28,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:29,653 INFO L129 PetriNetUnfolder]: 778/4728 cut-off events. [2022-07-12 10:17:29,653 INFO L130 PetriNetUnfolder]: For 3219/3219 co-relation queries the response was YES. [2022-07-12 10:17:29,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 4728 events. 778/4728 cut-off events. For 3219/3219 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 42404 event pairs, 642 based on Foata normal form. 4/4466 useless extension candidates. Maximal degree in co-relation 6945. Up to 1032 conditions per place. [2022-07-12 10:17:29,731 INFO L132 encePairwiseOnDemand]: 355/361 looper letters, 34 selfloop transitions, 21 changer transitions 0/332 dead transitions. [2022-07-12 10:17:29,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 332 transitions, 1000 flow [2022-07-12 10:17:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5876 transitions. [2022-07-12 10:17:29,736 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7750956338213956 [2022-07-12 10:17:29,736 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5876 transitions. [2022-07-12 10:17:29,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5876 transitions. [2022-07-12 10:17:29,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:29,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5876 transitions. [2022-07-12 10:17:29,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 279.8095238095238) internal successors, (5876), 21 states have internal predecessors, (5876), 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) [2022-07-12 10:17:29,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 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) [2022-07-12 10:17:29,749 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 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) [2022-07-12 10:17:29,749 INFO L186 Difference]: Start difference. First operand has 316 places, 308 transitions, 782 flow. Second operand 21 states and 5876 transitions. [2022-07-12 10:17:29,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 332 transitions, 1000 flow [2022-07-12 10:17:29,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 332 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:29,754 INFO L242 Difference]: Finished difference. Result has 340 places, 321 transitions, 906 flow [2022-07-12 10:17:29,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=906, PETRI_PLACES=340, PETRI_TRANSITIONS=321} [2022-07-12 10:17:29,755 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 37 predicate places. [2022-07-12 10:17:29,755 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 321 transitions, 906 flow [2022-07-12 10:17:29,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 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) [2022-07-12 10:17:29,756 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:29,757 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:29,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 10:17:29,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash -729596358, now seen corresponding path program 1 times [2022-07-12 10:17:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:29,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558725646] [2022-07-12 10:17:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:29,995 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:30,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:30,034 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:30,035 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:30,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 10:17:30,035 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:30,036 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:30,036 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-12 10:17:30,053 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-12 10:17:30,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 330 places, 394 transitions, 932 flow [2022-07-12 10:17:31,576 INFO L129 PetriNetUnfolder]: 2477/10311 cut-off events. [2022-07-12 10:17:31,576 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-12 10:17:31,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 10311 events. 2477/10311 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 96908 event pairs, 1291 based on Foata normal form. 0/9104 useless extension candidates. Maximal degree in co-relation 6429. Up to 2304 conditions per place. [2022-07-12 10:17:31,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 394 transitions, 932 flow [2022-07-12 10:17:32,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 394 transitions, 932 flow [2022-07-12 10:17:32,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:32,302 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:32,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:32,305 INFO L129 PetriNetUnfolder]: 11/102 cut-off events. [2022-07-12 10:17:32,305 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:32,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:32,305 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] [2022-07-12 10:17:32,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash -152093775, now seen corresponding path program 1 times [2022-07-12 10:17:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:32,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082994080] [2022-07-12 10:17:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:32,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:32,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082994080] [2022-07-12 10:17:32,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082994080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:32,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230746954] [2022-07-12 10:17:32,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:32,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:32,319 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 394 [2022-07-12 10:17:32,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 394 transitions, 932 flow. Second operand has 2 states, 2 states have (on average 311.0) internal successors, (622), 2 states have internal predecessors, (622), 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) [2022-07-12 10:17:32,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:32,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 394 [2022-07-12 10:17:32,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:34,157 INFO L129 PetriNetUnfolder]: 1811/9635 cut-off events. [2022-07-12 10:17:34,157 INFO L130 PetriNetUnfolder]: For 7113/7113 co-relation queries the response was YES. [2022-07-12 10:17:34,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 9635 events. 1811/9635 cut-off events. For 7113/7113 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92976 event pairs, 1291 based on Foata normal form. 14613/23707 useless extension candidates. Maximal degree in co-relation 7058. Up to 2314 conditions per place. [2022-07-12 10:17:34,355 INFO L132 encePairwiseOnDemand]: 329/394 looper letters, 18 selfloop transitions, 0 changer transitions 0/328 dead transitions. [2022-07-12 10:17:34,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 328 transitions, 836 flow [2022-07-12 10:17:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 703 transitions. [2022-07-12 10:17:34,357 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8921319796954315 [2022-07-12 10:17:34,357 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 703 transitions. [2022-07-12 10:17:34,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 703 transitions. [2022-07-12 10:17:34,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:34,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 703 transitions. [2022-07-12 10:17:34,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 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) [2022-07-12 10:17:34,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 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) [2022-07-12 10:17:34,359 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 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) [2022-07-12 10:17:34,359 INFO L186 Difference]: Start difference. First operand has 330 places, 394 transitions, 932 flow. Second operand 2 states and 703 transitions. [2022-07-12 10:17:34,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 328 transitions, 836 flow [2022-07-12 10:17:34,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 328 transitions, 836 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:34,365 INFO L242 Difference]: Finished difference. Result has 330 places, 328 transitions, 800 flow [2022-07-12 10:17:34,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=800, PETRI_PLACES=330, PETRI_TRANSITIONS=328} [2022-07-12 10:17:34,366 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 0 predicate places. [2022-07-12 10:17:34,366 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 328 transitions, 800 flow [2022-07-12 10:17:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 311.0) internal successors, (622), 2 states have internal predecessors, (622), 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) [2022-07-12 10:17:34,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:34,367 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] [2022-07-12 10:17:34,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 10:17:34,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash -39714774, now seen corresponding path program 1 times [2022-07-12 10:17:34,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129265519] [2022-07-12 10:17:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:34,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129265519] [2022-07-12 10:17:34,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129265519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:34,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:34,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600877991] [2022-07-12 10:17:34,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:34,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:34,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:34,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 394 [2022-07-12 10:17:34,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 328 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 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) [2022-07-12 10:17:34,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:34,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 394 [2022-07-12 10:17:34,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:36,255 INFO L129 PetriNetUnfolder]: 1810/9602 cut-off events. [2022-07-12 10:17:36,255 INFO L130 PetriNetUnfolder]: For 7068/7068 co-relation queries the response was YES. [2022-07-12 10:17:36,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14343 conditions, 9602 events. 1810/9602 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92641 event pairs, 1291 based on Foata normal form. 0/9063 useless extension candidates. Maximal degree in co-relation 14331. Up to 2358 conditions per place. [2022-07-12 10:17:36,464 INFO L132 encePairwiseOnDemand]: 391/394 looper letters, 27 selfloop transitions, 2 changer transitions 0/332 dead transitions. [2022-07-12 10:17:36,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 332 transitions, 866 flow [2022-07-12 10:17:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 939 transitions. [2022-07-12 10:17:36,465 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944162436548223 [2022-07-12 10:17:36,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 939 transitions. [2022-07-12 10:17:36,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 939 transitions. [2022-07-12 10:17:36,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:36,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 939 transitions. [2022-07-12 10:17:36,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 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) [2022-07-12 10:17:36,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 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) [2022-07-12 10:17:36,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 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) [2022-07-12 10:17:36,467 INFO L186 Difference]: Start difference. First operand has 330 places, 328 transitions, 800 flow. Second operand 3 states and 939 transitions. [2022-07-12 10:17:36,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 332 transitions, 866 flow [2022-07-12 10:17:36,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 332 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:36,474 INFO L242 Difference]: Finished difference. Result has 333 places, 329 transitions, 812 flow [2022-07-12 10:17:36,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=812, PETRI_PLACES=333, PETRI_TRANSITIONS=329} [2022-07-12 10:17:36,474 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-07-12 10:17:36,474 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 329 transitions, 812 flow [2022-07-12 10:17:36,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 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) [2022-07-12 10:17:36,475 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:36,475 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:17:36,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1388246958, now seen corresponding path program 1 times [2022-07-12 10:17:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136322118] [2022-07-12 10:17:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136322118] [2022-07-12 10:17:36,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136322118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325053444] [2022-07-12 10:17:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:36,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:36,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:36,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:17:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:36,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325053444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:36,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:36,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584049392] [2022-07-12 10:17:36,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:36,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:36,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:36,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:36,678 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 394 [2022-07-12 10:17:36,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 329 transitions, 812 flow. Second operand has 10 states, 10 states have (on average 304.3) internal successors, (3043), 10 states have internal predecessors, (3043), 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) [2022-07-12 10:17:36,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:36,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 394 [2022-07-12 10:17:36,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:38,702 INFO L129 PetriNetUnfolder]: 1808/9536 cut-off events. [2022-07-12 10:17:38,702 INFO L130 PetriNetUnfolder]: For 7071/7071 co-relation queries the response was YES. [2022-07-12 10:17:38,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14304 conditions, 9536 events. 1808/9536 cut-off events. For 7071/7071 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92353 event pairs, 1295 based on Foata normal form. 2/9010 useless extension candidates. Maximal degree in co-relation 14290. Up to 2327 conditions per place. [2022-07-12 10:17:38,900 INFO L132 encePairwiseOnDemand]: 388/394 looper letters, 28 selfloop transitions, 9 changer transitions 0/339 dead transitions. [2022-07-12 10:17:38,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 339 transitions, 908 flow [2022-07-12 10:17:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2757 transitions. [2022-07-12 10:17:38,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7774957698815567 [2022-07-12 10:17:38,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2757 transitions. [2022-07-12 10:17:38,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2757 transitions. [2022-07-12 10:17:38,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:38,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2757 transitions. [2022-07-12 10:17:38,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.3333333333333) internal successors, (2757), 9 states have internal predecessors, (2757), 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) [2022-07-12 10:17:38,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 394.0) internal successors, (3940), 10 states have internal predecessors, (3940), 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) [2022-07-12 10:17:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 394.0) internal successors, (3940), 10 states have internal predecessors, (3940), 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) [2022-07-12 10:17:38,909 INFO L186 Difference]: Start difference. First operand has 333 places, 329 transitions, 812 flow. Second operand 9 states and 2757 transitions. [2022-07-12 10:17:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 339 transitions, 908 flow [2022-07-12 10:17:38,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 339 transitions, 906 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:38,914 INFO L242 Difference]: Finished difference. Result has 343 places, 335 transitions, 860 flow [2022-07-12 10:17:38,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=860, PETRI_PLACES=343, PETRI_TRANSITIONS=335} [2022-07-12 10:17:38,915 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-07-12 10:17:38,915 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 335 transitions, 860 flow [2022-07-12 10:17:38,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 304.3) internal successors, (3043), 10 states have internal predecessors, (3043), 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) [2022-07-12 10:17:38,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:38,916 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:38,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 10:17:39,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:39,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:39,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1444170085, now seen corresponding path program 1 times [2022-07-12 10:17:39,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:39,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881938220] [2022-07-12 10:17:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:39,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:39,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881938220] [2022-07-12 10:17:39,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881938220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:39,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359079454] [2022-07-12 10:17:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:39,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:39,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:39,183 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:39,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:17:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359079454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:39,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:39,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:39,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026569116] [2022-07-12 10:17:39,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:39,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:39,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:39,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:39,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 394 [2022-07-12 10:17:39,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 335 transitions, 860 flow. Second operand has 18 states, 18 states have (on average 304.6111111111111) internal successors, (5483), 18 states have internal predecessors, (5483), 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) [2022-07-12 10:17:39,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:39,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 394 [2022-07-12 10:17:39,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:41,284 INFO L129 PetriNetUnfolder]: 1804/9404 cut-off events. [2022-07-12 10:17:41,284 INFO L130 PetriNetUnfolder]: For 7108/7108 co-relation queries the response was YES. [2022-07-12 10:17:41,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14225 conditions, 9404 events. 1804/9404 cut-off events. For 7108/7108 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 95404 event pairs, 1411 based on Foata normal form. 4/8884 useless extension candidates. Maximal degree in co-relation 14209. Up to 2315 conditions per place. [2022-07-12 10:17:41,487 INFO L132 encePairwiseOnDemand]: 388/394 looper letters, 36 selfloop transitions, 21 changer transitions 0/359 dead transitions. [2022-07-12 10:17:41,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 359 transitions, 1082 flow [2022-07-12 10:17:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6403 transitions. [2022-07-12 10:17:41,493 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7738699540729997 [2022-07-12 10:17:41,493 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6403 transitions. [2022-07-12 10:17:41,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6403 transitions. [2022-07-12 10:17:41,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:41,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6403 transitions. [2022-07-12 10:17:41,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 304.9047619047619) internal successors, (6403), 21 states have internal predecessors, (6403), 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) [2022-07-12 10:17:41,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 394.0) internal successors, (8668), 22 states have internal predecessors, (8668), 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) [2022-07-12 10:17:41,504 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 394.0) internal successors, (8668), 22 states have internal predecessors, (8668), 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) [2022-07-12 10:17:41,504 INFO L186 Difference]: Start difference. First operand has 343 places, 335 transitions, 860 flow. Second operand 21 states and 6403 transitions. [2022-07-12 10:17:41,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 359 transitions, 1082 flow [2022-07-12 10:17:41,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 359 transitions, 1068 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:41,511 INFO L242 Difference]: Finished difference. Result has 367 places, 348 transitions, 984 flow [2022-07-12 10:17:41,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=984, PETRI_PLACES=367, PETRI_TRANSITIONS=348} [2022-07-12 10:17:41,512 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 37 predicate places. [2022-07-12 10:17:41,512 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 348 transitions, 984 flow [2022-07-12 10:17:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 304.6111111111111) internal successors, (5483), 18 states have internal predecessors, (5483), 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) [2022-07-12 10:17:41,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:41,513 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:41,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:41,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 10:17:41,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1457464127, now seen corresponding path program 1 times [2022-07-12 10:17:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:41,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301661122] [2022-07-12 10:17:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:41,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:41,746 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:41,779 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:41,779 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:41,781 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:41,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:41,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-12 10:17:41,782 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:41,783 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:41,783 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-12 10:17:41,809 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-12 10:17:41,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 357 places, 427 transitions, 1024 flow [2022-07-12 10:17:45,983 INFO L129 PetriNetUnfolder]: 5311/20380 cut-off events. [2022-07-12 10:17:45,983 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-12 10:17:46,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 20380 events. 5311/20380 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 216605 event pairs, 3084 based on Foata normal form. 0/18130 useless extension candidates. Maximal degree in co-relation 12668. Up to 5120 conditions per place. [2022-07-12 10:17:46,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 427 transitions, 1024 flow [2022-07-12 10:17:46,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 427 transitions, 1024 flow [2022-07-12 10:17:46,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:46,684 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@7a48680b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558ad659 [2022-07-12 10:17:46,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:46,688 INFO L129 PetriNetUnfolder]: 11/103 cut-off events. [2022-07-12 10:17:46,688 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:46,688 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:46,688 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] [2022-07-12 10:17:46,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash -819932708, now seen corresponding path program 1 times [2022-07-12 10:17:46,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:46,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182059134] [2022-07-12 10:17:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:46,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:46,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182059134] [2022-07-12 10:17:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182059134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:46,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:46,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780522670] [2022-07-12 10:17:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:46,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:46,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 427 [2022-07-12 10:17:46,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 427 transitions, 1024 flow. Second operand has 2 states, 2 states have (on average 336.0) internal successors, (672), 2 states have internal predecessors, (672), 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) [2022-07-12 10:17:46,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:46,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 427 [2022-07-12 10:17:46,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:50,835 INFO L129 PetriNetUnfolder]: 4117/19175 cut-off events. [2022-07-12 10:17:50,835 INFO L130 PetriNetUnfolder]: For 15625/15625 co-relation queries the response was YES. [2022-07-12 10:17:51,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29512 conditions, 19175 events. 4117/19175 cut-off events. For 15625/15625 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 209988 event pairs, 3084 based on Foata normal form. 32080/50199 useless extension candidates. Maximal degree in co-relation 14305. Up to 5131 conditions per place. [2022-07-12 10:17:51,436 INFO L132 encePairwiseOnDemand]: 356/427 looper letters, 20 selfloop transitions, 0 changer transitions 0/355 dead transitions. [2022-07-12 10:17:51,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 355 transitions, 920 flow [2022-07-12 10:17:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 761 transitions. [2022-07-12 10:17:51,438 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8911007025761124 [2022-07-12 10:17:51,438 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 761 transitions. [2022-07-12 10:17:51,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 761 transitions. [2022-07-12 10:17:51,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:51,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 761 transitions. [2022-07-12 10:17:51,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 380.5) internal successors, (761), 2 states have internal predecessors, (761), 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) [2022-07-12 10:17:51,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 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) [2022-07-12 10:17:51,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 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) [2022-07-12 10:17:51,440 INFO L186 Difference]: Start difference. First operand has 357 places, 427 transitions, 1024 flow. Second operand 2 states and 761 transitions. [2022-07-12 10:17:51,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 355 transitions, 920 flow [2022-07-12 10:17:51,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 355 transitions, 920 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:51,447 INFO L242 Difference]: Finished difference. Result has 357 places, 355 transitions, 880 flow [2022-07-12 10:17:51,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=880, PETRI_PLACES=357, PETRI_TRANSITIONS=355} [2022-07-12 10:17:51,447 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-07-12 10:17:51,448 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 355 transitions, 880 flow [2022-07-12 10:17:51,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 336.0) internal successors, (672), 2 states have internal predecessors, (672), 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) [2022-07-12 10:17:51,448 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:51,448 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] [2022-07-12 10:17:51,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-12 10:17:51,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash -801446230, now seen corresponding path program 1 times [2022-07-12 10:17:51,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196707888] [2022-07-12 10:17:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:51,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:51,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:51,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196707888] [2022-07-12 10:17:51,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196707888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:51,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:51,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463253038] [2022-07-12 10:17:51,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:51,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:51,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:51,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 427 [2022-07-12 10:17:51,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 355 transitions, 880 flow. Second operand has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 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) [2022-07-12 10:17:51,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:51,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 427 [2022-07-12 10:17:51,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:55,570 INFO L129 PetriNetUnfolder]: 4116/19142 cut-off events. [2022-07-12 10:17:55,571 INFO L130 PetriNetUnfolder]: For 15570/15570 co-relation queries the response was YES. [2022-07-12 10:17:55,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29534 conditions, 19142 events. 4116/19142 cut-off events. For 15570/15570 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 209637 event pairs, 3084 based on Foata normal form. 0/18088 useless extension candidates. Maximal degree in co-relation 29521. Up to 5180 conditions per place. [2022-07-12 10:17:56,048 INFO L132 encePairwiseOnDemand]: 424/427 looper letters, 29 selfloop transitions, 2 changer transitions 0/359 dead transitions. [2022-07-12 10:17:56,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 359 transitions, 950 flow [2022-07-12 10:17:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2022-07-12 10:17:56,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931303669008587 [2022-07-12 10:17:56,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2022-07-12 10:17:56,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2022-07-12 10:17:56,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:56,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2022-07-12 10:17:56,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 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) [2022-07-12 10:17:56,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 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) [2022-07-12 10:17:56,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 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) [2022-07-12 10:17:56,051 INFO L186 Difference]: Start difference. First operand has 357 places, 355 transitions, 880 flow. Second operand 3 states and 1016 transitions. [2022-07-12 10:17:56,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 359 transitions, 950 flow [2022-07-12 10:17:56,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 359 transitions, 950 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:56,058 INFO L242 Difference]: Finished difference. Result has 360 places, 356 transitions, 892 flow [2022-07-12 10:17:56,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=892, PETRI_PLACES=360, PETRI_TRANSITIONS=356} [2022-07-12 10:17:56,059 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 3 predicate places. [2022-07-12 10:17:56,059 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 356 transitions, 892 flow [2022-07-12 10:17:56,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 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) [2022-07-12 10:17:56,060 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:56,060 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:17:56,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2145767983, now seen corresponding path program 1 times [2022-07-12 10:17:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600971210] [2022-07-12 10:17:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:56,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:56,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600971210] [2022-07-12 10:17:56,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600971210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198790146] [2022-07-12 10:17:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:56,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:56,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:56,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:56,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:17:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:56,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:56,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198790146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:56,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:56,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744279553] [2022-07-12 10:17:56,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:56,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 427 [2022-07-12 10:17:56,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 356 transitions, 892 flow. Second operand has 10 states, 10 states have (on average 329.3) internal successors, (3293), 10 states have internal predecessors, (3293), 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) [2022-07-12 10:17:56,272 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:56,272 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 427 [2022-07-12 10:17:56,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand