./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/sssc12_variant.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-lit/sssc12_variant.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 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:12:36,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:12:36,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:12:36,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:12:36,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:12:36,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:12:36,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:12:36,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:12:36,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:12:36,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:12:36,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:12:36,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:12:36,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:12:36,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:12:36,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:12:36,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:12:36,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:12:36,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:12:36,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:12:36,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:12:36,846 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:12:36,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:12:36,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:12:36,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:12:36,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:12:36,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:12:36,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:12:36,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:12:36,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:12:36,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:12:36,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:12:36,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:12:36,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:12:36,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:12:36,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:12:36,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:12:36,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:12:36,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:12:36,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:12:36,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:12:36,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:12:36,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:12:36,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:12:36,888 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:12:36,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:12:36,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:12:36,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:12:36,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:12:36,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:12:36,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:12:36,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:12:36,891 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:12:36,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:12:36,892 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:12:36,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:12:36,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:12:36,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:12:36,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:12:36,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:12:36,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:12:36,893 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:12:36,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:12:36,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:12:36,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:12:36,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:12:36,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:12:36,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:12:36,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:12:36,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:12:36,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:12:36,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:12:36,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:12:36,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:12:36,896 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:12:36,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:12:36,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:12:36,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be74b3f1207f4387a275e1f4e0e57734d5f1b215282bd8d49efde8c6948d207 [2022-07-19 21:12:37,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:12:37,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:12:37,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:12:37,115 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:12:37,128 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:12:37,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-07-19 21:12:37,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b2cbc4bc/dafbe967d721449e8ce594eb4c48778b/FLAGf71af739e [2022-07-19 21:12:37,588 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:12:37,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i [2022-07-19 21:12:37,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b2cbc4bc/dafbe967d721449e8ce594eb4c48778b/FLAGf71af739e [2022-07-19 21:12:37,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b2cbc4bc/dafbe967d721449e8ce594eb4c48778b [2022-07-19 21:12:37,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:12:37,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:12:37,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:12:37,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:12:37,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:12:37,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:37" (1/1) ... [2022-07-19 21:12:37,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3a565f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:37, skipping insertion in model container [2022-07-19 21:12:37,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:37" (1/1) ... [2022-07-19 21:12:37,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:12:37,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:12:37,999 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-07-19 21:12:38,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:12:38,026 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:12:38,066 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/sssc12_variant.i[46865,46878] [2022-07-19 21:12:38,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:12:38,111 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:12:38,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38 WrapperNode [2022-07-19 21:12:38,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:12:38,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:12:38,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:12:38,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:12:38,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,169 INFO L137 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2022-07-19 21:12:38,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:12:38,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:12:38,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:12:38,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:12:38,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:12:38,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:12:38,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:12:38,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:12:38,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (1/1) ... [2022-07-19 21:12:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:12:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:12:38,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:12:38,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:12:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:12:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-07-19 21:12:38,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:12:38,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:12:38,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:12:38,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:12:38,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:12:38,273 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:12:38,369 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:12:38,373 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:12:38,507 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:12:38,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:12:38,530 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:12:38,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:38 BoogieIcfgContainer [2022-07-19 21:12:38,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:12:38,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:12:38,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:12:38,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:12:38,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:12:37" (1/3) ... [2022-07-19 21:12:38,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c2c2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:38, skipping insertion in model container [2022-07-19 21:12:38,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:38" (2/3) ... [2022-07-19 21:12:38,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c2c2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:38, skipping insertion in model container [2022-07-19 21:12:38,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:38" (3/3) ... [2022-07-19 21:12:38,540 INFO L111 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2022-07-19 21:12:38,544 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:12:38,550 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:12:38,550 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:12:38,550 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:12:38,615 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:38,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 181 flow [2022-07-19 21:12:38,692 INFO L129 PetriNetUnfolder]: 7/100 cut-off events. [2022-07-19 21:12:38,693 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:12:38,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 100 events. 7/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2022-07-19 21:12:38,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 181 flow [2022-07-19 21:12:38,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 88 transitions, 181 flow [2022-07-19 21:12:38,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:38,732 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@2892e9fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69af7686 [2022-07-19 21:12:38,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:12:38,751 INFO L129 PetriNetUnfolder]: 3/67 cut-off events. [2022-07-19 21:12:38,751 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:12:38,751 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:38,752 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, 1, 1] [2022-07-19 21:12:38,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:12:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash 178627719, now seen corresponding path program 1 times [2022-07-19 21:12:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:38,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014774358] [2022-07-19 21:12:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:38,899 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:12:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:38,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:12:38,954 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:12:38,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:12:38,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:12:38,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:12:38,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:12:38,957 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:12:38,964 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:12:38,965 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:12:39,004 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:39,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 120 places, 125 transitions, 262 flow [2022-07-19 21:12:39,036 INFO L129 PetriNetUnfolder]: 12/151 cut-off events. [2022-07-19 21:12:39,036 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:12:39,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 12/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 268 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-07-19 21:12:39,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 125 transitions, 262 flow [2022-07-19 21:12:39,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 125 transitions, 262 flow [2022-07-19 21:12:39,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:39,044 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@2892e9fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69af7686 [2022-07-19 21:12:39,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:12:39,062 INFO L129 PetriNetUnfolder]: 6/103 cut-off events. [2022-07-19 21:12:39,067 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:12:39,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:39,069 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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, 1] [2022-07-19 21:12:39,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:12:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash 485553204, now seen corresponding path program 1 times [2022-07-19 21:12:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125263912] [2022-07-19 21:12:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:39,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,104 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:12:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,133 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:12:39,137 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:12:39,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:12:39,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:12:39,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:12:39,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:12:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:12:39,139 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:12:39,142 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:12:39,145 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:12:39,166 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:39,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 162 transitions, 345 flow [2022-07-19 21:12:39,214 INFO L129 PetriNetUnfolder]: 17/202 cut-off events. [2022-07-19 21:12:39,215 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:12:39,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 202 events. 17/202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 485 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-07-19 21:12:39,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 162 transitions, 345 flow [2022-07-19 21:12:39,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 162 transitions, 345 flow [2022-07-19 21:12:39,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:39,225 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@2892e9fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69af7686 [2022-07-19 21:12:39,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:12:39,240 INFO L129 PetriNetUnfolder]: 9/143 cut-off events. [2022-07-19 21:12:39,241 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:12:39,241 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:39,242 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-07-19 21:12:39,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:12:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1781292582, now seen corresponding path program 1 times [2022-07-19 21:12:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085548531] [2022-07-19 21:12:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:39,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,284 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:12:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:12:39,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:12:39,315 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:12:39,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:12:39,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:12:39,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:12:39,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:12:39,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:12:39,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:12:39,316 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:12:39,317 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:12:39,317 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:12:39,353 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:12:39,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 430 flow [2022-07-19 21:12:39,388 INFO L129 PetriNetUnfolder]: 22/253 cut-off events. [2022-07-19 21:12:39,388 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:12:39,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 253 events. 22/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 696 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 210. Up to 10 conditions per place. [2022-07-19 21:12:39,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 199 transitions, 430 flow [2022-07-19 21:12:39,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 199 transitions, 430 flow [2022-07-19 21:12:39,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:12:39,397 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@2892e9fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69af7686 [2022-07-19 21:12:39,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:12:39,413 INFO L129 PetriNetUnfolder]: 9/151 cut-off events. [2022-07-19 21:12:39,414 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:12:39,414 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:39,414 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:39,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:12:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:39,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1586586166, now seen corresponding path program 1 times [2022-07-19 21:12:39,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:39,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721200467] [2022-07-19 21:12:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:39,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:12:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:12:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:12:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721200467] [2022-07-19 21:12:39,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721200467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:12:39,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:12:39,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:12:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491368487] [2022-07-19 21:12:39,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:12:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:12:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:12:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:12:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:12:39,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 199 [2022-07-19 21:12:39,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 199 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:39,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:12:39,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 199 [2022-07-19 21:12:39,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:12:40,603 INFO L129 PetriNetUnfolder]: 1812/7147 cut-off events. [2022-07-19 21:12:40,604 INFO L130 PetriNetUnfolder]: For 1954/1954 co-relation queries the response was YES. [2022-07-19 21:12:40,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10386 conditions, 7147 events. 1812/7147 cut-off events. For 1954/1954 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 75757 event pairs, 992 based on Foata normal form. 1834/8290 useless extension candidates. Maximal degree in co-relation 6880. Up to 1573 conditions per place. [2022-07-19 21:12:40,704 INFO L132 encePairwiseOnDemand]: 184/199 looper letters, 42 selfloop transitions, 3 changer transitions 1/198 dead transitions. [2022-07-19 21:12:40,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 198 transitions, 560 flow [2022-07-19 21:12:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:12:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:12:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2022-07-19 21:12:40,722 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8919597989949749 [2022-07-19 21:12:40,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2022-07-19 21:12:40,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2022-07-19 21:12:40,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:12:40,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2022-07-19 21:12:40,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,744 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,746 INFO L186 Difference]: Start difference. First operand has 190 places, 199 transitions, 430 flow. Second operand 4 states and 710 transitions. [2022-07-19 21:12:40,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 198 transitions, 560 flow [2022-07-19 21:12:40,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 198 transitions, 536 flow, removed 12 selfloop flow, removed 0 redundant places. [2022-07-19 21:12:40,755 INFO L242 Difference]: Finished difference. Result has 183 places, 177 transitions, 384 flow [2022-07-19 21:12:40,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=183, PETRI_TRANSITIONS=177} [2022-07-19 21:12:40,759 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, -7 predicate places. [2022-07-19 21:12:40,759 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 177 transitions, 384 flow [2022-07-19 21:12:40,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:12:40,760 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:12:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:12:40,761 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:12:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:12:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash -893966395, now seen corresponding path program 1 times [2022-07-19 21:12:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:12:40,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85437044] [2022-07-19 21:12:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:12:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:12:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:12:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:12:40,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:12:40,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85437044] [2022-07-19 21:12:40,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85437044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:12:40,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:12:40,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:12:40,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415902702] [2022-07-19 21:12:40,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:12:40,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:12:40,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:12:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:12:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:12:40,893 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 199 [2022-07-19 21:12:40,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 177 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:12:40,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:12:40,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 199 [2022-07-19 21:12:40,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:00,451 INFO L129 PetriNetUnfolder]: 93033/198443 cut-off events. [2022-07-19 21:13:00,451 INFO L130 PetriNetUnfolder]: For 7802/7802 co-relation queries the response was YES. [2022-07-19 21:13:01,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329031 conditions, 198443 events. 93033/198443 cut-off events. For 7802/7802 co-relation queries the response was YES. Maximal size of possible extension queue 5800. Compared 2554414 event pairs, 24595 based on Foata normal form. 0/183178 useless extension candidates. Maximal degree in co-relation 280393. Up to 38577 conditions per place. [2022-07-19 21:13:02,831 INFO L132 encePairwiseOnDemand]: 186/199 looper letters, 273 selfloop transitions, 48 changer transitions 0/457 dead transitions. [2022-07-19 21:13:02,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 457 transitions, 1780 flow [2022-07-19 21:13:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:13:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:13:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2468 transitions. [2022-07-19 21:13:02,837 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8268006700167504 [2022-07-19 21:13:02,837 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2468 transitions. [2022-07-19 21:13:02,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2468 transitions. [2022-07-19 21:13:02,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:02,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2468 transitions. [2022-07-19 21:13:02,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.53333333333333) internal successors, (2468), 15 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:02,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 199.0) internal successors, (3184), 16 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:02,847 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 199.0) internal successors, (3184), 16 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:02,847 INFO L186 Difference]: Start difference. First operand has 183 places, 177 transitions, 384 flow. Second operand 15 states and 2468 transitions. [2022-07-19 21:13:02,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 457 transitions, 1780 flow [2022-07-19 21:13:02,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 457 transitions, 1774 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:13:02,872 INFO L242 Difference]: Finished difference. Result has 203 places, 227 transitions, 733 flow [2022-07-19 21:13:02,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=733, PETRI_PLACES=203, PETRI_TRANSITIONS=227} [2022-07-19 21:13:02,874 INFO L279 CegarLoopForPetriNet]: 190 programPoint places, 13 predicate places. [2022-07-19 21:13:02,874 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 227 transitions, 733 flow [2022-07-19 21:13:02,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:02,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:02,875 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1] [2022-07-19 21:13:02,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:13:02,880 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1090530460, now seen corresponding path program 1 times [2022-07-19 21:13:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041578905] [2022-07-19 21:13:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:13:02,920 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:13:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:13:02,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:13:02,952 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:13:02,952 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:13:02,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:13:02,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:13:02,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:13:02,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:13:02,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:13:02,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:13:02,953 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:13:02,954 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:13:02,954 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:13:02,991 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:13:02,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 225 places, 236 transitions, 517 flow [2022-07-19 21:13:03,031 INFO L129 PetriNetUnfolder]: 27/304 cut-off events. [2022-07-19 21:13:03,032 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:13:03,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 304 events. 27/304 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 913 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 266. Up to 12 conditions per place. [2022-07-19 21:13:03,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 236 transitions, 517 flow [2022-07-19 21:13:03,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 236 transitions, 517 flow [2022-07-19 21:13:03,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:03,042 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@2892e9fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69af7686 [2022-07-19 21:13:03,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:13:03,053 INFO L129 PetriNetUnfolder]: 10/159 cut-off events. [2022-07-19 21:13:03,053 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:13:03,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:03,053 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:03,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:13:03,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:03,054 INFO L85 PathProgramCache]: Analyzing trace with hash -341254586, now seen corresponding path program 1 times [2022-07-19 21:13:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:03,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333773079] [2022-07-19 21:13:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:03,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:13:03,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333773079] [2022-07-19 21:13:03,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333773079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:03,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:03,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:13:03,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697124084] [2022-07-19 21:13:03,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:03,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:13:03,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:03,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:13:03,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:13:03,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 236 [2022-07-19 21:13:03,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 236 transitions, 517 flow. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:03,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:03,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 236 [2022-07-19 21:13:03,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:06,558 INFO L129 PetriNetUnfolder]: 7800/32460 cut-off events. [2022-07-19 21:13:06,559 INFO L130 PetriNetUnfolder]: For 9233/9233 co-relation queries the response was YES. [2022-07-19 21:13:06,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 32460 events. 7800/32460 cut-off events. For 9233/9233 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 444402 event pairs, 5308 based on Foata normal form. 6928/36162 useless extension candidates. Maximal degree in co-relation 15624. Up to 5846 conditions per place. [2022-07-19 21:13:06,984 INFO L132 encePairwiseOnDemand]: 219/236 looper letters, 51 selfloop transitions, 3 changer transitions 1/238 dead transitions. [2022-07-19 21:13:06,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 238 transitions, 693 flow [2022-07-19 21:13:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:13:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:13:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2022-07-19 21:13:06,987 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.899364406779661 [2022-07-19 21:13:06,987 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2022-07-19 21:13:06,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2022-07-19 21:13:06,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:06,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2022-07-19 21:13:06,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:06,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 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) [2022-07-19 21:13:06,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 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) [2022-07-19 21:13:06,993 INFO L186 Difference]: Start difference. First operand has 225 places, 236 transitions, 517 flow. Second operand 4 states and 849 transitions. [2022-07-19 21:13:06,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 238 transitions, 693 flow [2022-07-19 21:13:07,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 238 transitions, 649 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:07,004 INFO L242 Difference]: Finished difference. Result has 217 places, 211 transitions, 457 flow [2022-07-19 21:13:07,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-07-19 21:13:07,005 INFO L279 CegarLoopForPetriNet]: 225 programPoint places, -8 predicate places. [2022-07-19 21:13:07,006 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 457 flow [2022-07-19 21:13:07,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:07,006 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:07,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:13:07,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:13:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash -894821271, now seen corresponding path program 1 times [2022-07-19 21:13:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:07,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019608188] [2022-07-19 21:13:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:13:07,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:07,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019608188] [2022-07-19 21:13:07,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019608188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:07,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:07,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:13:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456135460] [2022-07-19 21:13:07,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:07,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:13:07,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:07,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:13:07,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:13:07,073 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 236 [2022-07-19 21:13:07,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:13:07,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:07,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 236 [2022-07-19 21:13:07,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand