./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8 --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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:34:02,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:34:02,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:34:02,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:34:02,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:34:02,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:34:02,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:34:02,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:34:02,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:34:02,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:34:02,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:34:02,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:34:02,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:34:02,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:34:02,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:34:02,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:34:02,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:34:02,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:34:02,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:34:02,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:34:02,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:34:02,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:34:02,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:34:02,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:34:02,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:34:02,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:34:02,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:34:02,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:34:02,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:34:02,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:34:02,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:34:02,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:34:02,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:34:02,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:34:02,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:34:02,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:34:02,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:34:02,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:34:02,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:34:02,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:34:02,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:34:02,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:34:02,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:34:02,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:34:02,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:34:02,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:34:02,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:34:02,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:34:02,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:34:02,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:34:02,758 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:34:02,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:34:02,759 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:34:02,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:34:02,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:34:02,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:34:02,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:34:02,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:34:02,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:34:02,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:34:02,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:34:02,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:34:02,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:34:02,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:34:02,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:34:02,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:34:02,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:34:02,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:34:02,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:34:02,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:34:02,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:34:02,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:34:02,764 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:34:02,764 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:34:02,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:34:02,765 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-11-16 12:34:03,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:34:03,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:34:03,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:34:03,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:34:03,152 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:34:03,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-11-16 12:34:03,226 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/data/ac5806266/34d72205503c47a58298112951fc1322/FLAG614883f09 [2022-11-16 12:34:03,700 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:34:03,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-11-16 12:34:03,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/data/ac5806266/34d72205503c47a58298112951fc1322/FLAG614883f09 [2022-11-16 12:34:04,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/data/ac5806266/34d72205503c47a58298112951fc1322 [2022-11-16 12:34:04,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:34:04,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:34:04,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:34:04,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:34:04,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:34:04,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702e0be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04, skipping insertion in model container [2022-11-16 12:34:04,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:34:04,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:34:04,553 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-11-16 12:34:04,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:34:04,576 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:34:04,638 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-11-16 12:34:04,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:34:04,684 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:34:04,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04 WrapperNode [2022-11-16 12:34:04,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:34:04,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:34:04,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:34:04,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:34:04,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,733 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2022-11-16 12:34:04,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:34:04,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:34:04,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:34:04,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:34:04,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:34:04,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:34:04,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:34:04,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:34:04,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (1/1) ... [2022-11-16 12:34:04,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:34:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:04,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:34:04,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed95ee1b-4400-4aaf-9587-91854c6da80a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:34:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:34:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-16 12:34:04,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-16 12:34:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:34:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:34:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:34:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:34:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:34:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:34:04,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:34:04,863 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:34:05,019 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:34:05,021 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:34:05,307 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:34:05,381 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:34:05,382 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:34:05,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:34:05 BoogieIcfgContainer [2022-11-16 12:34:05,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:34:05,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:34:05,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:34:05,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:34:05,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:34:04" (1/3) ... [2022-11-16 12:34:05,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7840a8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:34:05, skipping insertion in model container [2022-11-16 12:34:05,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:34:04" (2/3) ... [2022-11-16 12:34:05,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7840a8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:34:05, skipping insertion in model container [2022-11-16 12:34:05,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:34:05" (3/3) ... [2022-11-16 12:34:05,394 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-11-16 12:34:05,403 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:34:05,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:34:05,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:34:05,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:34:05,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:34:05,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 199 flow [2022-11-16 12:34:05,579 INFO L130 PetriNetUnfolder]: 10/108 cut-off events. [2022-11-16 12:34:05,579 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:34:05,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 10/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 130 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-11-16 12:34:05,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 97 transitions, 199 flow [2022-11-16 12:34:05,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 97 transitions, 199 flow [2022-11-16 12:34:05,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:05,623 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e3321ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:05,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:34:05,647 INFO L130 PetriNetUnfolder]: 3/51 cut-off events. [2022-11-16 12:34:05,648 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:34:05,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:05,661 INFO L209 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] [2022-11-16 12:34:05,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 748838630, now seen corresponding path program 1 times [2022-11-16 12:34:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:05,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007539938] [2022-11-16 12:34:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:05,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:34:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:05,841 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:34:05,843 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:34:05,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-16 12:34:05,846 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-16 12:34:05,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-16 12:34:05,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:34:05,848 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-16 12:34:05,851 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:34:05,851 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:34:05,894 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:34:05,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 162 transitions, 336 flow [2022-11-16 12:34:05,950 INFO L130 PetriNetUnfolder]: 19/186 cut-off events. [2022-11-16 12:34:05,951 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:34:05,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 19/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 436 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-11-16 12:34:05,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 162 transitions, 336 flow [2022-11-16 12:34:05,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 162 transitions, 336 flow [2022-11-16 12:34:05,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:05,974 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e3321ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:05,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 12:34:06,014 INFO L130 PetriNetUnfolder]: 5/84 cut-off events. [2022-11-16 12:34:06,015 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:34:06,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:06,015 INFO L209 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] [2022-11-16 12:34:06,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-16 12:34:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:06,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1470253689, now seen corresponding path program 1 times [2022-11-16 12:34:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805437325] [2022-11-16 12:34:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:06,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:34:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:06,130 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:34:06,130 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:34:06,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-16 12:34:06,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-16 12:34:06,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-16 12:34:06,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-16 12:34:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:34:06,132 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-16 12:34:06,133 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:34:06,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:34:06,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:34:06,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 475 flow [2022-11-16 12:34:06,327 INFO L130 PetriNetUnfolder]: 28/264 cut-off events. [2022-11-16 12:34:06,327 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:34:06,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 28/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-11-16 12:34:06,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 227 transitions, 475 flow [2022-11-16 12:34:06,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 475 flow [2022-11-16 12:34:06,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:06,348 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e3321ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:06,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 12:34:06,371 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2022-11-16 12:34:06,371 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:34:06,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:06,372 INFO L209 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] [2022-11-16 12:34:06,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-16 12:34:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1815132261, now seen corresponding path program 1 times [2022-11-16 12:34:06,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456907950] [2022-11-16 12:34:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:06,434 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:34:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:06,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:34:06,458 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:34:06,458 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-16 12:34:06,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-16 12:34:06,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-16 12:34:06,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-16 12:34:06,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-16 12:34:06,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:34:06,460 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-16 12:34:06,460 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:34:06,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:34:06,521 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:34:06,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 292 transitions, 616 flow [2022-11-16 12:34:06,627 INFO L130 PetriNetUnfolder]: 37/342 cut-off events. [2022-11-16 12:34:06,628 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:34:06,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 37/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1212 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2022-11-16 12:34:06,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 292 transitions, 616 flow [2022-11-16 12:34:06,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 292 transitions, 616 flow [2022-11-16 12:34:06,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:06,641 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e3321ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:06,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-16 12:34:06,679 INFO L130 PetriNetUnfolder]: 16/195 cut-off events. [2022-11-16 12:34:06,680 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 12:34:06,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:06,680 INFO L209 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] [2022-11-16 12:34:06,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-16 12:34:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1163504962, now seen corresponding path program 1 times [2022-11-16 12:34:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:06,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049486072] [2022-11-16 12:34:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:06,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:06,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049486072] [2022-11-16 12:34:06,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049486072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:06,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:06,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:34:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711860537] [2022-11-16 12:34:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:06,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:34:06,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:34:06,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:34:06,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 292 [2022-11-16 12:34:06,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 616 flow. Second operand has 2 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:06,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:34:06,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 292 [2022-11-16 12:34:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:34:07,623 INFO L130 PetriNetUnfolder]: 324/2573 cut-off events. [2022-11-16 12:34:07,623 INFO L131 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2022-11-16 12:34:07,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 2573 events. 324/2573 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 21527 event pairs, 204 based on Foata normal form. 663/3046 useless extension candidates. Maximal degree in co-relation 988. Up to 325 conditions per place. [2022-11-16 12:34:07,662 INFO L137 encePairwiseOnDemand]: 266/292 looper letters, 12 selfloop transitions, 0 changer transitions 0/233 dead transitions. [2022-11-16 12:34:07,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 522 flow [2022-11-16 12:34:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:34:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:34:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 538 transitions. [2022-11-16 12:34:07,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9212328767123288 [2022-11-16 12:34:07,684 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 538 transitions. [2022-11-16 12:34:07,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 538 transitions. [2022-11-16 12:34:07,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:34:07,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 538 transitions. [2022-11-16 12:34:07,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 269.0) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:07,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:07,706 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:07,708 INFO L175 Difference]: Start difference. First operand has 268 places, 292 transitions, 616 flow. Second operand 2 states and 538 transitions. [2022-11-16 12:34:07,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 522 flow [2022-11-16 12:34:07,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 233 transitions, 510 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-16 12:34:07,724 INFO L231 Difference]: Finished difference. Result has 231 places, 233 transitions, 486 flow [2022-11-16 12:34:07,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=486, PETRI_PLACES=231, PETRI_TRANSITIONS=233} [2022-11-16 12:34:07,734 INFO L288 CegarLoopForPetriNet]: 268 programPoint places, -37 predicate places. [2022-11-16 12:34:07,735 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 233 transitions, 486 flow [2022-11-16 12:34:07,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:07,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:07,736 INFO L209 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] [2022-11-16 12:34:07,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:34:07,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-16 12:34:07,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1647519359, now seen corresponding path program 1 times [2022-11-16 12:34:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:07,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394361390] [2022-11-16 12:34:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:07,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:34:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:07,826 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:34:07,827 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:34:07,827 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-16 12:34:07,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-16 12:34:07,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-16 12:34:07,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-16 12:34:07,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-16 12:34:07,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-16 12:34:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:34:07,829 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 12:34:07,829 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:34:07,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:34:07,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:34:07,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 357 transitions, 759 flow [2022-11-16 12:34:08,072 INFO L130 PetriNetUnfolder]: 46/420 cut-off events. [2022-11-16 12:34:08,073 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:34:08,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 46/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1638 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2022-11-16 12:34:08,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 357 transitions, 759 flow [2022-11-16 12:34:08,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 357 transitions, 759 flow [2022-11-16 12:34:08,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:08,089 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e3321ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:08,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 12:34:08,127 INFO L130 PetriNetUnfolder]: 16/196 cut-off events. [2022-11-16 12:34:08,128 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 12:34:08,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:08,128 INFO L209 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] [2022-11-16 12:34:08,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-16 12:34:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash 204008803, now seen corresponding path program 1 times [2022-11-16 12:34:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:08,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609829648] [2022-11-16 12:34:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:08,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:08,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:08,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609829648] [2022-11-16 12:34:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609829648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:08,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:08,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:34:08,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666262090] [2022-11-16 12:34:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:34:08,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:34:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:34:08,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 357 [2022-11-16 12:34:08,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 357 transitions, 759 flow. Second operand has 2 states, 2 states have (on average 306.5) internal successors, (613), 2 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:08,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:34:08,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 357 [2022-11-16 12:34:08,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:34:10,823 INFO L130 PetriNetUnfolder]: 1215/7973 cut-off events. [2022-11-16 12:34:10,824 INFO L131 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2022-11-16 12:34:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 7973 events. 1215/7973 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 86093 event pairs, 852 based on Foata normal form. 2472/9868 useless extension candidates. Maximal degree in co-relation 3238. Up to 1216 conditions per place. [2022-11-16 12:34:10,978 INFO L137 encePairwiseOnDemand]: 325/357 looper letters, 15 selfloop transitions, 0 changer transitions 0/285 dead transitions. [2022-11-16 12:34:10,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 285 transitions, 645 flow [2022-11-16 12:34:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:34:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:34:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 657 transitions. [2022-11-16 12:34:10,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9201680672268907 [2022-11-16 12:34:10,981 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 657 transitions. [2022-11-16 12:34:10,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 657 transitions. [2022-11-16 12:34:10,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:34:10,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 657 transitions. [2022-11-16 12:34:10,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:10,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:10,986 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:10,986 INFO L175 Difference]: Start difference. First operand has 327 places, 357 transitions, 759 flow. Second operand 2 states and 657 transitions. [2022-11-16 12:34:10,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 285 transitions, 645 flow [2022-11-16 12:34:10,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 285 transitions, 625 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 12:34:10,996 INFO L231 Difference]: Finished difference. Result has 282 places, 285 transitions, 595 flow [2022-11-16 12:34:10,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=595, PETRI_PLACES=282, PETRI_TRANSITIONS=285} [2022-11-16 12:34:10,997 INFO L288 CegarLoopForPetriNet]: 327 programPoint places, -45 predicate places. [2022-11-16 12:34:10,998 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 285 transitions, 595 flow [2022-11-16 12:34:10,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 306.5) internal successors, (613), 2 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:10,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:10,999 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 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] [2022-11-16 12:34:10,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:34:10,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-16 12:34:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1091302108, now seen corresponding path program 1 times [2022-11-16 12:34:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:11,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93127677] [2022-11-16 12:34:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:11,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:11,022 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:34:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:34:11,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:34:11,043 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:34:11,043 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-16 12:34:11,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-16 12:34:11,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-16 12:34:11,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-16 12:34:11,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-16 12:34:11,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-16 12:34:11,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-16 12:34:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:34:11,045 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 12:34:11,046 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:34:11,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-16 12:34:11,128 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:34:11,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 422 transitions, 904 flow [2022-11-16 12:34:11,353 INFO L130 PetriNetUnfolder]: 55/498 cut-off events. [2022-11-16 12:34:11,354 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 12:34:11,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 55/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2054 event pairs, 0 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 439. Up to 14 conditions per place. [2022-11-16 12:34:11,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 422 transitions, 904 flow [2022-11-16 12:34:11,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 422 transitions, 904 flow [2022-11-16 12:34:11,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:34:11,369 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4e3321ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:34:11,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 12:34:11,392 INFO L130 PetriNetUnfolder]: 16/195 cut-off events. [2022-11-16 12:34:11,392 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 12:34:11,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:11,393 INFO L209 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] [2022-11-16 12:34:11,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-16 12:34:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1097477449, now seen corresponding path program 1 times [2022-11-16 12:34:11,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:11,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525905602] [2022-11-16 12:34:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525905602] [2022-11-16 12:34:11,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525905602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:11,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:11,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:34:11,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141808071] [2022-11-16 12:34:11,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:34:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:34:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:34:11,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 422 [2022-11-16 12:34:11,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:11,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:34:11,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 422 [2022-11-16 12:34:11,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:34:19,022 INFO L130 PetriNetUnfolder]: 4374/24659 cut-off events. [2022-11-16 12:34:19,022 INFO L131 PetriNetUnfolder]: For 10297/10297 co-relation queries the response was YES. [2022-11-16 12:34:19,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32868 conditions, 24659 events. 4374/24659 cut-off events. For 10297/10297 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 319394 event pairs, 3282 based on Foata normal form. 8871/31792 useless extension candidates. Maximal degree in co-relation 10447. Up to 4375 conditions per place. [2022-11-16 12:34:19,599 INFO L137 encePairwiseOnDemand]: 384/422 looper letters, 18 selfloop transitions, 0 changer transitions 0/337 dead transitions. [2022-11-16 12:34:19,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 337 transitions, 770 flow [2022-11-16 12:34:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:34:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:34:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 776 transitions. [2022-11-16 12:34:19,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.919431279620853 [2022-11-16 12:34:19,604 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 776 transitions. [2022-11-16 12:34:19,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 776 transitions. [2022-11-16 12:34:19,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:34:19,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 776 transitions. [2022-11-16 12:34:19,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 388.0) internal successors, (776), 2 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:19,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:19,610 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:19,610 INFO L175 Difference]: Start difference. First operand has 386 places, 422 transitions, 904 flow. Second operand 2 states and 776 transitions. [2022-11-16 12:34:19,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 337 transitions, 770 flow [2022-11-16 12:34:19,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 337 transitions, 740 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-16 12:34:19,637 INFO L231 Difference]: Finished difference. Result has 333 places, 337 transitions, 704 flow [2022-11-16 12:34:19,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=704, PETRI_PLACES=333, PETRI_TRANSITIONS=337} [2022-11-16 12:34:19,640 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, -53 predicate places. [2022-11-16 12:34:19,644 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 337 transitions, 704 flow [2022-11-16 12:34:19,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:19,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:34:19,645 INFO L209 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] [2022-11-16 12:34:19,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:34:19,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-16 12:34:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1857617828, now seen corresponding path program 1 times [2022-11-16 12:34:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:19,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427903675] [2022-11-16 12:34:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:20,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427903675] [2022-11-16 12:34:20,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427903675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:34:20,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:34:20,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 12:34:20,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013611018] [2022-11-16 12:34:20,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:34:20,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:34:20,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:34:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:34:20,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 422 [2022-11-16 12:34:20,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 337 transitions, 704 flow. Second operand has 13 states, 13 states have (on average 292.38461538461536) internal successors, (3801), 13 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:20,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:34:20,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 422 [2022-11-16 12:34:20,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand