./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R --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 4272d82e4e32dc4af1661c2cd99f5af7e9487f266698e80f4586c30581d39fa9 --- 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-38b53e6 [2022-11-25 16:41:28,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:28,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:28,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:28,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:28,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:28,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:28,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:28,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:28,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:28,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:28,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:28,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:28,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:28,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:28,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:28,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:28,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:28,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:28,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:28,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:28,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:28,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:28,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:28,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:28,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:28,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:28,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:28,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:28,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:28,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:28,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:28,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:28,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:28,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:28,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:28,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:28,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:28,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:28,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:28,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:28,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:41:28,960 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:28,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:28,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:28,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:28,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:28,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:28,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:28,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:28,964 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:28,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:28,966 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:41:28,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:28,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:41:28,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:28,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:41:28,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:28,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:41:28,968 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:41:28,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:41:28,968 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:28,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:41:28,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:28,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:28,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:28,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:28,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:28,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:28,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:41:28,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:28,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:28,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:28,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:41:28,972 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:28,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:28,973 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4272d82e4e32dc4af1661c2cd99f5af7e9487f266698e80f4586c30581d39fa9 [2022-11-25 16:41:29,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:41:29,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:41:29,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:41:29,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:41:29,369 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:41:29,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/25_stack.i [2022-11-25 16:41:32,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:41:33,080 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:41:33,081 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/sv-benchmarks/c/pthread-ext/25_stack.i [2022-11-25 16:41:33,096 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/data/475ec991a/34ec07187c2c4acf939e16b3c04b0eea/FLAGe4c385945 [2022-11-25 16:41:33,129 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/data/475ec991a/34ec07187c2c4acf939e16b3c04b0eea [2022-11-25 16:41:33,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:41:33,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:41:33,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:33,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:41:33,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:41:33,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ec76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33, skipping insertion in model container [2022-11-25 16:41:33,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:41:33,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:41:33,739 WARN L237 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_d42a5440-212b-457a-b743-0cac856dee18/sv-benchmarks/c/pthread-ext/25_stack.i[31028,31041] [2022-11-25 16:41:33,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:33,776 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:41:33,837 WARN L237 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_d42a5440-212b-457a-b743-0cac856dee18/sv-benchmarks/c/pthread-ext/25_stack.i[31028,31041] [2022-11-25 16:41:33,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:33,872 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:41:33,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33 WrapperNode [2022-11-25 16:41:33,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:33,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:33,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:41:33,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:41:33,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,922 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 172 [2022-11-25 16:41:33,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:33,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:41:33,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:41:33,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:41:33,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,949 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:41:33,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:41:33,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:41:33,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:41:33,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (1/1) ... [2022-11-25 16:41:33,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:33,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:33,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:41:34,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d42a5440-212b-457a-b743-0cac856dee18/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:41:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:41:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 16:41:34,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 16:41:34,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:41:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:41:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:41:34,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:41:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:41:34,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:41:34,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:41:34,068 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:41:34,204 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:41:34,206 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:41:34,669 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:41:34,846 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:41:34,846 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 16:41:34,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:34 BoogieIcfgContainer [2022-11-25 16:41:34,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:41:34,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:41:34,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:41:34,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:41:34,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:41:33" (1/3) ... [2022-11-25 16:41:34,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac71bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:34, skipping insertion in model container [2022-11-25 16:41:34,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:33" (2/3) ... [2022-11-25 16:41:34,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac71bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:34, skipping insertion in model container [2022-11-25 16:41:34,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:34" (3/3) ... [2022-11-25 16:41:34,869 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack.i [2022-11-25 16:41:34,879 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 16:41:34,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:41:34,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:41:34,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:41:35,031 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:41:35,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-11-25 16:41:35,170 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-11-25 16:41:35,171 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:41:35,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 113 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-11-25 16:41:35,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 106 transitions, 217 flow [2022-11-25 16:41:35,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 106 transitions, 217 flow [2022-11-25 16:41:35,187 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:41:35,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 106 transitions, 217 flow [2022-11-25 16:41:35,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 106 transitions, 217 flow [2022-11-25 16:41:35,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-11-25 16:41:35,238 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-11-25 16:41:35,239 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:41:35,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 113 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-11-25 16:41:35,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904 [2022-11-25 16:41:41,784 INFO L134 LiptonReduction]: Checked pairs total: 1865 [2022-11-25 16:41:41,784 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-25 16:41:41,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:41:41,814 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;@64a6a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:41:41,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 16:41:41,822 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2022-11-25 16:41:41,822 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 16:41:41,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:41:41,824 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 16:41:41,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:41:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1063671646, now seen corresponding path program 1 times [2022-11-25 16:41:41,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:41,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281105124] [2022-11-25 16:41:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:41,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:41:42,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:41:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:41:42,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:41:42,078 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:41:42,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-25 16:41:42,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-25 16:41:42,083 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-25 16:41:42,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:41:42,084 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-25 16:41:42,093 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:41:42,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 16:41:42,169 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:41:42,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-11-25 16:41:42,274 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2022-11-25 16:41:42,279 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:41:42,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-11-25 16:41:42,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 175 transitions, 362 flow [2022-11-25 16:41:42,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 175 transitions, 362 flow [2022-11-25 16:41:42,289 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:41:42,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 175 transitions, 362 flow [2022-11-25 16:41:42,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 175 transitions, 362 flow [2022-11-25 16:41:42,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-11-25 16:41:42,338 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2022-11-25 16:41:42,339 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:41:42,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-11-25 16:41:42,352 INFO L119 LiptonReduction]: Number of co-enabled transitions 13192 [2022-11-25 16:41:50,945 INFO L134 LiptonReduction]: Checked pairs total: 25372 [2022-11-25 16:41:50,945 INFO L136 LiptonReduction]: Total number of compositions: 154 [2022-11-25 16:41:50,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:41:50,951 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;@64a6a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:41:50,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 16:41:50,957 INFO L130 PetriNetUnfolder]: 5/39 cut-off events. [2022-11-25 16:41:50,957 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:41:50,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:41:50,957 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:41:50,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 16:41:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1578469886, now seen corresponding path program 1 times [2022-11-25 16:41:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359331614] [2022-11-25 16:41:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:41:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:41:51,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:41:51,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359331614] [2022-11-25 16:41:51,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359331614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:41:51,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:41:51,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:41:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658598378] [2022-11-25 16:41:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:41:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:41:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:41:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:41:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:41:51,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 329 [2022-11-25 16:41:51,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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) [2022-11-25 16:41:51,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:41:51,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 329 [2022-11-25 16:41:51,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:41:51,668 INFO L130 PetriNetUnfolder]: 1083/1981 cut-off events. [2022-11-25 16:41:51,668 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-25 16:41:51,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3686 conditions, 1981 events. 1083/1981 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12570 event pairs, 341 based on Foata normal form. 30/1585 useless extension candidates. Maximal degree in co-relation 1520. Up to 1225 conditions per place. [2022-11-25 16:41:51,682 INFO L137 encePairwiseOnDemand]: 320/329 looper letters, 68 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2022-11-25 16:41:51,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 89 transitions, 341 flow [2022-11-25 16:41:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:41:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:41:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2022-11-25 16:41:51,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2022-11-25 16:41:51,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2022-11-25 16:41:51,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2022-11-25 16:41:51,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:41:51,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2022-11-25 16:41:51,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:41:51,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2022-11-25 16:41:51,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2022-11-25 16:41:51,719 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 126 flow. Second operand 3 states and 518 transitions. [2022-11-25 16:41:51,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 89 transitions, 341 flow [2022-11-25 16:41:51,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 89 transitions, 339 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 16:41:51,726 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 156 flow [2022-11-25 16:41:51,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2022-11-25 16:41:51,733 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2022-11-25 16:41:51,733 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 156 flow [2022-11-25 16:41:51,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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) [2022-11-25 16:41:51,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:41:51,734 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 16:41:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:41:51,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 16:41:51,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:41:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash 568092513, now seen corresponding path program 1 times [2022-11-25 16:41:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:41:51,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486838586] [2022-11-25 16:41:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:41:51,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:41:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:41:51,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:41:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:41:51,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:41:51,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:41:51,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 16:41:51,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 16:41:51,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-25 16:41:51,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 16:41:51,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:41:51,788 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 16:41:51,788 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:41:51,789 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 16:41:51,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:41:51,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-11-25 16:41:51,913 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2022-11-25 16:41:51,915 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:41:51,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 737 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-11-25 16:41:51,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 244 transitions, 509 flow [2022-11-25 16:41:51,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 244 transitions, 509 flow [2022-11-25 16:41:51,922 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:41:51,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 244 transitions, 509 flow [2022-11-25 16:41:51,923 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 244 transitions, 509 flow [2022-11-25 16:41:51,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-11-25 16:41:52,008 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2022-11-25 16:41:52,009 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 16:41:52,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 737 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-11-25 16:41:52,030 INFO L119 LiptonReduction]: Number of co-enabled transitions 33864 [2022-11-25 16:42:03,361 INFO L134 LiptonReduction]: Checked pairs total: 64851 [2022-11-25 16:42:03,361 INFO L136 LiptonReduction]: Total number of compositions: 210 [2022-11-25 16:42:03,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:03,365 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;@64a6a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:03,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 16:42:03,371 INFO L130 PetriNetUnfolder]: 6/43 cut-off events. [2022-11-25 16:42:03,372 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 16:42:03,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:03,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:03,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 16:42:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1461503341, now seen corresponding path program 1 times [2022-11-25 16:42:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567592063] [2022-11-25 16:42:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:03,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:03,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567592063] [2022-11-25 16:42:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567592063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:03,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404584106] [2022-11-25 16:42:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:03,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 454 [2022-11-25 16:42:03,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 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) [2022-11-25 16:42:03,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:03,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 454 [2022-11-25 16:42:03,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:10,821 INFO L130 PetriNetUnfolder]: 31140/46744 cut-off events. [2022-11-25 16:42:10,823 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2022-11-25 16:42:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89511 conditions, 46744 events. 31140/46744 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 2349. Compared 361076 event pairs, 6239 based on Foata normal form. 786/37085 useless extension candidates. Maximal degree in co-relation 35912. Up to 23189 conditions per place. [2022-11-25 16:42:11,238 INFO L137 encePairwiseOnDemand]: 438/454 looper letters, 170 selfloop transitions, 15 changer transitions 0/207 dead transitions. [2022-11-25 16:42:11,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 207 transitions, 836 flow [2022-11-25 16:42:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1185 transitions. [2022-11-25 16:42:11,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5220264317180616 [2022-11-25 16:42:11,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1185 transitions. [2022-11-25 16:42:11,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1185 transitions. [2022-11-25 16:42:11,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:11,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1185 transitions. [2022-11-25 16:42:11,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 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) [2022-11-25 16:42:11,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 454.0) internal successors, (2724), 6 states have internal predecessors, (2724), 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) [2022-11-25 16:42:11,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 454.0) internal successors, (2724), 6 states have internal predecessors, (2724), 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) [2022-11-25 16:42:11,261 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 187 flow. Second operand 5 states and 1185 transitions. [2022-11-25 16:42:11,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 207 transitions, 836 flow [2022-11-25 16:42:11,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 207 transitions, 824 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-25 16:42:11,271 INFO L231 Difference]: Finished difference. Result has 82 places, 92 transitions, 295 flow [2022-11-25 16:42:11,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=82, PETRI_TRANSITIONS=92} [2022-11-25 16:42:11,273 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2022-11-25 16:42:11,274 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 92 transitions, 295 flow [2022-11-25 16:42:11,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 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) [2022-11-25 16:42:11,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:11,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:42:11,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 16:42:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash 492550951, now seen corresponding path program 1 times [2022-11-25 16:42:11,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:11,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204928033] [2022-11-25 16:42:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:11,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:11,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204928033] [2022-11-25 16:42:11,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204928033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:11,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:11,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651010013] [2022-11-25 16:42:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:11,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:11,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 454 [2022-11-25 16:42:11,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 92 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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) [2022-11-25 16:42:11,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:11,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 454 [2022-11-25 16:42:11,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:19,838 INFO L130 PetriNetUnfolder]: 37563/58023 cut-off events. [2022-11-25 16:42:19,838 INFO L131 PetriNetUnfolder]: For 19700/20151 co-relation queries the response was YES. [2022-11-25 16:42:20,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123927 conditions, 58023 events. 37563/58023 cut-off events. For 19700/20151 co-relation queries the response was YES. Maximal size of possible extension queue 3209. Compared 483758 event pairs, 7850 based on Foata normal form. 1275/49004 useless extension candidates. Maximal degree in co-relation 42938. Up to 42084 conditions per place. [2022-11-25 16:42:20,309 INFO L137 encePairwiseOnDemand]: 447/454 looper letters, 96 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2022-11-25 16:42:20,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 635 flow [2022-11-25 16:42:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:42:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2022-11-25 16:42:20,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5036710719530103 [2022-11-25 16:42:20,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2022-11-25 16:42:20,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2022-11-25 16:42:20,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:20,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2022-11-25 16:42:20,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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) [2022-11-25 16:42:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 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) [2022-11-25 16:42:20,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 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) [2022-11-25 16:42:20,320 INFO L175 Difference]: Start difference. First operand has 82 places, 92 transitions, 295 flow. Second operand 3 states and 686 transitions. [2022-11-25 16:42:20,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 635 flow [2022-11-25 16:42:20,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 635 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 16:42:20,333 INFO L231 Difference]: Finished difference. Result has 85 places, 95 transitions, 325 flow [2022-11-25 16:42:20,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=85, PETRI_TRANSITIONS=95} [2022-11-25 16:42:20,336 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 10 predicate places. [2022-11-25 16:42:20,336 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 95 transitions, 325 flow [2022-11-25 16:42:20,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 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) [2022-11-25 16:42:20,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:20,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:42:20,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 16:42:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 603216428, now seen corresponding path program 1 times [2022-11-25 16:42:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:20,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661241547] [2022-11-25 16:42:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:20,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661241547] [2022-11-25 16:42:20,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661241547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:20,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:20,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:42:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238835334] [2022-11-25 16:42:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:20,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:20,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:20,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 454 [2022-11-25 16:42:20,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 95 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 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) [2022-11-25 16:42:20,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:20,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 454 [2022-11-25 16:42:20,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:31,584 INFO L130 PetriNetUnfolder]: 54431/82915 cut-off events. [2022-11-25 16:42:31,584 INFO L131 PetriNetUnfolder]: For 27842/28293 co-relation queries the response was YES. [2022-11-25 16:42:31,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182236 conditions, 82915 events. 54431/82915 cut-off events. For 27842/28293 co-relation queries the response was YES. Maximal size of possible extension queue 3799. Compared 694537 event pairs, 11788 based on Foata normal form. 359/68056 useless extension candidates. Maximal degree in co-relation 84412. Up to 45557 conditions per place. [2022-11-25 16:42:32,456 INFO L137 encePairwiseOnDemand]: 444/454 looper letters, 201 selfloop transitions, 11 changer transitions 0/240 dead transitions. [2022-11-25 16:42:32,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 240 transitions, 1219 flow [2022-11-25 16:42:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:42:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:42:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1345 transitions. [2022-11-25 16:42:32,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49375917767988253 [2022-11-25 16:42:32,461 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1345 transitions. [2022-11-25 16:42:32,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1345 transitions. [2022-11-25 16:42:32,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:32,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1345 transitions. [2022-11-25 16:42:32,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.16666666666666) internal successors, (1345), 6 states have internal predecessors, (1345), 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) [2022-11-25 16:42:32,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 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) [2022-11-25 16:42:32,472 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 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) [2022-11-25 16:42:32,473 INFO L175 Difference]: Start difference. First operand has 85 places, 95 transitions, 325 flow. Second operand 6 states and 1345 transitions. [2022-11-25 16:42:32,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 240 transitions, 1219 flow [2022-11-25 16:42:32,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 240 transitions, 1213 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:32,493 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 386 flow [2022-11-25 16:42:32,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2022-11-25 16:42:32,496 INFO L288 CegarLoopForPetriNet]: 75 programPoint places, 17 predicate places. [2022-11-25 16:42:32,497 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 386 flow [2022-11-25 16:42:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 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) [2022-11-25 16:42:32,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:32,498 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 16:42:32,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:42:32,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-25 16:42:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1558732418, now seen corresponding path program 1 times [2022-11-25 16:42:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:32,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440830143] [2022-11-25 16:42:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:42:32,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 16:42:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 16:42:32,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 16:42:32,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 16:42:32,552 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 16:42:32,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 16:42:32,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-25 16:42:32,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 16:42:32,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 16:42:32,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:42:32,553 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 16:42:32,555 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 16:42:32,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 16:42:32,623 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 16:42:32,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-11-25 16:42:32,717 INFO L130 PetriNetUnfolder]: 29/363 cut-off events. [2022-11-25 16:42:32,717 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 16:42:32,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1160 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-11-25 16:42:32,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 313 transitions, 658 flow [2022-11-25 16:42:32,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 313 transitions, 658 flow [2022-11-25 16:42:32,732 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:42:32,733 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 313 transitions, 658 flow [2022-11-25 16:42:32,733 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 313 transitions, 658 flow [2022-11-25 16:42:32,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-11-25 16:42:32,800 INFO L130 PetriNetUnfolder]: 29/363 cut-off events. [2022-11-25 16:42:32,801 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 16:42:32,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1160 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-11-25 16:42:32,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 63920 [2022-11-25 16:42:47,235 INFO L134 LiptonReduction]: Checked pairs total: 127298 [2022-11-25 16:42:47,235 INFO L136 LiptonReduction]: Total number of compositions: 267 [2022-11-25 16:42:47,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:47,237 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;@64a6a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:47,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 16:42:47,244 INFO L130 PetriNetUnfolder]: 6/44 cut-off events. [2022-11-25 16:42:47,244 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 16:42:47,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:47,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:47,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-25 16:42:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash 96161377, now seen corresponding path program 1 times [2022-11-25 16:42:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:47,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305921387] [2022-11-25 16:42:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:47,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:47,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:47,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305921387] [2022-11-25 16:42:47,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305921387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:47,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:47,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:47,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395120899] [2022-11-25 16:42:47,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:47,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:47,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:47,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 580 [2022-11-25 16:42:47,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 109 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 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) [2022-11-25 16:42:47,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:47,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 580 [2022-11-25 16:42:47,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand