./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro --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 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- 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-8393723 [2022-11-18 18:49:56,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:49:56,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:49:56,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:49:56,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:49:56,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:49:56,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:49:56,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:49:56,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:49:56,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:49:56,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:49:56,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:49:56,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:49:56,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:49:56,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:49:56,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:49:56,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:49:56,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:49:56,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:49:56,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:49:56,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:49:56,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:49:56,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:49:56,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:49:56,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:49:56,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:49:56,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:49:56,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:49:56,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:49:56,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:49:56,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:49:56,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:49:56,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:49:56,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:49:56,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:49:56,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:49:56,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:49:56,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:49:56,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:49:56,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:49:56,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:49:56,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:49:56,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:49:56,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:49:56,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:49:56,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:49:56,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:49:56,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:49:56,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:49:56,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:49:56,923 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:49:56,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:49:56,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:49:56,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:49:56,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:49:56,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:49:56,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:49:56,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:49:56,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:49:56,925 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:49:56,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:49:56,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:49:56,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:49:56,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:49:56,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:49:56,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:49:56,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:49:56,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:49:56,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:49:56,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:49:56,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:49:56,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:49:56,929 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:49:56,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:49:56,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:49:56,930 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_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2022-11-18 18:49:57,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:49:57,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:49:57,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:49:57,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:49:57,274 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:49:57,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/fib_safe-11.i [2022-11-18 18:49:57,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/data/8daeb16bc/423394b94b7d4c8d999b532a78edcfa8/FLAG0d5a7d5fe [2022-11-18 18:49:57,940 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:49:57,940 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/sv-benchmarks/c/pthread/fib_safe-11.i [2022-11-18 18:49:57,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/data/8daeb16bc/423394b94b7d4c8d999b532a78edcfa8/FLAG0d5a7d5fe [2022-11-18 18:49:58,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/data/8daeb16bc/423394b94b7d4c8d999b532a78edcfa8 [2022-11-18 18:49:58,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:49:58,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:49:58,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:49:58,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:49:58,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:49:58,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f613af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58, skipping insertion in model container [2022-11-18 18:49:58,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:49:58,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:49:58,756 WARN L234 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_4531c4da-40cb-484c-8c74-877af8184b25/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-11-18 18:49:58,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:49:58,795 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:49:58,847 WARN L234 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_4531c4da-40cb-484c-8c74-877af8184b25/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-11-18 18:49:58,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:49:58,896 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:49:58,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58 WrapperNode [2022-11-18 18:49:58,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:49:58,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:49:58,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:49:58,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:49:58,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,957 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-18 18:49:58,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:49:58,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:49:58,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:49:58,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:49:58,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:58,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:59,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:49:59,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:49:59,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:49:59,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:49:59,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (1/1) ... [2022-11-18 18:49:59,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:49:59,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:59,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:49:59,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:49:59,096 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:49:59,096 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:49:59,096 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:49:59,097 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:49:59,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:49:59,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:49:59,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:49:59,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:49:59,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:49:59,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:49:59,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:49:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:49:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:49:59,100 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:49:59,267 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:49:59,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:49:59,515 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:49:59,522 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:49:59,522 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:49:59,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:49:59 BoogieIcfgContainer [2022-11-18 18:49:59,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:49:59,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:49:59,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:49:59,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:49:59,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:49:58" (1/3) ... [2022-11-18 18:49:59,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555b4302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:49:59, skipping insertion in model container [2022-11-18 18:49:59,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:58" (2/3) ... [2022-11-18 18:49:59,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555b4302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:49:59, skipping insertion in model container [2022-11-18 18:49:59,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:49:59" (3/3) ... [2022-11-18 18:49:59,536 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-11-18 18:49:59,545 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:49:59,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:49:59,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:49:59,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:49:59,612 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:49:59,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-18 18:49:59,705 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-18 18:49:59,705 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:49:59,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-18 18:49:59,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-18 18:49:59,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-18 18:49:59,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:49:59,752 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;@4c340508, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:49:59,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 18:49:59,778 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-18 18:49:59,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:49:59,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:59,779 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] [2022-11-18 18:49:59,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1370645073, now seen corresponding path program 1 times [2022-11-18 18:49:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:59,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398275180] [2022-11-18 18:49:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:59,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398275180] [2022-11-18 18:50:00,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398275180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:00,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:00,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:50:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234018317] [2022-11-18 18:50:00,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:50:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:50:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:50:00,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 101 [2022-11-18 18:50:00,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 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) [2022-11-18 18:50:00,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:00,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 101 [2022-11-18 18:50:00,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:00,178 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-18 18:50:00,178 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:50:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 3/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/95 useless extension candidates. Maximal degree in co-relation 66. Up to 3 conditions per place. [2022-11-18 18:50:00,181 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 2 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2022-11-18 18:50:00,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 198 flow [2022-11-18 18:50:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:50:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:50:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-11-18 18:50:00,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9603960396039604 [2022-11-18 18:50:00,203 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-11-18 18:50:00,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-11-18 18:50:00,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:00,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-11-18 18:50:00,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 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) [2022-11-18 18:50:00,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2022-11-18 18:50:00,230 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2022-11-18 18:50:00,232 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 204 flow. Second operand 2 states and 194 transitions. [2022-11-18 18:50:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 198 flow [2022-11-18 18:50:00,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 18:50:00,248 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 192 flow [2022-11-18 18:50:00,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-18 18:50:00,257 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -2 predicate places. [2022-11-18 18:50:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 192 flow [2022-11-18 18:50:00,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 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) [2022-11-18 18:50:00,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:00,259 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] [2022-11-18 18:50:00,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:50:00,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash 865086448, now seen corresponding path program 1 times [2022-11-18 18:50:00,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:00,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673746682] [2022-11-18 18:50:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:00,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:00,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673746682] [2022-11-18 18:50:00,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673746682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:00,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:00,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:50:00,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602780197] [2022-11-18 18:50:00,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:00,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:50:00,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:00,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:50:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:50:00,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 101 [2022-11-18 18:50:00,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-11-18 18:50:00,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:00,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 101 [2022-11-18 18:50:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:00,559 INFO L130 PetriNetUnfolder]: 3/100 cut-off events. [2022-11-18 18:50:00,559 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:50:00,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 100 events. 3/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2022-11-18 18:50:00,561 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 9 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-11-18 18:50:00,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 220 flow [2022-11-18 18:50:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:50:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:50:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-18 18:50:00,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9108910891089109 [2022-11-18 18:50:00,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-18 18:50:00,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-18 18:50:00,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:00,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-18 18:50:00,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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) [2022-11-18 18:50:00,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2022-11-18 18:50:00,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2022-11-18 18:50:00,569 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 192 flow. Second operand 3 states and 276 transitions. [2022-11-18 18:50:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 220 flow [2022-11-18 18:50:00,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:50:00,575 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 204 flow [2022-11-18 18:50:00,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-11-18 18:50:00,576 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-11-18 18:50:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 204 flow [2022-11-18 18:50:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-11-18 18:50:00,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:00,578 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, 1, 1, 1] [2022-11-18 18:50:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:50:00,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1310951925, now seen corresponding path program 1 times [2022-11-18 18:50:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:00,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953621234] [2022-11-18 18:50:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:00,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:00,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953621234] [2022-11-18 18:50:00,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953621234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140220048] [2022-11-18 18:50:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:00,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:00,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:00,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:50:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:50:00,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:01,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140220048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:01,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:01,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:50:01,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319830911] [2022-11-18 18:50:01,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:01,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:50:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:50:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:50:01,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 18:50:01,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 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) [2022-11-18 18:50:01,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:01,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 18:50:01,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:01,268 INFO L130 PetriNetUnfolder]: 3/109 cut-off events. [2022-11-18 18:50:01,268 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:50:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 109 events. 3/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2022-11-18 18:50:01,270 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 10 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-18 18:50:01,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 260 flow [2022-11-18 18:50:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:50:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:50:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 795 transitions. [2022-11-18 18:50:01,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-11-18 18:50:01,280 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 795 transitions. [2022-11-18 18:50:01,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 795 transitions. [2022-11-18 18:50:01,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:01,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 795 transitions. [2022-11-18 18:50:01,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 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) [2022-11-18 18:50:01,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 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) [2022-11-18 18:50:01,286 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 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) [2022-11-18 18:50:01,286 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 204 flow. Second operand 9 states and 795 transitions. [2022-11-18 18:50:01,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 260 flow [2022-11-18 18:50:01,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:50:01,290 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 252 flow [2022-11-18 18:50:01,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2022-11-18 18:50:01,291 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2022-11-18 18:50:01,291 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 252 flow [2022-11-18 18:50:01,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 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) [2022-11-18 18:50:01,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:01,292 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:01,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:01,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:01,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1106224747, now seen corresponding path program 2 times [2022-11-18 18:50:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:01,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034304047] [2022-11-18 18:50:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:01,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:01,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034304047] [2022-11-18 18:50:01,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034304047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512977477] [2022-11-18 18:50:01,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:50:01,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:01,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:01,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:50:01,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:50:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:50:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:02,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:02,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512977477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:02,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:02,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:50:02,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233325024] [2022-11-18 18:50:02,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:02,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:50:02,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:50:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:50:02,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 18:50:02,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 252 flow. Second operand has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 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) [2022-11-18 18:50:02,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:02,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 18:50:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:02,467 INFO L130 PetriNetUnfolder]: 3/137 cut-off events. [2022-11-18 18:50:02,467 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 18:50:02,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 137 events. 3/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 229. Up to 11 conditions per place. [2022-11-18 18:50:02,469 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 14 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2022-11-18 18:50:02,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 418 flow [2022-11-18 18:50:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:50:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:50:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1845 transitions. [2022-11-18 18:50:02,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698727015558698 [2022-11-18 18:50:02,474 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1845 transitions. [2022-11-18 18:50:02,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1845 transitions. [2022-11-18 18:50:02,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:02,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1845 transitions. [2022-11-18 18:50:02,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.85714285714286) internal successors, (1845), 21 states have internal predecessors, (1845), 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) [2022-11-18 18:50:02,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 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) [2022-11-18 18:50:02,485 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 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) [2022-11-18 18:50:02,485 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 252 flow. Second operand 21 states and 1845 transitions. [2022-11-18 18:50:02,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 418 flow [2022-11-18 18:50:02,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:50:02,492 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 376 flow [2022-11-18 18:50:02,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=376, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2022-11-18 18:50:02,494 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 35 predicate places. [2022-11-18 18:50:02,494 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 376 flow [2022-11-18 18:50:02,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 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) [2022-11-18 18:50:02,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:02,497 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:02,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:02,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:02,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1990750421, now seen corresponding path program 3 times [2022-11-18 18:50:02,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:02,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373626616] [2022-11-18 18:50:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:02,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373626616] [2022-11-18 18:50:03,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373626616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194975297] [2022-11-18 18:50:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:03,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:03,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:50:03,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 18:50:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:50:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:03,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194975297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:03,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:03,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:50:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885566455] [2022-11-18 18:50:03,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:50:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:50:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:50:03,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 18:50:03,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 376 flow. Second operand has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 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) [2022-11-18 18:50:03,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:03,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 18:50:03,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:04,492 INFO L130 PetriNetUnfolder]: 3/193 cut-off events. [2022-11-18 18:50:04,492 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-11-18 18:50:04,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 193 events. 3/193 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 443. Up to 27 conditions per place. [2022-11-18 18:50:04,495 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 22 selfloop transitions, 45 changer transitions 0/151 dead transitions. [2022-11-18 18:50:04,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 151 transitions, 798 flow [2022-11-18 18:50:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:50:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:50:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3945 transitions. [2022-11-18 18:50:04,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679867986798679 [2022-11-18 18:50:04,505 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3945 transitions. [2022-11-18 18:50:04,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3945 transitions. [2022-11-18 18:50:04,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:04,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3945 transitions. [2022-11-18 18:50:04,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 87.66666666666667) internal successors, (3945), 45 states have internal predecessors, (3945), 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) [2022-11-18 18:50:04,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 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) [2022-11-18 18:50:04,526 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 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) [2022-11-18 18:50:04,526 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 376 flow. Second operand 45 states and 3945 transitions. [2022-11-18 18:50:04,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 151 transitions, 798 flow [2022-11-18 18:50:04,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 151 transitions, 758 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:50:04,534 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 654 flow [2022-11-18 18:50:04,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=654, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2022-11-18 18:50:04,535 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 82 predicate places. [2022-11-18 18:50:04,535 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 654 flow [2022-11-18 18:50:04,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 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) [2022-11-18 18:50:04,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:04,537 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:04,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:04,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:04,743 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash -522878805, now seen corresponding path program 4 times [2022-11-18 18:50:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:04,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261879602] [2022-11-18 18:50:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:05,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:05,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261879602] [2022-11-18 18:50:05,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261879602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:05,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908049976] [2022-11-18 18:50:05,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:05,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:05,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:05,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:05,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:50:06,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:50:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:06,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:07,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908049976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:07,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:07,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 51 [2022-11-18 18:50:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240523132] [2022-11-18 18:50:07,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 18:50:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 18:50:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 18:50:07,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-18 18:50:07,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 654 flow. Second operand has 51 states, 51 states have (on average 88.03921568627452) internal successors, (4490), 51 states have internal predecessors, (4490), 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) [2022-11-18 18:50:07,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:07,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-18 18:50:07,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:08,641 INFO L130 PetriNetUnfolder]: 3/256 cut-off events. [2022-11-18 18:50:08,642 INFO L131 PetriNetUnfolder]: For 1354/1354 co-relation queries the response was YES. [2022-11-18 18:50:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 256 events. 3/256 cut-off events. For 1354/1354 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 9/262 useless extension candidates. Maximal degree in co-relation 748. Up to 44 conditions per place. [2022-11-18 18:50:08,645 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 31 selfloop transitions, 72 changer transitions 0/187 dead transitions. [2022-11-18 18:50:08,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 187 transitions, 1354 flow [2022-11-18 18:50:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 18:50:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-18 18:50:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 6304 transitions. [2022-11-18 18:50:08,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8668866886688669 [2022-11-18 18:50:08,659 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 6304 transitions. [2022-11-18 18:50:08,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 6304 transitions. [2022-11-18 18:50:08,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:08,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 6304 transitions. [2022-11-18 18:50:08,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 87.55555555555556) internal successors, (6304), 72 states have internal predecessors, (6304), 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) [2022-11-18 18:50:08,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 101.0) internal successors, (7373), 73 states have internal predecessors, (7373), 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) [2022-11-18 18:50:08,693 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 101.0) internal successors, (7373), 73 states have internal predecessors, (7373), 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) [2022-11-18 18:50:08,693 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 654 flow. Second operand 72 states and 6304 transitions. [2022-11-18 18:50:08,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 187 transitions, 1354 flow [2022-11-18 18:50:08,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 187 transitions, 1280 flow, removed 19 selfloop flow, removed 18 redundant places. [2022-11-18 18:50:08,704 INFO L231 Difference]: Finished difference. Result has 244 places, 167 transitions, 1036 flow [2022-11-18 18:50:08,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1036, PETRI_PLACES=244, PETRI_TRANSITIONS=167} [2022-11-18 18:50:08,706 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 145 predicate places. [2022-11-18 18:50:08,706 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 167 transitions, 1036 flow [2022-11-18 18:50:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 88.03921568627452) internal successors, (4490), 51 states have internal predecessors, (4490), 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) [2022-11-18 18:50:08,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:08,717 INFO L209 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:08,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:08,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:08,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1932937072, now seen corresponding path program 5 times [2022-11-18 18:50:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:08,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131673404] [2022-11-18 18:50:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:16,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131673404] [2022-11-18 18:50:16,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131673404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136905029] [2022-11-18 18:50:16,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:50:16,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:16,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:16,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4531c4da-40cb-484c-8c74-877af8184b25/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:50:16,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-18 18:50:16,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 18:50:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 1661 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:27,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:41,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136905029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:41,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:41,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 235 [2022-11-18 18:50:41,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293541449] [2022-11-18 18:50:41,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-18 18:50:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:41,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-18 18:50:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3171, Invalid=51819, Unknown=0, NotChecked=0, Total=54990 [2022-11-18 18:50:41,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-18 18:50:41,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 167 transitions, 1036 flow. Second operand has 235 states, 235 states have (on average 70.15744680851064) internal successors, (16487), 235 states have internal predecessors, (16487), 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) [2022-11-18 18:50:41,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:41,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-18 18:50:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand