./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:17:23,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:17:23,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:17:23,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:17:23,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:17:23,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:17:23,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:17:23,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:17:23,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:17:23,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:17:23,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:17:23,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:17:23,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:17:23,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:17:23,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:17:23,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:17:23,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:17:23,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:17:23,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:17:23,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:17:23,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:17:23,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:17:23,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:17:23,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:17:23,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:17:23,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:17:23,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:17:23,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:17:23,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:17:23,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:17:23,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:17:23,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:17:23,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:17:23,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:17:23,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:17:23,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:17:23,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:17:23,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:17:23,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:17:23,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:17:23,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:17:23,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:17:23,970 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:17:23,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:17:23,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:17:23,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:17:23,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:17:23,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:17:23,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:17:23,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:17:23,973 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:17:23,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:17:23,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:17:23,974 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:17:23,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:17:23,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:17:23,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:17:23,975 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:17:23,975 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:17:23,976 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:17:23,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:17:23,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:17:23,976 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:17:23,977 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:17:23,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:17:23,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:17:23,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:17:23,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:17:23,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:17:23,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:17:23,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:17:23,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:17:23,979 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:17:23,979 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:17:23,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:17:23,980 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-25 17:17:24,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:17:24,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:17:24,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:17:24,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:17:24,312 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:17:24,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 17:17:27,560 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:17:27,812 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:17:27,813 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 17:17:27,821 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data/7aeb690d8/fee472179f2e450caefc3860ea45652e/FLAG1a3d07e38 [2022-11-25 17:17:27,839 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data/7aeb690d8/fee472179f2e450caefc3860ea45652e [2022-11-25 17:17:27,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:17:27,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:17:27,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:17:27,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:17:27,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:17:27,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:17:27" (1/1) ... [2022-11-25 17:17:27,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50831b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:27, skipping insertion in model container [2022-11-25 17:17:27,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:17:27" (1/1) ... [2022-11-25 17:17:27,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:17:27,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:17:28,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:28,049 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:28,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:28,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:28,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:28,057 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:28,079 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 17:17:28,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:17:28,101 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 17:17:28,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24f6b37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:28, skipping insertion in model container [2022-11-25 17:17:28,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:17:28,102 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:17:28,104 INFO L158 Benchmark]: Toolchain (without parser) took 256.84ms. Allocated memory is still 130.0MB. Free memory was 72.8MB in the beginning and 62.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:17:28,105 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory was 60.3MB in the beginning and 60.1MB in the end (delta: 237.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:17:28,106 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.33ms. Allocated memory is still 130.0MB. Free memory was 72.8MB in the beginning and 62.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:17:28,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory was 60.3MB in the beginning and 60.1MB in the end (delta: 237.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.33ms. Allocated memory is still 130.0MB. Free memory was 72.8MB in the beginning and 62.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:17:30,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:17:30,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:17:30,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:17:30,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:17:30,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:17:30,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:17:30,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:17:30,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:17:30,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:17:30,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:17:30,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:17:30,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:17:30,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:17:30,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:17:30,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:17:30,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:17:30,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:17:30,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:17:30,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:17:30,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:17:30,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:17:30,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:17:30,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:17:30,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:17:30,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:17:30,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:17:30,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:17:30,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:17:30,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:17:30,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:17:30,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:17:30,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:17:30,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:17:30,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:17:30,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:17:30,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:17:30,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:17:30,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:17:30,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:17:30,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:17:30,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:17:30,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:17:30,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:17:30,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:17:30,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:17:30,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:17:30,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:17:30,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:17:30,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:17:30,469 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:17:30,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:17:30,469 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:17:30,470 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:17:30,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:17:30,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:17:30,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:17:30,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:17:30,471 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:17:30,471 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:17:30,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:17:30,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:17:30,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:17:30,472 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:17:30,472 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:17:30,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:17:30,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:17:30,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:17:30,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:17:30,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:17:30,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:17:30,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:17:30,474 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:17:30,475 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:17:30,475 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:17:30,475 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:17:30,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:17:30,476 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:17:30,476 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-25 17:17:30,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:17:30,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:17:30,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:17:30,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:17:30,920 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:17:30,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 17:17:33,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:17:34,187 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:17:34,188 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 17:17:34,194 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data/de5d843f3/fad2f31d82954cff8864a3703b958e7d/FLAG3aba3a81d [2022-11-25 17:17:34,217 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/data/de5d843f3/fad2f31d82954cff8864a3703b958e7d [2022-11-25 17:17:34,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:17:34,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:17:34,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:17:34,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:17:34,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:17:34,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34, skipping insertion in model container [2022-11-25 17:17:34,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:17:34,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:17:34,480 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,493 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,517 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 17:17:34,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:17:34,552 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:17:34,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:17:34,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,577 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,581 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,583 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,588 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,591 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 17:17:34,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:17:34,604 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:17:34,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:17:34,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:17:34,647 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 17:17:34,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:17:34,671 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:17:34,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34 WrapperNode [2022-11-25 17:17:34,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:17:34,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:17:34,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:17:34,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:17:34,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,741 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-11-25 17:17:34,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:17:34,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:17:34,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:17:34,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:17:34,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:17:34,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:17:34,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:17:34,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:17:34,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (1/1) ... [2022-11-25 17:17:34,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:17:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:34,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:17:34,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:17:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:17:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:17:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:17:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:17:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:17:34,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:17:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:17:34,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:17:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:17:34,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:17:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:17:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:17:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:17:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:17:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:17:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:17:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:17:34,907 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:17:35,020 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:17:35,023 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:17:35,717 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:17:35,903 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:17:35,904 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:17:35,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:17:35 BoogieIcfgContainer [2022-11-25 17:17:35,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:17:35,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:17:35,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:17:35,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:17:35,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:17:34" (1/3) ... [2022-11-25 17:17:35,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2e219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:17:35, skipping insertion in model container [2022-11-25 17:17:35,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:34" (2/3) ... [2022-11-25 17:17:35,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2e219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:17:35, skipping insertion in model container [2022-11-25 17:17:35,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:17:35" (3/3) ... [2022-11-25 17:17:35,920 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-11-25 17:17:35,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:17:35,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-25 17:17:35,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:17:36,054 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:17:36,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-11-25 17:17:36,206 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-11-25 17:17:36,207 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:17:36,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-11-25 17:17:36,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 180 transitions, 384 flow [2022-11-25 17:17:36,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 172 transitions, 362 flow [2022-11-25 17:17:36,227 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:17:36,252 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 172 transitions, 362 flow [2022-11-25 17:17:36,255 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 172 transitions, 362 flow [2022-11-25 17:17:36,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 362 flow [2022-11-25 17:17:36,314 INFO L130 PetriNetUnfolder]: 12/172 cut-off events. [2022-11-25 17:17:36,314 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:17:36,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 12/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 201 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-11-25 17:17:36,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-25 17:18:02,451 INFO L134 LiptonReduction]: Checked pairs total: 3477 [2022-11-25 17:18:02,451 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-11-25 17:18:02,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:18:02,473 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2da58652, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:18:02,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-25 17:18:02,476 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:18:02,477 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:18:02,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:02,477 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:18:02,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 22923, now seen corresponding path program 1 times [2022-11-25 17:18:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:02,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017157689] [2022-11-25 17:18:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:02,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:02,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:02,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:18:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:18:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:02,846 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:18:02,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:18:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:02,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:02,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:02,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017157689] [2022-11-25 17:18:02,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017157689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:02,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:02,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:18:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225611200] [2022-11-25 17:18:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:02,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:03,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:18:03,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:03,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:03,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:18:03,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:04,472 INFO L130 PetriNetUnfolder]: 5413/6908 cut-off events. [2022-11-25 17:18:04,473 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-11-25 17:18:04,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13945 conditions, 6908 events. 5413/6908 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 31044 event pairs, 2582 based on Foata normal form. 0/1945 useless extension candidates. Maximal degree in co-relation 5975. Up to 3425 conditions per place. [2022-11-25 17:18:04,532 INFO L137 encePairwiseOnDemand]: 339/349 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-11-25 17:18:04,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2022-11-25 17:18:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-11-25 17:18:04,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5176695319961796 [2022-11-25 17:18:04,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-11-25 17:18:04,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-11-25 17:18:04,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:04,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-11-25 17:18:04,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:04,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:04,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:04,568 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 542 transitions. [2022-11-25 17:18:04,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2022-11-25 17:18:04,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:18:04,581 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2022-11-25 17:18:04,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-11-25 17:18:04,587 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-11-25 17:18:04,587 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2022-11-25 17:18:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:04,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:04,588 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:18:04,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:04,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 22922, now seen corresponding path program 1 times [2022-11-25 17:18:04,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:04,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687661781] [2022-11-25 17:18:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:04,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:04,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:18:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:18:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:04,982 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:18:04,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:18:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:05,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:05,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:05,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687661781] [2022-11-25 17:18:05,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687661781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:05,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:05,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:18:05,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398132378] [2022-11-25 17:18:05,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:05,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:05,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:18:05,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:05,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:05,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:18:05,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:06,091 INFO L130 PetriNetUnfolder]: 5413/6906 cut-off events. [2022-11-25 17:18:06,091 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:18:06,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13821 conditions, 6906 events. 5413/6906 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31295 event pairs, 2582 based on Foata normal form. 0/1947 useless extension candidates. Maximal degree in co-relation 6908. Up to 6844 conditions per place. [2022-11-25 17:18:06,140 INFO L137 encePairwiseOnDemand]: 347/349 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 17:18:06,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 186 flow [2022-11-25 17:18:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-11-25 17:18:06,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46609360076408785 [2022-11-25 17:18:06,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-11-25 17:18:06,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-11-25 17:18:06,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:06,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-11-25 17:18:06,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:06,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:06,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:06,151 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 488 transitions. [2022-11-25 17:18:06,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 186 flow [2022-11-25 17:18:06,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:06,154 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 104 flow [2022-11-25 17:18:06,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-11-25 17:18:06,156 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-11-25 17:18:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 104 flow [2022-11-25 17:18:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:06,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:06,157 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:18:06,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:06,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash 23069, now seen corresponding path program 1 times [2022-11-25 17:18:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:06,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285794255] [2022-11-25 17:18:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:06,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:06,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:06,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:18:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:18:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:06,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:06,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:06,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285794255] [2022-11-25 17:18:06,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285794255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:06,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:06,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:18:06,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126626198] [2022-11-25 17:18:06,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:06,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:06,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:06,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:06,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 349 [2022-11-25 17:18:06,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:06,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:06,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 349 [2022-11-25 17:18:06,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:07,207 INFO L130 PetriNetUnfolder]: 2707/3455 cut-off events. [2022-11-25 17:18:07,207 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 17:18:07,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6919 conditions, 3455 events. 2707/3455 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 14121 event pairs, 1291 based on Foata normal form. 1/976 useless extension candidates. Maximal degree in co-relation 6911. Up to 3424 conditions per place. [2022-11-25 17:18:07,236 INFO L137 encePairwiseOnDemand]: 344/349 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-11-25 17:18:07,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 186 flow [2022-11-25 17:18:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-11-25 17:18:07,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47468958930276983 [2022-11-25 17:18:07,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-11-25 17:18:07,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-11-25 17:18:07,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:07,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-11-25 17:18:07,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:07,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:07,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:07,252 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 104 flow. Second operand 3 states and 497 transitions. [2022-11-25 17:18:07,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 186 flow [2022-11-25 17:18:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 183 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:07,255 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 113 flow [2022-11-25 17:18:07,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-11-25 17:18:07,257 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2022-11-25 17:18:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 113 flow [2022-11-25 17:18:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:07,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:07,258 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:18:07,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-25 17:18:07,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:07,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash 715175, now seen corresponding path program 1 times [2022-11-25 17:18:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:07,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100833490] [2022-11-25 17:18:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:07,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:07,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:07,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:18:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:07,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:18:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:07,675 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 17:18:07,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-25 17:18:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:07,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:07,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100833490] [2022-11-25 17:18:07,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100833490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:07,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:07,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:18:07,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910810487] [2022-11-25 17:18:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:07,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:07,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:07,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:18:07,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:07,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:07,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:18:07,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:08,348 INFO L130 PetriNetUnfolder]: 2132/2754 cut-off events. [2022-11-25 17:18:08,349 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 17:18:08,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5522 conditions, 2754 events. 2132/2754 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 11139 event pairs, 1016 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 5512. Up to 2723 conditions per place. [2022-11-25 17:18:08,365 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 17:18:08,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 42 transitions, 185 flow [2022-11-25 17:18:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-11-25 17:18:08,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46513849092645654 [2022-11-25 17:18:08,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-11-25 17:18:08,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-11-25 17:18:08,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:08,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-11-25 17:18:08,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:08,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:08,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:08,374 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 113 flow. Second operand 3 states and 487 transitions. [2022-11-25 17:18:08,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 42 transitions, 185 flow [2022-11-25 17:18:08,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:18:08,377 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 105 flow [2022-11-25 17:18:08,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 17:18:08,379 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-11-25 17:18:08,380 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 105 flow [2022-11-25 17:18:08,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:08,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:08,381 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:18:08,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:08,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:08,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash 715029, now seen corresponding path program 1 times [2022-11-25 17:18:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:08,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169211847] [2022-11-25 17:18:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:08,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:08,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:08,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:18:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:18:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:08,833 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:18:08,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:18:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:08,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:09,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169211847] [2022-11-25 17:18:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169211847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:09,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:09,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:18:09,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666624800] [2022-11-25 17:18:09,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:09,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:18:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:18:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:18:10,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 349 [2022-11-25 17:18:10,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:10,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:10,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 349 [2022-11-25 17:18:10,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:11,568 INFO L130 PetriNetUnfolder]: 4267/5511 cut-off events. [2022-11-25 17:18:11,568 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:18:11,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11044 conditions, 5511 events. 4267/5511 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 24810 event pairs, 2032 based on Foata normal form. 0/1652 useless extension candidates. Maximal degree in co-relation 11034. Up to 2724 conditions per place. [2022-11-25 17:18:11,599 INFO L137 encePairwiseOnDemand]: 344/349 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2022-11-25 17:18:11,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 375 flow [2022-11-25 17:18:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:18:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:18:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 948 transitions. [2022-11-25 17:18:11,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45272206303724927 [2022-11-25 17:18:11,604 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 948 transitions. [2022-11-25 17:18:11,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 948 transitions. [2022-11-25 17:18:11,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:11,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 948 transitions. [2022-11-25 17:18:11,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:11,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:11,613 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:11,613 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 105 flow. Second operand 6 states and 948 transitions. [2022-11-25 17:18:11,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 375 flow [2022-11-25 17:18:11,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 84 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:11,615 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 182 flow [2022-11-25 17:18:11,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2022-11-25 17:18:11,616 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-11-25 17:18:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 182 flow [2022-11-25 17:18:11,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:11,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:11,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:18:11,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:11,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:11,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:11,830 INFO L85 PathProgramCache]: Analyzing trace with hash 715176, now seen corresponding path program 1 times [2022-11-25 17:18:11,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:11,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244449672] [2022-11-25 17:18:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:11,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:11,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:11,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:11,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:18:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:11,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:18:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:18:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:18:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:18:12,047 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-25 17:18:12,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-25 17:18:12,077 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:18:12,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 17:18:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:12,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:12,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:12,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244449672] [2022-11-25 17:18:12,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244449672] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:18:12,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:18:12,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-25 17:18:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064716824] [2022-11-25 17:18:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:12,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:18:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:18:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:18:12,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2022-11-25 17:18:12,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:12,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:12,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2022-11-25 17:18:12,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:13,606 INFO L130 PetriNetUnfolder]: 3115/4107 cut-off events. [2022-11-25 17:18:13,606 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:18:13,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 4107 events. 3115/4107 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18644 event pairs, 1482 based on Foata normal form. 0/1353 useless extension candidates. Maximal degree in co-relation 8241. Up to 4045 conditions per place. [2022-11-25 17:18:13,634 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 17:18:13,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 240 flow [2022-11-25 17:18:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2022-11-25 17:18:13,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44030563514804205 [2022-11-25 17:18:13,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2022-11-25 17:18:13,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2022-11-25 17:18:13,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:13,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2022-11-25 17:18:13,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:13,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:13,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:13,641 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 182 flow. Second operand 3 states and 461 transitions. [2022-11-25 17:18:13,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 240 flow [2022-11-25 17:18:13,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:13,643 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2022-11-25 17:18:13,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 17:18:13,644 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-11-25 17:18:13,644 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2022-11-25 17:18:13,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:13,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:13,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:18:13,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:13,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:13,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:13,863 INFO L85 PathProgramCache]: Analyzing trace with hash 687298896, now seen corresponding path program 1 times [2022-11-25 17:18:13,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:13,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957799766] [2022-11-25 17:18:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:13,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:13,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:13,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:18:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:18:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:14,049 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 17:18:14,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 17:18:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:14,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:14,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:14,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957799766] [2022-11-25 17:18:14,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957799766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:14,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:14,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:18:14,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480001770] [2022-11-25 17:18:14,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:14,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:14,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:14,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:14,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:18:14,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:14,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:14,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:18:14,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:14,880 INFO L130 PetriNetUnfolder]: 2941/3873 cut-off events. [2022-11-25 17:18:14,880 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:18:14,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 3873 events. 2941/3873 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 17301 event pairs, 1396 based on Foata normal form. 0/1309 useless extension candidates. Maximal degree in co-relation 7767. Up to 3811 conditions per place. [2022-11-25 17:18:14,905 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 17:18:14,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 220 flow [2022-11-25 17:18:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-11-25 17:18:14,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46131805157593125 [2022-11-25 17:18:14,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-11-25 17:18:14,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-11-25 17:18:14,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:14,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-11-25 17:18:14,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:14,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:14,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:14,912 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 3 states and 483 transitions. [2022-11-25 17:18:14,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 220 flow [2022-11-25 17:18:14,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:14,914 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 141 flow [2022-11-25 17:18:14,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2022-11-25 17:18:14,915 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2022-11-25 17:18:14,915 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 141 flow [2022-11-25 17:18:14,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:14,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:14,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:18:14,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:15,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash 687298897, now seen corresponding path program 1 times [2022-11-25 17:18:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:15,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924126049] [2022-11-25 17:18:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:15,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:18:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:18:15,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:15,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:18:15,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:18:15,354 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-25 17:18:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-25 17:18:15,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 17:18:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:15,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:15,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:15,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924126049] [2022-11-25 17:18:15,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924126049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:15,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:15,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:18:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667574988] [2022-11-25 17:18:15,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:18:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:15,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:18:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:18:16,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:18:16,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 141 flow. Second operand has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:16,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:16,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:18:16,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:17,802 INFO L130 PetriNetUnfolder]: 2767/3639 cut-off events. [2022-11-25 17:18:17,802 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:18:17,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7316 conditions, 3639 events. 2767/3639 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 15989 event pairs, 1310 based on Foata normal form. 0/1265 useless extension candidates. Maximal degree in co-relation 7299. Up to 1791 conditions per place. [2022-11-25 17:18:17,826 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-11-25 17:18:17,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 341 flow [2022-11-25 17:18:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:18:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:18:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2022-11-25 17:18:17,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.439541547277937 [2022-11-25 17:18:17,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2022-11-25 17:18:17,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2022-11-25 17:18:17,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:17,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2022-11-25 17:18:17,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:17,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:17,835 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:17,836 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 141 flow. Second operand 5 states and 767 transitions. [2022-11-25 17:18:17,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 341 flow [2022-11-25 17:18:17,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:17,838 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 142 flow [2022-11-25 17:18:17,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2022-11-25 17:18:17,839 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-11-25 17:18:17,839 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 142 flow [2022-11-25 17:18:17,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:17,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:17,840 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:18:17,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-25 17:18:18,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:18,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash -168575793, now seen corresponding path program 1 times [2022-11-25 17:18:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567410818] [2022-11-25 17:18:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:18,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:18,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:18,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:18:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:18:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:18,236 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:18:18,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:18:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:18,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:18,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567410818] [2022-11-25 17:18:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567410818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:18:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880351067] [2022-11-25 17:18:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:18,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:18:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:18:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:18:18,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 349 [2022-11-25 17:18:18,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:18,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 349 [2022-11-25 17:18:18,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:18,748 INFO L130 PetriNetUnfolder]: 1427/1935 cut-off events. [2022-11-25 17:18:18,748 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:18:18,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 1935 events. 1427/1935 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8064 event pairs, 662 based on Foata normal form. 0/827 useless extension candidates. Maximal degree in co-relation 3893. Up to 1886 conditions per place. [2022-11-25 17:18:18,758 INFO L137 encePairwiseOnDemand]: 344/349 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-11-25 17:18:18,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 38 transitions, 206 flow [2022-11-25 17:18:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:18:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:18:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2022-11-25 17:18:18,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4355300859598854 [2022-11-25 17:18:18,761 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2022-11-25 17:18:18,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2022-11-25 17:18:18,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:18,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2022-11-25 17:18:18,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,766 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 142 flow. Second operand 4 states and 608 transitions. [2022-11-25 17:18:18,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 38 transitions, 206 flow [2022-11-25 17:18:18,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 201 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:18:18,768 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 139 flow [2022-11-25 17:18:18,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-11-25 17:18:18,769 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2022-11-25 17:18:18,769 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 139 flow [2022-11-25 17:18:18,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:18,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:18,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:18:18,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:18,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:18,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash -168575792, now seen corresponding path program 1 times [2022-11-25 17:18:18,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:18,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767426446] [2022-11-25 17:18:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:18,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:19,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:18:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:18:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:19,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:19,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-25 17:18:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:19,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767426446] [2022-11-25 17:18:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767426446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:19,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:19,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:18:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326074087] [2022-11-25 17:18:19,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:18:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:18:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:21,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:18:21,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 139 flow. Second operand has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:21,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:21,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:18:21,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:22,650 INFO L130 PetriNetUnfolder]: 2129/2937 cut-off events. [2022-11-25 17:18:22,650 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-25 17:18:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5944 conditions, 2937 events. 2129/2937 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 13921 event pairs, 686 based on Foata normal form. 0/1359 useless extension candidates. Maximal degree in co-relation 5926. Up to 875 conditions per place. [2022-11-25 17:18:22,662 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 98 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2022-11-25 17:18:22,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 527 flow [2022-11-25 17:18:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:18:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:18:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1385 transitions. [2022-11-25 17:18:22,668 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409423750397962 [2022-11-25 17:18:22,668 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1385 transitions. [2022-11-25 17:18:22,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1385 transitions. [2022-11-25 17:18:22,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:22,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1385 transitions. [2022-11-25 17:18:22,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.88888888888889) internal successors, (1385), 9 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,677 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,678 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 139 flow. Second operand 9 states and 1385 transitions. [2022-11-25 17:18:22,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 527 flow [2022-11-25 17:18:22,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 521 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:18:22,680 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 183 flow [2022-11-25 17:18:22,681 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2022-11-25 17:18:22,681 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2022-11-25 17:18:22,681 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 183 flow [2022-11-25 17:18:22,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:22,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:22,682 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:18:22,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:22,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:22,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -169022453, now seen corresponding path program 2 times [2022-11-25 17:18:22,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:22,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816923189] [2022-11-25 17:18:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:18:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:22,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:22,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:18:23,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:18:23,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:18:23,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:18:23,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:23,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:18:23,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:18:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:23,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:24,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816923189] [2022-11-25 17:18:24,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816923189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:24,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:24,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:18:24,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624972353] [2022-11-25 17:18:24,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:24,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:18:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:18:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:18:27,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2022-11-25 17:18:27,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 183 flow. Second operand has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:27,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:27,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2022-11-25 17:18:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:32,943 INFO L130 PetriNetUnfolder]: 7891/11071 cut-off events. [2022-11-25 17:18:32,943 INFO L131 PetriNetUnfolder]: For 2407/2802 co-relation queries the response was YES. [2022-11-25 17:18:32,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24679 conditions, 11071 events. 7891/11071 cut-off events. For 2407/2802 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 63121 event pairs, 4269 based on Foata normal form. 401/6199 useless extension candidates. Maximal degree in co-relation 24659. Up to 1278 conditions per place. [2022-11-25 17:18:33,013 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 245 selfloop transitions, 12 changer transitions 0/261 dead transitions. [2022-11-25 17:18:33,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 261 transitions, 1334 flow [2022-11-25 17:18:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:18:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:18:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1994 transitions. [2022-11-25 17:18:33,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4761222540592168 [2022-11-25 17:18:33,020 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1994 transitions. [2022-11-25 17:18:33,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1994 transitions. [2022-11-25 17:18:33,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:33,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1994 transitions. [2022-11-25 17:18:33,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.16666666666666) internal successors, (1994), 12 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,034 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,034 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 183 flow. Second operand 12 states and 1994 transitions. [2022-11-25 17:18:33,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 261 transitions, 1334 flow [2022-11-25 17:18:33,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 261 transitions, 1317 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 17:18:33,042 INFO L231 Difference]: Finished difference. Result has 73 places, 49 transitions, 267 flow [2022-11-25 17:18:33,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=49} [2022-11-25 17:18:33,043 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-11-25 17:18:33,043 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 49 transitions, 267 flow [2022-11-25 17:18:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:33,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:33,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:33,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:33,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -930879191, now seen corresponding path program 1 times [2022-11-25 17:18:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627886256] [2022-11-25 17:18:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:33,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:33,258 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:33,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:18:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:18:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:33,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:18:33,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:18:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:33,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:34,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:34,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627886256] [2022-11-25 17:18:34,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627886256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:34,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:34,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:18:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445071437] [2022-11-25 17:18:34,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:34,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:18:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:18:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:37,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:18:37,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 49 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:37,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:37,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:18:37,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:40,503 INFO L130 PetriNetUnfolder]: 14951/19922 cut-off events. [2022-11-25 17:18:40,503 INFO L131 PetriNetUnfolder]: For 2338/2338 co-relation queries the response was YES. [2022-11-25 17:18:40,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45911 conditions, 19922 events. 14951/19922 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 112016 event pairs, 963 based on Foata normal form. 450/11543 useless extension candidates. Maximal degree in co-relation 45885. Up to 6057 conditions per place. [2022-11-25 17:18:40,630 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2022-11-25 17:18:40,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 648 flow [2022-11-25 17:18:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:18:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:18:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1237 transitions. [2022-11-25 17:18:40,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44305157593123207 [2022-11-25 17:18:40,635 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1237 transitions. [2022-11-25 17:18:40,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1237 transitions. [2022-11-25 17:18:40,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:40,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1237 transitions. [2022-11-25 17:18:40,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:40,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:40,645 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:40,645 INFO L175 Difference]: Start difference. First operand has 73 places, 49 transitions, 267 flow. Second operand 8 states and 1237 transitions. [2022-11-25 17:18:40,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 648 flow [2022-11-25 17:18:40,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-25 17:18:40,653 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2022-11-25 17:18:40,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2022-11-25 17:18:40,654 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2022-11-25 17:18:40,654 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2022-11-25 17:18:40,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:40,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:40,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:40,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-25 17:18:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:40,866 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash -930708855, now seen corresponding path program 1 times [2022-11-25 17:18:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:40,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857724765] [2022-11-25 17:18:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:40,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:40,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:40,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:40,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:18:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:18:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:41,145 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:18:41,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:18:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:41,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:41,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857724765] [2022-11-25 17:18:41,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857724765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:41,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:41,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:18:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447822788] [2022-11-25 17:18:41,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:41,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:18:41,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:18:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:18:44,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:44,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:18:44,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:44,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:44,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:18:44,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:47,423 INFO L130 PetriNetUnfolder]: 11936/16106 cut-off events. [2022-11-25 17:18:47,423 INFO L131 PetriNetUnfolder]: For 27079/28519 co-relation queries the response was YES. [2022-11-25 17:18:47,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45225 conditions, 16106 events. 11936/16106 cut-off events. For 27079/28519 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 88069 event pairs, 6228 based on Foata normal form. 1440/11042 useless extension candidates. Maximal degree in co-relation 45193. Up to 14100 conditions per place. [2022-11-25 17:18:47,571 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-11-25 17:18:47,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2022-11-25 17:18:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:18:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:18:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2022-11-25 17:18:47,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433810888252149 [2022-11-25 17:18:47,575 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2022-11-25 17:18:47,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2022-11-25 17:18:47,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:47,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2022-11-25 17:18:47,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:47,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:47,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:47,583 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 757 transitions. [2022-11-25 17:18:47,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2022-11-25 17:18:47,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-25 17:18:47,605 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2022-11-25 17:18:47,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2022-11-25 17:18:47,606 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2022-11-25 17:18:47,607 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2022-11-25 17:18:47,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:47,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:47,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:47,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:47,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:47,820 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash -930708856, now seen corresponding path program 1 times [2022-11-25 17:18:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74564257] [2022-11-25 17:18:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:47,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:47,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:47,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:18:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:47,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:18:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:48,028 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 17:18:48,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-25 17:18:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:48,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:18:48,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:48,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74564257] [2022-11-25 17:18:48,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74564257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:18:48,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:18:48,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:18:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148263190] [2022-11-25 17:18:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:18:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:18:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:18:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:18:48,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 349 [2022-11-25 17:18:48,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:48,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:48,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 349 [2022-11-25 17:18:48,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:49,900 INFO L130 PetriNetUnfolder]: 11054/14864 cut-off events. [2022-11-25 17:18:49,900 INFO L131 PetriNetUnfolder]: For 19989/21253 co-relation queries the response was YES. [2022-11-25 17:18:49,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39170 conditions, 14864 events. 11054/14864 cut-off events. For 19989/21253 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 80071 event pairs, 5724 based on Foata normal form. 1264/10270 useless extension candidates. Maximal degree in co-relation 39138. Up to 14621 conditions per place. [2022-11-25 17:18:50,000 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-11-25 17:18:50,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2022-11-25 17:18:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:18:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:18:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2022-11-25 17:18:50,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44412607449856734 [2022-11-25 17:18:50,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2022-11-25 17:18:50,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2022-11-25 17:18:50,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:50,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2022-11-25 17:18:50,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,007 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 465 transitions. [2022-11-25 17:18:50,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2022-11-25 17:18:50,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:18:50,023 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2022-11-25 17:18:50,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2022-11-25 17:18:50,024 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2022-11-25 17:18:50,024 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2022-11-25 17:18:50,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:50,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:50,025 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:50,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:50,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:50,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1212791490, now seen corresponding path program 1 times [2022-11-25 17:18:50,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:50,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254025113] [2022-11-25 17:18:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:50,236 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:50,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:18:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:50,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:18:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:50,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:50,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-25 17:18:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:18:50,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:50,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254025113] [2022-11-25 17:18:50,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254025113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:50,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:50,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:18:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587301833] [2022-11-25 17:18:50,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:50,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:18:50,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:50,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:18:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:18:52,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:18:52,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:52,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:18:52,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:18:52,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:18:56,362 INFO L130 PetriNetUnfolder]: 15293/21011 cut-off events. [2022-11-25 17:18:56,363 INFO L131 PetriNetUnfolder]: For 33980/36104 co-relation queries the response was YES. [2022-11-25 17:18:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56773 conditions, 21011 events. 15293/21011 cut-off events. For 33980/36104 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 121108 event pairs, 5143 based on Foata normal form. 2124/16245 useless extension candidates. Maximal degree in co-relation 56741. Up to 12177 conditions per place. [2022-11-25 17:18:56,513 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2022-11-25 17:18:56,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2022-11-25 17:18:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:18:56,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:18:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1365 transitions. [2022-11-25 17:18:56,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43457497612225404 [2022-11-25 17:18:56,518 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1365 transitions. [2022-11-25 17:18:56,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1365 transitions. [2022-11-25 17:18:56,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:18:56,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1365 transitions. [2022-11-25 17:18:56,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.66666666666666) internal successors, (1365), 9 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:56,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:56,528 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:56,529 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1365 transitions. [2022-11-25 17:18:56,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2022-11-25 17:18:56,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:18:56,552 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2022-11-25 17:18:56,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2022-11-25 17:18:56,552 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2022-11-25 17:18:56,553 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2022-11-25 17:18:56,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:18:56,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:18:56,554 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:18:56,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:18:56,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:56,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:18:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:18:56,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1058166894, now seen corresponding path program 1 times [2022-11-25 17:18:56,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:18:56,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486682274] [2022-11-25 17:18:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:18:56,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:18:56,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:18:56,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:18:56,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:18:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:18:56,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:18:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:18:57,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:18:57,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:18:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:57,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:18:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:18:57,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:18:57,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486682274] [2022-11-25 17:18:57,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486682274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:18:57,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:18:57,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:18:57,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943934331] [2022-11-25 17:18:57,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:18:57,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:18:57,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:18:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:18:57,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:19:00,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:19:00,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:00,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:00,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:19:00,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:07,852 INFO L130 PetriNetUnfolder]: 29713/40111 cut-off events. [2022-11-25 17:19:07,852 INFO L131 PetriNetUnfolder]: For 67950/71874 co-relation queries the response was YES. [2022-11-25 17:19:08,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118378 conditions, 40111 events. 29713/40111 cut-off events. For 67950/71874 co-relation queries the response was YES. Maximal size of possible extension queue 1652. Compared 246805 event pairs, 4383 based on Foata normal form. 3924/34783 useless extension candidates. Maximal degree in co-relation 118343. Up to 10281 conditions per place. [2022-11-25 17:19:08,185 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2022-11-25 17:19:08,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2022-11-25 17:19:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:19:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:19:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1364 transitions. [2022-11-25 17:19:08,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43425660617637696 [2022-11-25 17:19:08,192 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1364 transitions. [2022-11-25 17:19:08,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1364 transitions. [2022-11-25 17:19:08,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:08,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1364 transitions. [2022-11-25 17:19:08,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.55555555555554) internal successors, (1364), 9 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:08,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:08,203 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:08,203 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1364 transitions. [2022-11-25 17:19:08,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2022-11-25 17:19:08,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:19:08,263 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2022-11-25 17:19:08,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2022-11-25 17:19:08,264 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2022-11-25 17:19:08,264 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2022-11-25 17:19:08,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:08,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:08,265 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:08,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:08,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:19:08,483 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:19:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash 784894736, now seen corresponding path program 2 times [2022-11-25 17:19:08,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:08,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641358330] [2022-11-25 17:19:08,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:19:08,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:19:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:08,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:19:08,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:19:08,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:19:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:19:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:19:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:08,776 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:19:08,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:19:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:10,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641358330] [2022-11-25 17:19:10,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641358330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:10,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:10,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-25 17:19:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447786476] [2022-11-25 17:19:10,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:10,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:19:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:19:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:19:24,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 349 [2022-11-25 17:19:24,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:24,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:24,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 349 [2022-11-25 17:19:24,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:19:41,944 INFO L130 PetriNetUnfolder]: 29869/40797 cut-off events. [2022-11-25 17:19:41,944 INFO L131 PetriNetUnfolder]: For 106397/109178 co-relation queries the response was YES. [2022-11-25 17:19:42,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138922 conditions, 40797 events. 29869/40797 cut-off events. For 106397/109178 co-relation queries the response was YES. Maximal size of possible extension queue 1764. Compared 258438 event pairs, 9063 based on Foata normal form. 3087/35251 useless extension candidates. Maximal degree in co-relation 138883. Up to 15850 conditions per place. [2022-11-25 17:19:42,297 INFO L137 encePairwiseOnDemand]: 341/349 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2022-11-25 17:19:42,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 324 transitions, 2433 flow [2022-11-25 17:19:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:19:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:19:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2810 transitions. [2022-11-25 17:19:42,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42376715427537326 [2022-11-25 17:19:42,306 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2810 transitions. [2022-11-25 17:19:42,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2810 transitions. [2022-11-25 17:19:42,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:19:42,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2810 transitions. [2022-11-25 17:19:42,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.89473684210526) internal successors, (2810), 19 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:42,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 349.0) internal successors, (6980), 20 states have internal predecessors, (6980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:42,322 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 349.0) internal successors, (6980), 20 states have internal predecessors, (6980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:42,323 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 19 states and 2810 transitions. [2022-11-25 17:19:42,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 324 transitions, 2433 flow [2022-11-25 17:19:42,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 324 transitions, 2214 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-11-25 17:19:42,521 INFO L231 Difference]: Finished difference. Result has 116 places, 70 transitions, 552 flow [2022-11-25 17:19:42,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=552, PETRI_PLACES=116, PETRI_TRANSITIONS=70} [2022-11-25 17:19:42,522 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2022-11-25 17:19:42,522 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 70 transitions, 552 flow [2022-11-25 17:19:42,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:42,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:19:42,523 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:19:42,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:19:42,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:19:42,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:19:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:19:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1561818899, now seen corresponding path program 1 times [2022-11-25 17:19:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:19:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231188969] [2022-11-25 17:19:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:19:42,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:19:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:19:42,738 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:19:42,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:19:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:19:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:19:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:19:42,984 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:19:42,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:19:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:43,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:19:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:19:43,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:19:43,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231188969] [2022-11-25 17:19:43,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231188969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:19:43,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:19:43,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:19:43,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568136491] [2022-11-25 17:19:43,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:19:43,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:19:43,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:19:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:19:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:19:50,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 349 [2022-11-25 17:19:50,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 70 transitions, 552 flow. Second operand has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:19:50,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:19:50,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 349 [2022-11-25 17:19:50,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:00,105 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2022-11-25 17:20:00,105 INFO L131 PetriNetUnfolder]: For 162406/169209 co-relation queries the response was YES. [2022-11-25 17:20:00,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143635 conditions, 38781 events. 27287/38781 cut-off events. For 162406/169209 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 248901 event pairs, 17843 based on Foata normal form. 6803/40814 useless extension candidates. Maximal degree in co-relation 143589. Up to 22069 conditions per place. [2022-11-25 17:20:00,531 INFO L137 encePairwiseOnDemand]: 341/349 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2022-11-25 17:20:00,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1388 flow [2022-11-25 17:20:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:20:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:20:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2022-11-25 17:20:00,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41417035686376663 [2022-11-25 17:20:00,537 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2022-11-25 17:20:00,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2022-11-25 17:20:00,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:00,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2022-11-25 17:20:00,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 349.0) internal successors, (4188), 12 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,548 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 349.0) internal successors, (4188), 12 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,548 INFO L175 Difference]: Start difference. First operand has 116 places, 70 transitions, 552 flow. Second operand 11 states and 1590 transitions. [2022-11-25 17:20:00,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1388 flow [2022-11-25 17:20:00,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1299 flow, removed 31 selfloop flow, removed 9 redundant places. [2022-11-25 17:20:00,789 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 545 flow [2022-11-25 17:20:00,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=545, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2022-11-25 17:20:00,790 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2022-11-25 17:20:00,790 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 545 flow [2022-11-25 17:20:00,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:00,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:00,791 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:20:00,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:01,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:20:01,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:20:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1171749636, now seen corresponding path program 1 times [2022-11-25 17:20:01,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:01,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147524306] [2022-11-25 17:20:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:20:01,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:20:01,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:01,009 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:20:01,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:20:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:20:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:20:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:01,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:01,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147524306] [2022-11-25 17:20:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147524306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:01,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:01,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:20:01,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117656552] [2022-11-25 17:20:01,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:20:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:20:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:20:03,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:20:03,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 545 flow. Second operand has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:03,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:03,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:20:03,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:09,666 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2022-11-25 17:20:09,667 INFO L131 PetriNetUnfolder]: For 130321/135879 co-relation queries the response was YES. [2022-11-25 17:20:09,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123942 conditions, 30859 events. 21755/30859 cut-off events. For 130321/135879 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 192015 event pairs, 11742 based on Foata normal form. 5646/34866 useless extension candidates. Maximal degree in co-relation 123896. Up to 22599 conditions per place. [2022-11-25 17:20:10,008 INFO L137 encePairwiseOnDemand]: 341/349 looper letters, 147 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2022-11-25 17:20:10,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 160 transitions, 1341 flow [2022-11-25 17:20:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:20:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:20:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1360 transitions. [2022-11-25 17:20:10,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329831263928685 [2022-11-25 17:20:10,012 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1360 transitions. [2022-11-25 17:20:10,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1360 transitions. [2022-11-25 17:20:10,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:10,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1360 transitions. [2022-11-25 17:20:10,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.11111111111111) internal successors, (1360), 9 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,021 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,021 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 545 flow. Second operand 9 states and 1360 transitions. [2022-11-25 17:20:10,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 160 transitions, 1341 flow [2022-11-25 17:20:10,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1320 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 17:20:10,465 INFO L231 Difference]: Finished difference. Result has 124 places, 75 transitions, 555 flow [2022-11-25 17:20:10,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=555, PETRI_PLACES=124, PETRI_TRANSITIONS=75} [2022-11-25 17:20:10,466 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2022-11-25 17:20:10,466 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 75 transitions, 555 flow [2022-11-25 17:20:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:10,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:20:10,467 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-25 17:20:10,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:20:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:20:10,667 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:20:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:20:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash -884592993, now seen corresponding path program 3 times [2022-11-25 17:20:10,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:20:10,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840313590] [2022-11-25 17:20:10,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:20:10,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:20:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:20:10,669 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:20:10,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:20:10,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:20:10,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:20:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:20:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:20:11,076 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:20:11,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:20:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:11,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:20:11,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:20:11,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 17:20:11,786 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 17:20:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:20:14,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:20:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840313590] [2022-11-25 17:20:14,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840313590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:20:14,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:20:14,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-25 17:20:14,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583174108] [2022-11-25 17:20:14,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:20:14,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:20:14,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:20:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:20:14,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:20:35,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:20:35,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 75 transitions, 555 flow. Second operand has 21 states, 21 states have (on average 141.14285714285714) internal successors, (2964), 21 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:35,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:20:35,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:20:35,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:20:59,132 INFO L130 PetriNetUnfolder]: 31437/43945 cut-off events. [2022-11-25 17:20:59,132 INFO L131 PetriNetUnfolder]: For 161102/165101 co-relation queries the response was YES. [2022-11-25 17:20:59,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191531 conditions, 43945 events. 31437/43945 cut-off events. For 161102/165101 co-relation queries the response was YES. Maximal size of possible extension queue 1957. Compared 294564 event pairs, 10865 based on Foata normal form. 4345/44443 useless extension candidates. Maximal degree in co-relation 191483. Up to 19699 conditions per place. [2022-11-25 17:20:59,870 INFO L137 encePairwiseOnDemand]: 340/349 looper letters, 395 selfloop transitions, 46 changer transitions 0/446 dead transitions. [2022-11-25 17:20:59,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 446 transitions, 3412 flow [2022-11-25 17:20:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:20:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:20:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3659 transitions. [2022-11-25 17:20:59,881 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368433619866285 [2022-11-25 17:20:59,881 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3659 transitions. [2022-11-25 17:20:59,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3659 transitions. [2022-11-25 17:20:59,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:20:59,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3659 transitions. [2022-11-25 17:20:59,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 152.45833333333334) internal successors, (3659), 24 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 349.0) internal successors, (8725), 25 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,905 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 349.0) internal successors, (8725), 25 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:20:59,905 INFO L175 Difference]: Start difference. First operand has 124 places, 75 transitions, 555 flow. Second operand 24 states and 3659 transitions. [2022-11-25 17:20:59,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 446 transitions, 3412 flow [2022-11-25 17:21:01,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 446 transitions, 3396 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:21:01,345 INFO L231 Difference]: Finished difference. Result has 153 places, 103 transitions, 963 flow [2022-11-25 17:21:01,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=963, PETRI_PLACES=153, PETRI_TRANSITIONS=103} [2022-11-25 17:21:01,346 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2022-11-25 17:21:01,347 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 103 transitions, 963 flow [2022-11-25 17:21:01,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 141.14285714285714) internal successors, (2964), 21 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:01,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:21:01,349 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:21:01,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:21:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:21:01,571 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:21:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:21:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1002901557, now seen corresponding path program 3 times [2022-11-25 17:21:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:21:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860844708] [2022-11-25 17:21:01,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:21:01,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:21:01,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:21:01,574 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:21:01,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eecbec1-887c-4c49-8cf7-d28ec9a5e603/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:21:01,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:21:01,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:21:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:21:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:21:01,988 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:21:01,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:21:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:02,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:21:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:21:06,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:21:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860844708] [2022-11-25 17:21:06,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860844708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:21:06,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:21:06,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:21:06,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125034701] [2022-11-25 17:21:06,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:21:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:21:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:21:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:21:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:21:27,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2022-11-25 17:21:27,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 103 transitions, 963 flow. Second operand has 24 states, 24 states have (on average 146.0) internal successors, (3504), 24 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:21:27,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:21:27,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2022-11-25 17:21:27,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand