./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- 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 18:13:09,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:13:09,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:13:09,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:13:09,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:13:09,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:13:09,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:13:09,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:13:09,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:13:09,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:13:09,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:13:09,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:13:09,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:13:09,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:13:09,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:13:09,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:13:09,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:13:09,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:13:09,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:13:09,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:13:09,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:13:09,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:13:09,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:13:09,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:13:09,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:13:09,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:13:09,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:13:09,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:13:09,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:13:09,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:13:09,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:13:09,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:13:09,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:13:09,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:13:09,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:13:09,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:13:09,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:13:09,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:13:09,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:13:09,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:13:09,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:13:09,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:13:09,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:13:09,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:13:09,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:13:09,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:13:09,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:13:09,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:13:09,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:13:09,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:13:09,905 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:13:09,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:13:09,906 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:13:09,906 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:13:09,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:13:09,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:13:09,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:13:09,907 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:13:09,907 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:13:09,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:13:09,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:13:09,908 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:13:09,908 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:13:09,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:13:09,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:13:09,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:13:09,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:13:09,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:13:09,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:13:09,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:13:09,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:13:09,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:13:09,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:13:09,918 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:13:09,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:13:09,918 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2022-11-25 18:13:10,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:13:10,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:13:10,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:13:10,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:13:10,340 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:13:10,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-25 18:13:13,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:13:14,010 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:13:14,011 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-25 18:13:14,021 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data/dabe099dc/a8c183924d9c4cfe9ada8bf2fdf7d9db/FLAG13f544b0c [2022-11-25 18:13:14,040 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data/dabe099dc/a8c183924d9c4cfe9ada8bf2fdf7d9db [2022-11-25 18:13:14,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:13:14,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:13:14,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:13:14,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:13:14,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:13:14,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:14" (1/1) ... [2022-11-25 18:13:14,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b7356e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:14, skipping insertion in model container [2022-11-25 18:13:14,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:14" (1/1) ... [2022-11-25 18:13:14,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:13:14,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:13:14,381 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-25 18:13:14,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:13:14,426 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 18:13:14,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f23a508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:14, skipping insertion in model container [2022-11-25 18:13:14,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:13:14,431 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 18:13:14,435 INFO L158 Benchmark]: Toolchain (without parser) took 387.81ms. Allocated memory is still 197.1MB. Free memory was 166.1MB in the beginning and 156.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:13:14,436 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 134.2MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:13:14,437 INFO L158 Benchmark]: CACSL2BoogieTranslator took 383.91ms. Allocated memory is still 197.1MB. Free memory was 165.6MB in the beginning and 156.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:13:14,439 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 134.2MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 383.91ms. Allocated memory is still 197.1MB. Free memory was 165.6MB in the beginning and 156.0MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 --- 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 18:13:17,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:13:17,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:13:17,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:13:17,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:13:17,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:13:17,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:13:17,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:13:17,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:13:17,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:13:17,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:13:17,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:13:17,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:13:17,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:13:17,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:13:17,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:13:17,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:13:17,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:13:17,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:13:17,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:13:17,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:13:17,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:13:17,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:13:17,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:13:17,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:13:17,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:13:17,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:13:17,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:13:17,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:13:17,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:13:17,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:13:17,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:13:17,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:13:17,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:13:17,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:13:17,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:13:17,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:13:17,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:13:17,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:13:17,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:13:17,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:13:17,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:13:17,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:13:17,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:13:17,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:13:17,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:13:17,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:13:17,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:13:17,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:13:17,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:13:17,385 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:13:17,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:13:17,386 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:13:17,387 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:13:17,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:13:17,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:13:17,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:13:17,388 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:13:17,388 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:13:17,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:13:17,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:13:17,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:13:17,389 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:13:17,389 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:13:17,389 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:13:17,390 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:13:17,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:13:17,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:13:17,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:13:17,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:13:17,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:13:17,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:13:17,391 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:13:17,392 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:13:17,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:13:17,392 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:13:17,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:13:17,393 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:13:17,393 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c870162e8691a06e8bb6a8083be9eaf3f7ddc94357fb302a6e1fdd1b7aa873f8 [2022-11-25 18:13:17,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:13:17,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:13:17,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:13:17,891 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:13:17,891 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:13:17,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-25 18:13:21,281 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:13:21,604 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:13:21,605 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2022-11-25 18:13:21,618 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data/2f6bb64ef/4492f900699642d5b7b0891c1407db78/FLAG57710672f [2022-11-25 18:13:21,658 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/data/2f6bb64ef/4492f900699642d5b7b0891c1407db78 [2022-11-25 18:13:21,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:13:21,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:13:21,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:13:21,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:13:21,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:13:21,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:21" (1/1) ... [2022-11-25 18:13:21,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294eb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:21, skipping insertion in model container [2022-11-25 18:13:21,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:21" (1/1) ... [2022-11-25 18:13:21,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:13:21,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:13:22,004 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-25 18:13:22,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:13:22,043 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 18:13:22,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:13:22,063 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-25 18:13:22,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:13:22,075 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:13:22,103 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_67fe7af4-0f26-4a47-a45d-4f8fecd08999/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2755,2768] [2022-11-25 18:13:22,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:13:22,135 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:13:22,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22 WrapperNode [2022-11-25 18:13:22,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:13:22,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:13:22,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:13:22,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:13:22,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,206 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 259 [2022-11-25 18:13:22,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:13:22,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:13:22,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:13:22,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:13:22,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:13:22,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:13:22,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:13:22,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:13:22,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (1/1) ... [2022-11-25 18:13:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:13:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:13:22,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:13:22,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:13:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:13:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:13:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:13:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:13:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:13:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:13:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:13:22,437 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 18:13:22,606 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:13:22,609 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:13:23,850 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:13:23,866 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:13:23,867 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:13:23,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:23 BoogieIcfgContainer [2022-11-25 18:13:23,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:13:23,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:13:23,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:13:23,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:13:23,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:13:21" (1/3) ... [2022-11-25 18:13:23,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468647a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:23, skipping insertion in model container [2022-11-25 18:13:23,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:22" (2/3) ... [2022-11-25 18:13:23,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468647a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:23, skipping insertion in model container [2022-11-25 18:13:23,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:23" (3/3) ... [2022-11-25 18:13:23,882 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2022-11-25 18:13:23,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:13:23,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-25 18:13:23,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:13:24,114 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:13:24,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 404 transitions, 824 flow [2022-11-25 18:13:24,457 INFO L130 PetriNetUnfolder]: 28/402 cut-off events. [2022-11-25 18:13:24,457 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:13:24,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 402 events. 28/402 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1029 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2022-11-25 18:13:24,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 404 transitions, 824 flow [2022-11-25 18:13:24,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 376 places, 397 transitions, 806 flow [2022-11-25 18:13:24,499 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:13:24,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 376 places, 397 transitions, 806 flow [2022-11-25 18:13:24,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 376 places, 397 transitions, 806 flow [2022-11-25 18:13:24,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 397 transitions, 806 flow [2022-11-25 18:13:24,677 INFO L130 PetriNetUnfolder]: 28/397 cut-off events. [2022-11-25 18:13:24,677 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:13:24,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 397 events. 28/397 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1023 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 279. Up to 2 conditions per place. [2022-11-25 18:13:24,707 INFO L119 LiptonReduction]: Number of co-enabled transitions 40920 [2022-11-25 18:14:18,321 INFO L134 LiptonReduction]: Checked pairs total: 37583 [2022-11-25 18:14:18,322 INFO L136 LiptonReduction]: Total number of compositions: 503 [2022-11-25 18:14:18,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:14:18,345 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;@196442fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:14:18,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-25 18:14:18,349 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:14:18,349 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:14:18,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:18,350 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:14:18,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:18,356 INFO L85 PathProgramCache]: Analyzing trace with hash 54872, now seen corresponding path program 1 times [2022-11-25 18:14:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:18,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084390064] [2022-11-25 18:14:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:18,370 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 18:14:18,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:18,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:18,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:14:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:18,717 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:14:18,718 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:14:18,746 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 18:14:18,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:18,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084390064] [2022-11-25 18:14:18,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084390064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:18,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:18,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:14:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745159477] [2022-11-25 18:14:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:18,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:19,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 907 [2022-11-25 18:14:19,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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 18:14:19,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:19,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 907 [2022-11-25 18:14:19,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:19,480 INFO L130 PetriNetUnfolder]: 230/373 cut-off events. [2022-11-25 18:14:19,480 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:14:19,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 373 events. 230/373 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 1269 event pairs, 161 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 676. Up to 373 conditions per place. [2022-11-25 18:14:19,485 INFO L137 encePairwiseOnDemand]: 896/907 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-11-25 18:14:19,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 136 flow [2022-11-25 18:14:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:14:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1151 transitions. [2022-11-25 18:14:19,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42300624770305034 [2022-11-25 18:14:19,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1151 transitions. [2022-11-25 18:14:19,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1151 transitions. [2022-11-25 18:14:19,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:19,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1151 transitions. [2022-11-25 18:14:19,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.6666666666667) internal successors, (1151), 3 states have internal predecessors, (1151), 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 18:14:19,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:19,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:19,540 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 1151 transitions. [2022-11-25 18:14:19,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 136 flow [2022-11-25 18:14:19,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:14:19,546 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 68 flow [2022-11-25 18:14:19,549 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2022-11-25 18:14:19,555 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -12 predicate places. [2022-11-25 18:14:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 68 flow [2022-11-25 18:14:19,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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 18:14:19,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:19,558 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:14:19,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:19,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:19,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 55304, now seen corresponding path program 1 times [2022-11-25 18:14:19,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:19,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335374311] [2022-11-25 18:14:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:19,761 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 18:14:19,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:19,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:19,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:14:19,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:19,930 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-25 18:14:19,931 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 18:14:19,996 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 18:14:19,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:19,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:19,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335374311] [2022-11-25 18:14:19,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335374311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:19,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:19,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:14:19,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215589314] [2022-11-25 18:14:19,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:20,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 907 [2022-11-25 18:14:20,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 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 18:14:20,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:20,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 907 [2022-11-25 18:14:20,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:20,534 INFO L130 PetriNetUnfolder]: 178/296 cut-off events. [2022-11-25 18:14:20,534 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:14:20,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 296 events. 178/296 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 945 event pairs, 123 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 597. Up to 296 conditions per place. [2022-11-25 18:14:20,537 INFO L137 encePairwiseOnDemand]: 904/907 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-11-25 18:14:20,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 122 flow [2022-11-25 18:14:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:20,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:14:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-11-25 18:14:20,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41602352076442484 [2022-11-25 18:14:20,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-11-25 18:14:20,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-11-25 18:14:20,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:20,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-11-25 18:14:20,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 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 18:14:20,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:20,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:20,557 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 68 flow. Second operand 3 states and 1132 transitions. [2022-11-25 18:14:20,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 122 flow [2022-11-25 18:14:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:20,559 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 65 flow [2022-11-25 18:14:20,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2022-11-25 18:14:20,561 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -13 predicate places. [2022-11-25 18:14:20,561 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 65 flow [2022-11-25 18:14:20,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 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 18:14:20,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:20,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:14:20,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:20,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash 55305, now seen corresponding path program 1 times [2022-11-25 18:14:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:20,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567874970] [2022-11-25 18:14:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:20,778 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 18:14:20,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:20,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:20,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:20,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:14:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:14:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:14:20,941 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:14:20,941 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 18:14:20,959 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 10 treesize of output 8 [2022-11-25 18:14:20,999 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 18:14:20,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:20,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567874970] [2022-11-25 18:14:21,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567874970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:21,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:21,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:14:21,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252086772] [2022-11-25 18:14:21,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:21,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:21,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 907 [2022-11-25 18:14:21,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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 18:14:21,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:21,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 907 [2022-11-25 18:14:21,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:21,570 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2022-11-25 18:14:21,570 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:14:21,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 219 events. 126/219 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 652 event pairs, 85 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 443. Up to 219 conditions per place. [2022-11-25 18:14:21,573 INFO L137 encePairwiseOnDemand]: 904/907 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-11-25 18:14:21,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 115 flow [2022-11-25 18:14:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:14:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1139 transitions. [2022-11-25 18:14:21,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4185961043733921 [2022-11-25 18:14:21,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1139 transitions. [2022-11-25 18:14:21,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1139 transitions. [2022-11-25 18:14:21,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:21,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1139 transitions. [2022-11-25 18:14:21,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 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 18:14:21,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:21,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:21,611 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 65 flow. Second operand 3 states and 1139 transitions. [2022-11-25 18:14:21,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 115 flow [2022-11-25 18:14:21,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:21,613 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 62 flow [2022-11-25 18:14:21,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2022-11-25 18:14:21,615 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -14 predicate places. [2022-11-25 18:14:21,619 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 62 flow [2022-11-25 18:14:21,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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 18:14:21,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:21,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:14:21,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:14:21,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:21,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 54873, now seen corresponding path program 1 times [2022-11-25 18:14:21,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231596148] [2022-11-25 18:14:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:21,834 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 18:14:21,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:21,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:21,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:21,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:14:21,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:22,068 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:22,069 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:22,115 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 18:14:22,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:22,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:22,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231596148] [2022-11-25 18:14:22,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231596148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:22,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:22,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:14:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93757042] [2022-11-25 18:14:22,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:22,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:22,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:22,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 907 [2022-11-25 18:14:22,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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 18:14:22,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:22,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 907 [2022-11-25 18:14:22,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:22,897 INFO L130 PetriNetUnfolder]: 251/436 cut-off events. [2022-11-25 18:14:22,897 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:14:22,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 436 events. 251/436 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1693 event pairs, 170 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 884. Up to 220 conditions per place. [2022-11-25 18:14:22,900 INFO L137 encePairwiseOnDemand]: 904/907 looper letters, 50 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2022-11-25 18:14:22,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 52 transitions, 220 flow [2022-11-25 18:14:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:14:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1163 transitions. [2022-11-25 18:14:22,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42741639103270856 [2022-11-25 18:14:22,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1163 transitions. [2022-11-25 18:14:22,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1163 transitions. [2022-11-25 18:14:22,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:22,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1163 transitions. [2022-11-25 18:14:22,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.6666666666667) internal successors, (1163), 3 states have internal predecessors, (1163), 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 18:14:22,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:22,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:22,918 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 62 flow. Second operand 3 states and 1163 transitions. [2022-11-25 18:14:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 52 transitions, 220 flow [2022-11-25 18:14:22,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 52 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:22,921 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 73 flow [2022-11-25 18:14:22,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2022-11-25 18:14:22,923 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -12 predicate places. [2022-11-25 18:14:22,924 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 73 flow [2022-11-25 18:14:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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 18:14:22,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:22,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:14:22,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:23,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:23,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1712226, now seen corresponding path program 1 times [2022-11-25 18:14:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167218239] [2022-11-25 18:14:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:23,142 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 18:14:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:23,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:23,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:14:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:23,306 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:23,310 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:23,393 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 18:14:23,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:23,694 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 18:14:23,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:23,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167218239] [2022-11-25 18:14:23,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167218239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:23,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:14:23,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:14:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935023401] [2022-11-25 18:14:23,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:14:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:23,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:14:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:14:24,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 907 [2022-11-25 18:14:24,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 73 flow. Second operand has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 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 18:14:24,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:24,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 907 [2022-11-25 18:14:24,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:25,739 INFO L130 PetriNetUnfolder]: 378/657 cut-off events. [2022-11-25 18:14:25,739 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 18:14:25,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 657 events. 378/657 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2837 event pairs, 255 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 1340. Up to 219 conditions per place. [2022-11-25 18:14:25,743 INFO L137 encePairwiseOnDemand]: 903/907 looper letters, 74 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2022-11-25 18:14:25,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 81 transitions, 355 flow [2022-11-25 18:14:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:14:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:14:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2274 transitions. [2022-11-25 18:14:25,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4178610804851158 [2022-11-25 18:14:25,751 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2274 transitions. [2022-11-25 18:14:25,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2274 transitions. [2022-11-25 18:14:25,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:25,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2274 transitions. [2022-11-25 18:14:25,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 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 18:14:25,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 907.0) internal successors, (6349), 7 states have internal predecessors, (6349), 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 18:14:25,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 907.0) internal successors, (6349), 7 states have internal predecessors, (6349), 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 18:14:25,795 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 73 flow. Second operand 6 states and 2274 transitions. [2022-11-25 18:14:25,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 81 transitions, 355 flow [2022-11-25 18:14:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 81 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:25,797 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 125 flow [2022-11-25 18:14:25,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2022-11-25 18:14:25,798 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-11-25 18:14:25,799 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 125 flow [2022-11-25 18:14:25,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 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 18:14:25,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:25,800 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:14:25,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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)] Ended with exit code 0 [2022-11-25 18:14:26,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:26,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash 53184801, now seen corresponding path program 1 times [2022-11-25 18:14:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:26,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087547325] [2022-11-25 18:14:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:26,013 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 18:14:26,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:26,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:26,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:14:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:14:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:14:26,154 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:14:26,155 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 18:14:26,165 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 18:14:26,189 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 18:14:26,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:26,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:26,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087547325] [2022-11-25 18:14:26,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087547325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:26,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:26,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:14:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000679589] [2022-11-25 18:14:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:26,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:26,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:26,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 907 [2022-11-25 18:14:26,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 371.3333333333333) internal successors, (1114), 3 states have internal predecessors, (1114), 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 18:14:26,396 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:26,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 907 [2022-11-25 18:14:26,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:26,731 INFO L130 PetriNetUnfolder]: 345/594 cut-off events. [2022-11-25 18:14:26,731 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:14:26,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 594 events. 345/594 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2539 event pairs, 231 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 1234. Up to 594 conditions per place. [2022-11-25 18:14:26,735 INFO L137 encePairwiseOnDemand]: 904/907 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-11-25 18:14:26,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 31 transitions, 183 flow [2022-11-25 18:14:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:14:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1137 transitions. [2022-11-25 18:14:26,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4178610804851158 [2022-11-25 18:14:26,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1137 transitions. [2022-11-25 18:14:26,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1137 transitions. [2022-11-25 18:14:26,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:26,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1137 transitions. [2022-11-25 18:14:26,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.0) internal successors, (1137), 3 states have internal predecessors, (1137), 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 18:14:26,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:26,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:26,750 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 125 flow. Second operand 3 states and 1137 transitions. [2022-11-25 18:14:26,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 31 transitions, 183 flow [2022-11-25 18:14:26,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 31 transitions, 173 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:26,752 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 113 flow [2022-11-25 18:14:26,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2022-11-25 18:14:26,753 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2022-11-25 18:14:26,754 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 113 flow [2022-11-25 18:14:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.3333333333333) internal successors, (1114), 3 states have internal predecessors, (1114), 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 18:14:26,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:26,755 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:14:26,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:26,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 53184799, now seen corresponding path program 1 times [2022-11-25 18:14:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:26,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052773111] [2022-11-25 18:14:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:26,973 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 18:14:26,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:26,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:26,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:14:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:27,116 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 18:14:27,116 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-25 18:14:27,152 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 18:14:27,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:27,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052773111] [2022-11-25 18:14:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052773111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:27,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:27,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:14:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575617813] [2022-11-25 18:14:27,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:14:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:14:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:14:27,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 907 [2022-11-25 18:14:27,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 368.3333333333333) internal successors, (1105), 3 states have internal predecessors, (1105), 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 18:14:27,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:27,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 907 [2022-11-25 18:14:27,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:27,595 INFO L130 PetriNetUnfolder]: 312/531 cut-off events. [2022-11-25 18:14:27,595 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:14:27,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 531 events. 312/531 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2185 event pairs, 207 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1104. Up to 531 conditions per place. [2022-11-25 18:14:27,599 INFO L137 encePairwiseOnDemand]: 904/907 looper letters, 28 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-11-25 18:14:27,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 167 flow [2022-11-25 18:14:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:14:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:14:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1126 transitions. [2022-11-25 18:14:27,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41381844909959575 [2022-11-25 18:14:27,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1126 transitions. [2022-11-25 18:14:27,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1126 transitions. [2022-11-25 18:14:27,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:27,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1126 transitions. [2022-11-25 18:14:27,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.3333333333333) internal successors, (1126), 3 states have internal predecessors, (1126), 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 18:14:27,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:27,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 907.0) internal successors, (3628), 4 states have internal predecessors, (3628), 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 18:14:27,612 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 113 flow. Second operand 3 states and 1126 transitions. [2022-11-25 18:14:27,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 167 flow [2022-11-25 18:14:27,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:27,614 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 110 flow [2022-11-25 18:14:27,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2022-11-25 18:14:27,615 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:14:27,615 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 110 flow [2022-11-25 18:14:27,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 368.3333333333333) internal successors, (1105), 3 states have internal predecessors, (1105), 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 18:14:27,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:27,616 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:14:27,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:27,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:27,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 53184610, now seen corresponding path program 1 times [2022-11-25 18:14:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:27,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843575755] [2022-11-25 18:14:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:27,829 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 18:14:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:27,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:27,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:14:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:27,970 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:14:27,970 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:14:28,001 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 18:14:28,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:28,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:28,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843575755] [2022-11-25 18:14:28,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843575755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:28,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:28,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:14:28,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516771814] [2022-11-25 18:14:28,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:28,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:28,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:28,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:28,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:28,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 907 [2022-11-25 18:14:28,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:14:28,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:28,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 907 [2022-11-25 18:14:28,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:28,564 INFO L130 PetriNetUnfolder]: 213/366 cut-off events. [2022-11-25 18:14:28,564 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:14:28,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 366 events. 213/366 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1315 event pairs, 126 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 771. Up to 359 conditions per place. [2022-11-25 18:14:28,567 INFO L137 encePairwiseOnDemand]: 903/907 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-11-25 18:14:28,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 27 transitions, 160 flow [2022-11-25 18:14:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:14:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1447 transitions. [2022-11-25 18:14:28,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3988423373759647 [2022-11-25 18:14:28,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1447 transitions. [2022-11-25 18:14:28,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1447 transitions. [2022-11-25 18:14:28,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:28,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1447 transitions. [2022-11-25 18:14:28,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 361.75) internal successors, (1447), 4 states have internal predecessors, (1447), 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 18:14:28,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:28,594 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:28,595 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 110 flow. Second operand 4 states and 1447 transitions. [2022-11-25 18:14:28,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 27 transitions, 160 flow [2022-11-25 18:14:28,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:14:28,597 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 113 flow [2022-11-25 18:14:28,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2022-11-25 18:14:28,598 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:14:28,598 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 113 flow [2022-11-25 18:14:28,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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 18:14:28,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:28,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:14:28,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:14:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:28,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash 53184611, now seen corresponding path program 1 times [2022-11-25 18:14:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:28,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530954541] [2022-11-25 18:14:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:28,801 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 18:14:28,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:28,802 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:28,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:14:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:28,982 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:28,982 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:29,084 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 18:14:29,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:29,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530954541] [2022-11-25 18:14:29,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530954541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:29,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:29,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:14:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284946741] [2022-11-25 18:14:29,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:29,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:29,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 907 [2022-11-25 18:14:29,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 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 18:14:29,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:29,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 907 [2022-11-25 18:14:29,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:29,942 INFO L130 PetriNetUnfolder]: 387/660 cut-off events. [2022-11-25 18:14:29,943 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-25 18:14:29,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 660 events. 387/660 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2804 event pairs, 99 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 1376. Up to 406 conditions per place. [2022-11-25 18:14:29,947 INFO L137 encePairwiseOnDemand]: 902/907 looper letters, 36 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2022-11-25 18:14:29,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 230 flow [2022-11-25 18:14:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:14:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1497 transitions. [2022-11-25 18:14:29,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41262403528114666 [2022-11-25 18:14:29,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1497 transitions. [2022-11-25 18:14:29,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1497 transitions. [2022-11-25 18:14:29,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:29,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1497 transitions. [2022-11-25 18:14:29,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 374.25) internal successors, (1497), 4 states have internal predecessors, (1497), 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 18:14:29,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:29,965 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:29,965 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 113 flow. Second operand 4 states and 1497 transitions. [2022-11-25 18:14:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 230 flow [2022-11-25 18:14:29,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:14:29,970 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 135 flow [2022-11-25 18:14:29,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-11-25 18:14:29,972 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-11-25 18:14:29,972 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 135 flow [2022-11-25 18:14:29,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 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 18:14:29,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:29,973 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:14:29,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:30,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:30,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash -519597927, now seen corresponding path program 2 times [2022-11-25 18:14:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:30,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25839743] [2022-11-25 18:14:30,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:14:30,186 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 18:14:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:30,187 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:30,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:30,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:14:30,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:14:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:14:30,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:30,373 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:30,373 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:30,589 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 18:14:30,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:31,503 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 18:14:31,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25839743] [2022-11-25 18:14:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25839743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:31,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:14:31,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:14:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864215900] [2022-11-25 18:14:31,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:31,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:14:31,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:14:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:14:36,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 907 [2022-11-25 18:14:36,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 135 flow. Second operand has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 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 18:14:36,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:36,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 907 [2022-11-25 18:14:36,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:41,906 INFO L130 PetriNetUnfolder]: 1282/2184 cut-off events. [2022-11-25 18:14:41,906 INFO L131 PetriNetUnfolder]: For 373/373 co-relation queries the response was YES. [2022-11-25 18:14:41,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5114 conditions, 2184 events. 1282/2184 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11019 event pairs, 820 based on Foata normal form. 6/1430 useless extension candidates. Maximal degree in co-relation 5095. Up to 401 conditions per place. [2022-11-25 18:14:41,925 INFO L137 encePairwiseOnDemand]: 903/907 looper letters, 202 selfloop transitions, 12 changer transitions 0/214 dead transitions. [2022-11-25 18:14:41,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 214 transitions, 1165 flow [2022-11-25 18:14:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:14:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:14:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4592 transitions. [2022-11-25 18:14:41,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4219037118706358 [2022-11-25 18:14:41,940 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4592 transitions. [2022-11-25 18:14:41,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4592 transitions. [2022-11-25 18:14:41,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:41,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4592 transitions. [2022-11-25 18:14:41,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 382.6666666666667) internal successors, (4592), 12 states have internal predecessors, (4592), 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 18:14:41,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 907.0) internal successors, (11791), 13 states have internal predecessors, (11791), 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 18:14:41,974 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 907.0) internal successors, (11791), 13 states have internal predecessors, (11791), 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 18:14:41,975 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 135 flow. Second operand 12 states and 4592 transitions. [2022-11-25 18:14:41,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 214 transitions, 1165 flow [2022-11-25 18:14:41,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 214 transitions, 1132 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:14:41,983 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 229 flow [2022-11-25 18:14:41,984 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2022-11-25 18:14:41,985 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-11-25 18:14:41,985 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 229 flow [2022-11-25 18:14:41,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 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 18:14:41,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:41,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:14:42,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:42,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:42,206 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash -428976484, now seen corresponding path program 1 times [2022-11-25 18:14:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:42,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222399210] [2022-11-25 18:14:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:42,207 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 18:14:42,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:42,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:42,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:14:42,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:42,376 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:42,377 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:42,490 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 18:14:42,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:42,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222399210] [2022-11-25 18:14:42,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222399210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:42,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:42,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:14:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343889172] [2022-11-25 18:14:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:42,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:43,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 907 [2022-11-25 18:14:43,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 366.5) internal successors, (1466), 4 states have internal predecessors, (1466), 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 18:14:43,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:43,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 907 [2022-11-25 18:14:43,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:44,187 INFO L130 PetriNetUnfolder]: 1982/3364 cut-off events. [2022-11-25 18:14:44,187 INFO L131 PetriNetUnfolder]: For 611/611 co-relation queries the response was YES. [2022-11-25 18:14:44,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 3364 events. 1982/3364 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18866 event pairs, 530 based on Foata normal form. 0/2224 useless extension candidates. Maximal degree in co-relation 7526. Up to 1983 conditions per place. [2022-11-25 18:14:44,212 INFO L137 encePairwiseOnDemand]: 903/907 looper letters, 45 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2022-11-25 18:14:44,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 373 flow [2022-11-25 18:14:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:14:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1495 transitions. [2022-11-25 18:14:44,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41207276736493936 [2022-11-25 18:14:44,217 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1495 transitions. [2022-11-25 18:14:44,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1495 transitions. [2022-11-25 18:14:44,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:44,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1495 transitions. [2022-11-25 18:14:44,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 373.75) internal successors, (1495), 4 states have internal predecessors, (1495), 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 18:14:44,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:44,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:44,230 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 229 flow. Second operand 4 states and 1495 transitions. [2022-11-25 18:14:44,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 373 flow [2022-11-25 18:14:44,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 51 transitions, 348 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 18:14:44,234 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 227 flow [2022-11-25 18:14:44,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2022-11-25 18:14:44,235 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-11-25 18:14:44,236 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 227 flow [2022-11-25 18:14:44,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 366.5) internal successors, (1466), 4 states have internal predecessors, (1466), 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 18:14:44,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:44,236 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:14:44,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:44,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:44,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -428881495, now seen corresponding path program 1 times [2022-11-25 18:14:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:44,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026379161] [2022-11-25 18:14:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:44,449 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 18:14:44,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:44,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:44,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:44,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:14:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:44,662 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:44,662 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:44,792 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 18:14:44,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:14:44,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026379161] [2022-11-25 18:14:44,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026379161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:14:44,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:14:44,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:14:44,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748264241] [2022-11-25 18:14:44,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:14:44,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:14:44,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:14:44,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:14:45,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 907 [2022-11-25 18:14:45,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 360.5) internal successors, (1442), 4 states have internal predecessors, (1442), 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 18:14:45,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:45,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 907 [2022-11-25 18:14:45,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:46,417 INFO L130 PetriNetUnfolder]: 1793/3057 cut-off events. [2022-11-25 18:14:46,417 INFO L131 PetriNetUnfolder]: For 851/851 co-relation queries the response was YES. [2022-11-25 18:14:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 3057 events. 1793/3057 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16845 event pairs, 1269 based on Foata normal form. 6/2433 useless extension candidates. Maximal degree in co-relation 7630. Up to 3029 conditions per place. [2022-11-25 18:14:46,446 INFO L137 encePairwiseOnDemand]: 901/907 looper letters, 45 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2022-11-25 18:14:46,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 359 flow [2022-11-25 18:14:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:14:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:14:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1472 transitions. [2022-11-25 18:14:46,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40573318632855565 [2022-11-25 18:14:46,454 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1472 transitions. [2022-11-25 18:14:46,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1472 transitions. [2022-11-25 18:14:46,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:46,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1472 transitions. [2022-11-25 18:14:46,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 368.0) internal successors, (1472), 4 states have internal predecessors, (1472), 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 18:14:46,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:46,468 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 907.0) internal successors, (4535), 5 states have internal predecessors, (4535), 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 18:14:46,468 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 227 flow. Second operand 4 states and 1472 transitions. [2022-11-25 18:14:46,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 359 flow [2022-11-25 18:14:46,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 351 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:14:46,472 INFO L231 Difference]: Finished difference. Result has 59 places, 38 transitions, 249 flow [2022-11-25 18:14:46,473 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=59, PETRI_TRANSITIONS=38} [2022-11-25 18:14:46,474 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2022-11-25 18:14:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 38 transitions, 249 flow [2022-11-25 18:14:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 360.5) internal successors, (1442), 4 states have internal predecessors, (1442), 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 18:14:46,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:46,476 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:46,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:14:46,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:46,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1163061042, now seen corresponding path program 1 times [2022-11-25 18:14:46,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:46,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261114540] [2022-11-25 18:14:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:46,689 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 18:14:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:46,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:46,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:46,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:14:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:46,892 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:14:46,893 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:14:47,080 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 18:14:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:47,735 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 18:14:47,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261114540] [2022-11-25 18:14:47,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261114540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:47,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:14:47,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:14:47,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542329653] [2022-11-25 18:14:47,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:47,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:14:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:47,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:14:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:14:50,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 907 [2022-11-25 18:14:50,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 38 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 354.4) internal successors, (3544), 10 states have internal predecessors, (3544), 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 18:14:50,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:50,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 907 [2022-11-25 18:14:50,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:53,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 18:14:55,354 INFO L130 PetriNetUnfolder]: 3728/6216 cut-off events. [2022-11-25 18:14:55,354 INFO L131 PetriNetUnfolder]: For 1500/1500 co-relation queries the response was YES. [2022-11-25 18:14:55,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16369 conditions, 6216 events. 3728/6216 cut-off events. For 1500/1500 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 37666 event pairs, 90 based on Foata normal form. 378/5658 useless extension candidates. Maximal degree in co-relation 16339. Up to 1477 conditions per place. [2022-11-25 18:14:55,390 INFO L137 encePairwiseOnDemand]: 898/907 looper letters, 91 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2022-11-25 18:14:55,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 707 flow [2022-11-25 18:14:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:14:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:14:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3273 transitions. [2022-11-25 18:14:55,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4009555310547593 [2022-11-25 18:14:55,400 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3273 transitions. [2022-11-25 18:14:55,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3273 transitions. [2022-11-25 18:14:55,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:55,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3273 transitions. [2022-11-25 18:14:55,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 363.6666666666667) internal successors, (3273), 9 states have internal predecessors, (3273), 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 18:14:55,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 907.0) internal successors, (9070), 10 states have internal predecessors, (9070), 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 18:14:55,419 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 907.0) internal successors, (9070), 10 states have internal predecessors, (9070), 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 18:14:55,419 INFO L175 Difference]: Start difference. First operand has 59 places, 38 transitions, 249 flow. Second operand 9 states and 3273 transitions. [2022-11-25 18:14:55,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 707 flow [2022-11-25 18:14:55,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 697 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 18:14:55,424 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 384 flow [2022-11-25 18:14:55,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=384, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2022-11-25 18:14:55,425 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2022-11-25 18:14:55,425 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 384 flow [2022-11-25 18:14:55,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 354.4) internal successors, (3544), 10 states have internal predecessors, (3544), 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 18:14:55,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:14:55,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:14:55,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:55,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:55,638 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:14:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:14:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1692223394, now seen corresponding path program 1 times [2022-11-25 18:14:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:14:55,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077969357] [2022-11-25 18:14:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:14:55,639 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 18:14:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:14:55,641 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:55,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:14:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:14:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:14:55,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:14:56,055 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 18:14:56,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:56,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:14:56,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 807 treesize of output 387 [2022-11-25 18:14:56,383 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 387 treesize of output 383 [2022-11-25 18:14:56,395 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 383 treesize of output 379 [2022-11-25 18:14:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:57,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:14:57,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077969357] [2022-11-25 18:14:57,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077969357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:57,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:14:57,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:14:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294048617] [2022-11-25 18:14:57,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:57,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:14:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:14:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:14:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:14:58,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 907 [2022-11-25 18:14:58,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 384 flow. Second operand has 10 states, 10 states have (on average 358.6) internal successors, (3586), 10 states have internal predecessors, (3586), 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 18:14:58,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:58,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 907 [2022-11-25 18:14:58,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:00,657 INFO L130 PetriNetUnfolder]: 3538/5930 cut-off events. [2022-11-25 18:15:00,657 INFO L131 PetriNetUnfolder]: For 9679/9679 co-relation queries the response was YES. [2022-11-25 18:15:00,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21377 conditions, 5930 events. 3538/5930 cut-off events. For 9679/9679 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 36988 event pairs, 1332 based on Foata normal form. 88/5146 useless extension candidates. Maximal degree in co-relation 21341. Up to 3489 conditions per place. [2022-11-25 18:15:00,713 INFO L137 encePairwiseOnDemand]: 900/907 looper letters, 116 selfloop transitions, 13 changer transitions 0/129 dead transitions. [2022-11-25 18:15:00,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1147 flow [2022-11-25 18:15:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:15:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:15:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3642 transitions. [2022-11-25 18:15:00,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40154355016538035 [2022-11-25 18:15:00,724 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3642 transitions. [2022-11-25 18:15:00,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3642 transitions. [2022-11-25 18:15:00,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:00,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3642 transitions. [2022-11-25 18:15:00,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 364.2) internal successors, (3642), 10 states have internal predecessors, (3642), 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 18:15:00,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 907.0) internal successors, (9977), 11 states have internal predecessors, (9977), 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 18:15:00,744 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 907.0) internal successors, (9977), 11 states have internal predecessors, (9977), 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 18:15:00,745 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 384 flow. Second operand 10 states and 3642 transitions. [2022-11-25 18:15:00,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1147 flow [2022-11-25 18:15:00,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 1084 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:00,770 INFO L231 Difference]: Finished difference. Result has 81 places, 53 transitions, 448 flow [2022-11-25 18:15:00,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=81, PETRI_TRANSITIONS=53} [2022-11-25 18:15:00,771 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2022-11-25 18:15:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 53 transitions, 448 flow [2022-11-25 18:15:00,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 358.6) internal successors, (3586), 10 states have internal predecessors, (3586), 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 18:15:00,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:00,772 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:00,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:00,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:00,985 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:15:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1754323221, now seen corresponding path program 2 times [2022-11-25 18:15:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:15:00,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567398928] [2022-11-25 18:15:00,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:00,986 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 18:15:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:15:00,987 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:00,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:01,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:01,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:01,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:15:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:01,243 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:15:01,243 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:15:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:01,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:15:01,680 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 242 treesize of output 88 [2022-11-25 18:15:01,689 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 7 treesize of output 5 [2022-11-25 18:15:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:01,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:02,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:15:02,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 807 treesize of output 387 [2022-11-25 18:15:02,088 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 387 treesize of output 383 [2022-11-25 18:15:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:04,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:15:04,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567398928] [2022-11-25 18:15:04,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567398928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:04,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:15:04,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:15:04,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832979677] [2022-11-25 18:15:04,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:04,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:15:04,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:15:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:15:04,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:15:13,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 907 [2022-11-25 18:15:13,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 53 transitions, 448 flow. Second operand has 12 states, 12 states have (on average 348.5) internal successors, (4182), 12 states have internal predecessors, (4182), 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 18:15:13,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:13,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 907 [2022-11-25 18:15:13,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:19,563 INFO L130 PetriNetUnfolder]: 4446/7414 cut-off events. [2022-11-25 18:15:19,563 INFO L131 PetriNetUnfolder]: For 11672/11672 co-relation queries the response was YES. [2022-11-25 18:15:19,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29012 conditions, 7414 events. 4446/7414 cut-off events. For 11672/11672 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 47152 event pairs, 1650 based on Foata normal form. 0/6378 useless extension candidates. Maximal degree in co-relation 28972. Up to 2288 conditions per place. [2022-11-25 18:15:19,633 INFO L137 encePairwiseOnDemand]: 901/907 looper letters, 285 selfloop transitions, 24 changer transitions 0/309 dead transitions. [2022-11-25 18:15:19,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 309 transitions, 2561 flow [2022-11-25 18:15:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:15:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:15:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5736 transitions. [2022-11-25 18:15:19,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3952590959206174 [2022-11-25 18:15:19,648 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5736 transitions. [2022-11-25 18:15:19,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5736 transitions. [2022-11-25 18:15:19,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:19,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5736 transitions. [2022-11-25 18:15:19,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 358.5) internal successors, (5736), 16 states have internal predecessors, (5736), 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 18:15:19,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 907.0) internal successors, (15419), 17 states have internal predecessors, (15419), 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 18:15:19,680 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 907.0) internal successors, (15419), 17 states have internal predecessors, (15419), 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 18:15:19,680 INFO L175 Difference]: Start difference. First operand has 81 places, 53 transitions, 448 flow. Second operand 16 states and 5736 transitions. [2022-11-25 18:15:19,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 309 transitions, 2561 flow [2022-11-25 18:15:19,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 309 transitions, 2539 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 18:15:19,722 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 622 flow [2022-11-25 18:15:19,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=622, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2022-11-25 18:15:19,723 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2022-11-25 18:15:19,723 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 622 flow [2022-11-25 18:15:19,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 348.5) internal successors, (4182), 12 states have internal predecessors, (4182), 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 18:15:19,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:19,724 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:19,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:19,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:19,938 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:15:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1450569116, now seen corresponding path program 3 times [2022-11-25 18:15:19,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:15:19,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980371793] [2022-11-25 18:15:19,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:15:19,939 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 18:15:19,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:15:19,940 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:19,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:15:20,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:15:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:15:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:20,198 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:15:20,199 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:15:20,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 810 treesize of output 346 [2022-11-25 18:15:21,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:15:21,050 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 366 treesize of output 364 [2022-11-25 18:15:21,116 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 7 treesize of output 5 [2022-11-25 18:15:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:23,443 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-25 18:15:23,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1251 treesize of output 586 [2022-11-25 18:15:23,454 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 586 treesize of output 578 [2022-11-25 18:15:59,721 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification. DAG size of input: 236 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:16:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:00,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:16:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980371793] [2022-11-25 18:16:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980371793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:16:00,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-25 18:16:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113432491] [2022-11-25 18:16:00,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:16:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:16:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:16:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:16:16,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 907 [2022-11-25 18:16:16,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 622 flow. Second operand has 14 states, 14 states have (on average 333.42857142857144) internal successors, (4668), 14 states have internal predecessors, (4668), 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 18:16:16,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:16,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 907 [2022-11-25 18:16:16,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:27,763 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 [1] [2022-11-25 18:16:33,711 INFO L130 PetriNetUnfolder]: 3852/6480 cut-off events. [2022-11-25 18:16:33,711 INFO L131 PetriNetUnfolder]: For 14150/14150 co-relation queries the response was YES. [2022-11-25 18:16:33,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26627 conditions, 6480 events. 3852/6480 cut-off events. For 14150/14150 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 41572 event pairs, 957 based on Foata normal form. 132/5734 useless extension candidates. Maximal degree in co-relation 26588. Up to 2599 conditions per place. [2022-11-25 18:16:33,752 INFO L137 encePairwiseOnDemand]: 899/907 looper letters, 242 selfloop transitions, 18 changer transitions 0/260 dead transitions. [2022-11-25 18:16:33,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 260 transitions, 2277 flow [2022-11-25 18:16:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:16:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:16:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 5446 transitions. [2022-11-25 18:16:33,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37527563395810365 [2022-11-25 18:16:33,764 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 5446 transitions. [2022-11-25 18:16:33,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 5446 transitions. [2022-11-25 18:16:33,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:33,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 5446 transitions. [2022-11-25 18:16:33,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 340.375) internal successors, (5446), 16 states have internal predecessors, (5446), 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 18:16:33,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 907.0) internal successors, (15419), 17 states have internal predecessors, (15419), 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 18:16:33,791 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 907.0) internal successors, (15419), 17 states have internal predecessors, (15419), 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 18:16:33,792 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 622 flow. Second operand 16 states and 5446 transitions. [2022-11-25 18:16:33,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 260 transitions, 2277 flow [2022-11-25 18:16:33,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 260 transitions, 2199 flow, removed 27 selfloop flow, removed 9 redundant places. [2022-11-25 18:16:33,846 INFO L231 Difference]: Finished difference. Result has 102 places, 66 transitions, 580 flow [2022-11-25 18:16:33,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=580, PETRI_PLACES=102, PETRI_TRANSITIONS=66} [2022-11-25 18:16:33,847 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2022-11-25 18:16:33,847 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 66 transitions, 580 flow [2022-11-25 18:16:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 333.42857142857144) internal successors, (4668), 14 states have internal predecessors, (4668), 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 18:16:33,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:33,849 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:33,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:16:34,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:16:34,062 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:16:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash 739057317, now seen corresponding path program 4 times [2022-11-25 18:16:34,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:16:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598814284] [2022-11-25 18:16:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:16:34,063 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 18:16:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:16:34,064 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:16:34,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:16:34,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:16:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 18:16:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:34,356 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:16:34,356 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:16:35,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:35,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 810 treesize of output 346 [2022-11-25 18:16:35,399 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 7 treesize of output 5 [2022-11-25 18:16:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:35,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:38,526 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-25 18:16:38,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1287 treesize of output 622 [2022-11-25 18:16:38,540 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 622 treesize of output 614 [2022-11-25 18:17:27,734 WARN L233 SmtUtils]: Spent 15.18s on a formula simplification. DAG size of input: 212 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:17:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:17:30,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:17:30,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598814284] [2022-11-25 18:17:30,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598814284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:17:30,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:17:30,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-25 18:17:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750357893] [2022-11-25 18:17:30,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:17:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:17:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:17:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:17:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:17:54,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 907 [2022-11-25 18:17:54,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 66 transitions, 580 flow. Second operand has 16 states, 16 states have (on average 331.375) internal successors, (5302), 16 states have internal predecessors, (5302), 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 18:17:54,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:17:54,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 907 [2022-11-25 18:17:54,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:18:38,102 INFO L130 PetriNetUnfolder]: 5340/8772 cut-off events. [2022-11-25 18:18:38,102 INFO L131 PetriNetUnfolder]: For 17449/17449 co-relation queries the response was YES. [2022-11-25 18:18:38,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37276 conditions, 8772 events. 5340/8772 cut-off events. For 17449/17449 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 56631 event pairs, 578 based on Foata normal form. 308/8340 useless extension candidates. Maximal degree in co-relation 37236. Up to 1892 conditions per place. [2022-11-25 18:18:38,163 INFO L137 encePairwiseOnDemand]: 899/907 looper letters, 535 selfloop transitions, 54 changer transitions 0/589 dead transitions. [2022-11-25 18:18:38,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 589 transitions, 4933 flow [2022-11-25 18:18:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 18:18:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 18:18:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 10882 transitions. [2022-11-25 18:18:38,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3749310915104741 [2022-11-25 18:18:38,184 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 10882 transitions. [2022-11-25 18:18:38,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 10882 transitions. [2022-11-25 18:18:38,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:18:38,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 10882 transitions. [2022-11-25 18:18:38,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 340.0625) internal successors, (10882), 32 states have internal predecessors, (10882), 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 18:18:38,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 907.0) internal successors, (29931), 33 states have internal predecessors, (29931), 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 18:18:38,231 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 907.0) internal successors, (29931), 33 states have internal predecessors, (29931), 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 18:18:38,231 INFO L175 Difference]: Start difference. First operand has 102 places, 66 transitions, 580 flow. Second operand 32 states and 10882 transitions. [2022-11-25 18:18:38,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 589 transitions, 4933 flow [2022-11-25 18:18:38,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 589 transitions, 4911 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 18:18:38,270 INFO L231 Difference]: Finished difference. Result has 132 places, 98 transitions, 971 flow [2022-11-25 18:18:38,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=971, PETRI_PLACES=132, PETRI_TRANSITIONS=98} [2022-11-25 18:18:38,271 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2022-11-25 18:18:38,271 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 98 transitions, 971 flow [2022-11-25 18:18:38,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 331.375) internal successors, (5302), 16 states have internal predecessors, (5302), 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 18:18:38,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:18:38,272 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:18:38,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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)] Ended with exit code 0 [2022-11-25 18:18:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:38,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:18:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:18:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1585618417, now seen corresponding path program 1 times [2022-11-25 18:18:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:18:38,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121491304] [2022-11-25 18:18:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:18:38,487 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 18:18:38,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:18:38,488 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:38,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:18:38,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:18:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:18:38,897 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 18:18:38,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:18:38,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:18:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121491304] [2022-11-25 18:18:38,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121491304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:18:38,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:18:38,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:18:38,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498800647] [2022-11-25 18:18:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:18:38,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:18:38,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:18:38,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:18:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:18:39,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 907 [2022-11-25 18:18:39,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 98 transitions, 971 flow. Second operand has 5 states, 5 states have (on average 364.4) internal successors, (1822), 5 states have internal predecessors, (1822), 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 18:18:39,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:18:39,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 907 [2022-11-25 18:18:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:18:42,188 INFO L130 PetriNetUnfolder]: 7341/11661 cut-off events. [2022-11-25 18:18:42,188 INFO L131 PetriNetUnfolder]: For 27917/27917 co-relation queries the response was YES. [2022-11-25 18:18:42,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55814 conditions, 11661 events. 7341/11661 cut-off events. For 27917/27917 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 74049 event pairs, 1742 based on Foata normal form. 8/10613 useless extension candidates. Maximal degree in co-relation 55768. Up to 9016 conditions per place. [2022-11-25 18:18:42,265 INFO L137 encePairwiseOnDemand]: 900/907 looper letters, 121 selfloop transitions, 51 changer transitions 4/176 dead transitions. [2022-11-25 18:18:42,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1936 flow [2022-11-25 18:18:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:18:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:18:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1868 transitions. [2022-11-25 18:18:42,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4119073869900772 [2022-11-25 18:18:42,268 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1868 transitions. [2022-11-25 18:18:42,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1868 transitions. [2022-11-25 18:18:42,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:18:42,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1868 transitions. [2022-11-25 18:18:42,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 373.6) internal successors, (1868), 5 states have internal predecessors, (1868), 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 18:18:42,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 907.0) internal successors, (5442), 6 states have internal predecessors, (5442), 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 18:18:42,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 907.0) internal successors, (5442), 6 states have internal predecessors, (5442), 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 18:18:42,277 INFO L175 Difference]: Start difference. First operand has 132 places, 98 transitions, 971 flow. Second operand 5 states and 1868 transitions. [2022-11-25 18:18:42,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 176 transitions, 1936 flow [2022-11-25 18:18:42,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 176 transitions, 1766 flow, removed 32 selfloop flow, removed 14 redundant places. [2022-11-25 18:18:42,587 INFO L231 Difference]: Finished difference. Result has 125 places, 131 transitions, 1343 flow [2022-11-25 18:18:42,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=907, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1343, PETRI_PLACES=125, PETRI_TRANSITIONS=131} [2022-11-25 18:18:42,587 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2022-11-25 18:18:42,588 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 131 transitions, 1343 flow [2022-11-25 18:18:42,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 364.4) internal successors, (1822), 5 states have internal predecessors, (1822), 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 18:18:42,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:18:42,588 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-11-25 18:18:42,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:42,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:42,789 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 18:18:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:18:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1435954466, now seen corresponding path program 5 times [2022-11-25 18:18:42,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:18:42,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744110236] [2022-11-25 18:18:42,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:18:42,789 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 18:18:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:18:42,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:42,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67fe7af4-0f26-4a47-a45d-4f8fecd08999/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 18:18:43,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:18:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:18:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:18:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:18:43,252 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 18:18:43,252 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 18:18:45,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:18:45,526 INFO L321 Elim1Store]: treesize reduction 332, result has 0.3 percent of original size [2022-11-25 18:18:45,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 1359 treesize of output 523 [2022-11-25 18:18:46,941 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 7 treesize of output 5 [2022-11-25 18:18:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:18:47,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:04,615 INFO L321 Elim1Store]: treesize reduction 440, result has 0.2 percent of original size [2022-11-25 18:19:04,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 2791 treesize of output 1134 [2022-11-25 18:19:04,630 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 1134 treesize of output 1122