./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8 --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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- 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-2329fc7 [2022-12-13 11:55:55,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:55:55,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:55:55,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:55:55,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:55:55,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:55:55,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:55:55,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:55:55,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:55:55,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:55:55,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:55:55,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:55:55,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:55:55,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:55:55,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:55:55,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:55:55,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:55:55,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:55:55,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:55:55,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:55:55,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:55:55,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:55:55,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:55:55,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:55:55,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:55:55,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:55:55,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:55:55,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:55:55,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:55:55,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:55:55,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:55:55,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:55:55,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:55:55,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:55:55,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:55:55,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:55:55,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:55:55,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:55:55,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:55:55,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:55:55,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:55:55,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:55:55,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:55:55,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:55:55,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:55:55,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:55:55,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:55:55,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:55:55,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:55:55,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:55:55,083 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:55:55,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:55:55,084 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:55:55,084 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:55:55,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:55:55,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:55:55,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:55:55,085 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:55:55,085 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:55:55,085 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:55:55,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:55:55,085 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:55:55,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:55:55,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:55:55,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:55:55,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:55:55,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:55:55,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:55:55,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:55:55,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:55:55,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:55:55,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:55:55,087 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:55:55,088 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:55:55,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:55:55,088 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:55:55,088 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_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-12-13 11:55:55,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:55:55,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:55:55,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:55:55,305 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:55:55,305 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:55:55,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-13 11:55:57,844 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:55:58,023 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:55:58,024 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-13 11:55:58,028 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data/3c857bcca/b8be22212dea472085b52d59f2f947d4/FLAGa89003124 [2022-12-13 11:55:58,421 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data/3c857bcca/b8be22212dea472085b52d59f2f947d4 [2022-12-13 11:55:58,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:55:58,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:55:58,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:55:58,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:55:58,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:55:58,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:55:58" (1/1) ... [2022-12-13 11:55:58,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d94a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:58, skipping insertion in model container [2022-12-13 11:55:58,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:55:58" (1/1) ... [2022-12-13 11:55:58,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:55:58,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:55:58,568 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,569 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,569 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,569 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,572 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,577 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,578 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,581 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:55:58,584 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:55:58,591 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-13 11:55:58,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:55:58,611 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) [2022-12-13 11:55:58,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b6879e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:55:58, skipping insertion in model container [2022-12-13 11:55:58,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:55:58,612 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:55:58,614 INFO L158 Benchmark]: Toolchain (without parser) took 188.98ms. Allocated memory is still 119.5MB. Free memory was 86.3MB in the beginning and 75.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:55:58,614 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:55:58,615 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.40ms. Allocated memory is still 119.5MB. Free memory was 86.0MB in the beginning and 75.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:55:58,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.40ms. Allocated memory is still 119.5MB. Free memory was 86.0MB in the beginning and 75.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: 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_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8 --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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- 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-2329fc7 [2022-12-13 11:55:59,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:55:59,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:56:00,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:56:00,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:56:00,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:56:00,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:56:00,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:56:00,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:56:00,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:56:00,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:56:00,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:56:00,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:56:00,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:56:00,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:56:00,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:56:00,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:56:00,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:56:00,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:56:00,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:56:00,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:56:00,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:56:00,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:56:00,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:56:00,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:56:00,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:56:00,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:56:00,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:56:00,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:56:00,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:56:00,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:56:00,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:56:00,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:56:00,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:56:00,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:56:00,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:56:00,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:56:00,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:56:00,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:56:00,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:56:00,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:56:00,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:56:00,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:56:00,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:56:00,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:56:00,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:56:00,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:56:00,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:56:00,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:56:00,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:56:00,062 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:56:00,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:56:00,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:56:00,063 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:56:00,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:56:00,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:56:00,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:56:00,063 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:56:00,063 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:56:00,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:56:00,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:56:00,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:56:00,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:56:00,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:56:00,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:56:00,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:56:00,066 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:56:00,066 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:56:00,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:56:00,066 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:56:00,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:56:00,067 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:56:00,067 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:56:00,067 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_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-12-13 11:56:00,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:56:00,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:56:00,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:56:00,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:56:00,321 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:56:00,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-13 11:56:02,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:56:03,047 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:56:03,047 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-13 11:56:03,053 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data/a560ad7a7/6352db87127549e0a6875343d1a1e662/FLAGc0457ded4 [2022-12-13 11:56:03,068 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/data/a560ad7a7/6352db87127549e0a6875343d1a1e662 [2022-12-13 11:56:03,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:56:03,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:56:03,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:56:03,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:56:03,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:56:03,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d481780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03, skipping insertion in model container [2022-12-13 11:56:03,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:56:03,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:56:03,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,258 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,271 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_49cc2102-2352-47ca-9a53-372d5a93edf9/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-13 11:56:03,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:56:03,292 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:56:03,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:56:03,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,302 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,304 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,304 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,305 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,305 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,307 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,314 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_49cc2102-2352-47ca-9a53-372d5a93edf9/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-13 11:56:03,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:56:03,320 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:56:03,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,340 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:56:03,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:56:03,349 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_49cc2102-2352-47ca-9a53-372d5a93edf9/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-13 11:56:03,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:56:03,369 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:56:03,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03 WrapperNode [2022-12-13 11:56:03,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:56:03,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:56:03,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:56:03,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:56:03,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,412 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-12-13 11:56:03,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:56:03,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:56:03,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:56:03,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:56:03,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:56:03,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:56:03,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:56:03,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:56:03,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (1/1) ... [2022-12-13 11:56:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:56:03,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:03,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:56:03,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:56:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:56:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:56:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:56:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:56:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:56:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:56:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 11:56:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:56:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:56:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:56:03,509 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:56:03,602 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:56:03,604 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:56:04,105 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:56:04,210 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:56:04,210 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 11:56:04,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:56:04 BoogieIcfgContainer [2022-12-13 11:56:04,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:56:04,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:56:04,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:56:04,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:56:04,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:56:03" (1/3) ... [2022-12-13 11:56:04,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a2b2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:56:04, skipping insertion in model container [2022-12-13 11:56:04,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:56:03" (2/3) ... [2022-12-13 11:56:04,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a2b2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:56:04, skipping insertion in model container [2022-12-13 11:56:04,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:56:04" (3/3) ... [2022-12-13 11:56:04,220 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2022-12-13 11:56:04,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:56:04,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-13 11:56:04,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:56:04,311 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 11:56:04,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-12-13 11:56:04,397 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-12-13 11:56:04,397 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 11:56:04,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-13 11:56:04,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 210 transitions, 452 flow [2022-12-13 11:56:04,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 201 transitions, 426 flow [2022-12-13 11:56:04,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:56:04,416 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 201 transitions, 426 flow [2022-12-13 11:56:04,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 201 transitions, 426 flow [2022-12-13 11:56:04,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 201 transitions, 426 flow [2022-12-13 11:56:04,447 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-12-13 11:56:04,448 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 11:56:04,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 201 events. 12/201 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 285 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-13 11:56:04,450 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-12-13 11:56:31,658 INFO L134 LiptonReduction]: Checked pairs total: 8066 [2022-12-13 11:56:31,658 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-12-13 11:56:31,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:56:31,679 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;@5dd9610c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:56:31,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-12-13 11:56:31,682 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:56:31,682 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:31,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:31,683 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:56:31,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 27413, now seen corresponding path program 1 times [2022-12-13 11:56:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:31,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866152541] [2022-12-13 11:56:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:31,698 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 [2022-12-13 11:56:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:31,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:31,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:56:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:31,936 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 11:56:31,937 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 11:56:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:31,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:56:31,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866152541] [2022-12-13 11:56:31,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866152541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:31,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:31,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343479299] [2022-12-13 11:56:31,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:31,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:32,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:32,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2022-12-13 11:56:32,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:32,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:32,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2022-12-13 11:56:32,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:33,515 INFO L130 PetriNetUnfolder]: 9120/11751 cut-off events. [2022-12-13 11:56:33,516 INFO L131 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2022-12-13 11:56:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 11751 events. 9120/11751 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 55809 event pairs, 6418 based on Foata normal form. 0/5116 useless extension candidates. Maximal degree in co-relation 21662. Up to 11725 conditions per place. [2022-12-13 11:56:33,594 INFO L137 encePairwiseOnDemand]: 398/409 looper letters, 52 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-12-13 11:56:33,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 246 flow [2022-12-13 11:56:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2022-12-13 11:56:33,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4718826405867971 [2022-12-13 11:56:33,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2022-12-13 11:56:33,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2022-12-13 11:56:33,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:33,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2022-12-13 11:56:33,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:33,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:33,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:33,628 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 160 flow. Second operand 3 states and 579 transitions. [2022-12-13 11:56:33,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 246 flow [2022-12-13 11:56:33,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 11:56:33,669 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 126 flow [2022-12-13 11:56:33,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2022-12-13 11:56:33,675 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -16 predicate places. [2022-12-13 11:56:33,675 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 126 flow [2022-12-13 11:56:33,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:33,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:33,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:56:33,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:33,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:33,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:33,879 INFO L85 PathProgramCache]: Analyzing trace with hash 27414, now seen corresponding path program 1 times [2022-12-13 11:56:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:33,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454439309] [2022-12-13 11:56:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:33,882 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 [2022-12-13 11:56:33,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:33,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:33,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:56:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:34,230 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:56:34,230 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:56:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:34,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:56:34,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454439309] [2022-12-13 11:56:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454439309] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:34,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:34,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:34,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360112884] [2022-12-13 11:56:34,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:34,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:34,495 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2022-12-13 11:56:34,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:34,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:34,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2022-12-13 11:56:34,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:36,478 INFO L130 PetriNetUnfolder]: 18239/23500 cut-off events. [2022-12-13 11:56:36,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:36,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 23500 events. 18239/23500 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 121850 event pairs, 12836 based on Foata normal form. 0/10303 useless extension candidates. Maximal degree in co-relation 47392. Up to 11726 conditions per place. [2022-12-13 11:56:36,614 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 102 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-12-13 11:56:36,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 444 flow [2022-12-13 11:56:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2022-12-13 11:56:36,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5134474327628362 [2022-12-13 11:56:36,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2022-12-13 11:56:36,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2022-12-13 11:56:36,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:36,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2022-12-13 11:56:36,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:36,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:36,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:36,629 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 126 flow. Second operand 3 states and 630 transitions. [2022-12-13 11:56:36,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 444 flow [2022-12-13 11:56:36,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:36,633 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 137 flow [2022-12-13 11:56:36,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-12-13 11:56:36,634 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -14 predicate places. [2022-12-13 11:56:36,634 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 137 flow [2022-12-13 11:56:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:36,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:36,635 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:56:36,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:56:36,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:36,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash 27501, now seen corresponding path program 1 times [2022-12-13 11:56:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114985560] [2022-12-13 11:56:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:36,838 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 [2022-12-13 11:56:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:36,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:36,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:56:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:36,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:56:36,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114985560] [2022-12-13 11:56:36,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114985560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:36,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:36,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:36,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362535426] [2022-12-13 11:56:36,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:36,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:36,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:36,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 409 [2022-12-13 11:56:36,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:36,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:36,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 409 [2022-12-13 11:56:36,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:38,028 INFO L130 PetriNetUnfolder]: 9120/11752 cut-off events. [2022-12-13 11:56:38,028 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:38,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23711 conditions, 11752 events. 9120/11752 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 55956 event pairs, 6418 based on Foata normal form. 1/5119 useless extension candidates. Maximal degree in co-relation 23703. Up to 11726 conditions per place. [2022-12-13 11:56:38,080 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 52 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-12-13 11:56:38,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 245 flow [2022-12-13 11:56:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-12-13 11:56:38,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4767726161369193 [2022-12-13 11:56:38,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-12-13 11:56:38,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-12-13 11:56:38,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:38,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-12-13 11:56:38,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:38,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:38,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:38,088 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 137 flow. Second operand 3 states and 585 transitions. [2022-12-13 11:56:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 245 flow [2022-12-13 11:56:38,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 241 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:38,090 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 145 flow [2022-12-13 11:56:38,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-12-13 11:56:38,091 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -12 predicate places. [2022-12-13 11:56:38,091 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 145 flow [2022-12-13 11:56:38,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:38,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:38,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:56:38,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 11:56:38,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:38,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 852386, now seen corresponding path program 1 times [2022-12-13 11:56:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:38,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225130338] [2022-12-13 11:56:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:38,297 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 [2022-12-13 11:56:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:38,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:38,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:38,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:56:38,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:38,604 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:56:38,604 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:56:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:38,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:38,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225130338] [2022-12-13 11:56:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225130338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:38,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:56:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:56:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153115583] [2022-12-13 11:56:38,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:56:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:56:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:56:39,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2022-12-13 11:56:39,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:39,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:39,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2022-12-13 11:56:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:42,003 INFO L130 PetriNetUnfolder]: 18245/23509 cut-off events. [2022-12-13 11:56:42,004 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:56:42,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47439 conditions, 23509 events. 18245/23509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 121786 event pairs, 12836 based on Foata normal form. 0/10310 useless extension candidates. Maximal degree in co-relation 47429. Up to 11729 conditions per place. [2022-12-13 11:56:42,092 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 102 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2022-12-13 11:56:42,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 521 flow [2022-12-13 11:56:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:56:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:56:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1118 transitions. [2022-12-13 11:56:42,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45558272208638956 [2022-12-13 11:56:42,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1118 transitions. [2022-12-13 11:56:42,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1118 transitions. [2022-12-13 11:56:42,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:42,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1118 transitions. [2022-12-13 11:56:42,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.33333333333334) internal successors, (1118), 6 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:42,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:42,100 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:42,100 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 145 flow. Second operand 6 states and 1118 transitions. [2022-12-13 11:56:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 521 flow [2022-12-13 11:56:42,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 118 transitions, 517 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:56:42,102 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 239 flow [2022-12-13 11:56:42,102 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2022-12-13 11:56:42,103 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -5 predicate places. [2022-12-13 11:56:42,103 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 239 flow [2022-12-13 11:56:42,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.0) internal successors, (1008), 6 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:42,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:42,103 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:56:42,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:56:42,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:42,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 852473, now seen corresponding path program 1 times [2022-12-13 11:56:42,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:42,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278332142] [2022-12-13 11:56:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:42,305 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 [2022-12-13 11:56:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:42,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:42,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:56:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:42,445 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2022-12-13 11:56:42,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2022-12-13 11:56:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:56:42,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:56:42,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:42,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278332142] [2022-12-13 11:56:42,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278332142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:42,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:42,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866656426] [2022-12-13 11:56:42,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:42,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:42,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2022-12-13 11:56:42,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:42,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:42,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2022-12-13 11:56:42,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:44,014 INFO L130 PetriNetUnfolder]: 15291/19833 cut-off events. [2022-12-13 11:56:44,014 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 11:56:44,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 19833 events. 15291/19833 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 102024 event pairs, 10700 based on Foata normal form. 0/8871 useless extension candidates. Maximal degree in co-relation 40099. Up to 19781 conditions per place. [2022-12-13 11:56:44,086 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 58 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 11:56:44,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 331 flow [2022-12-13 11:56:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2022-12-13 11:56:44,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46373268133659334 [2022-12-13 11:56:44,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2022-12-13 11:56:44,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2022-12-13 11:56:44,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:44,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2022-12-13 11:56:44,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,091 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 239 flow. Second operand 3 states and 569 transitions. [2022-12-13 11:56:44,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 331 flow [2022-12-13 11:56:44,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 313 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:44,092 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 197 flow [2022-12-13 11:56:44,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2022-12-13 11:56:44,093 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -6 predicate places. [2022-12-13 11:56:44,093 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 197 flow [2022-12-13 11:56:44,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:44,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:44,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:56:44,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:44,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:44,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 852471, now seen corresponding path program 1 times [2022-12-13 11:56:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:44,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145139026] [2022-12-13 11:56:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:44,296 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 [2022-12-13 11:56:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:44,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:44,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:56:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:44,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:44,547 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-12-13 11:56:44,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-12-13 11:56:44,574 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-13 11:56:44,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-13 11:56:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:44,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:45,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145139026] [2022-12-13 11:56:45,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145139026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:45,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:56:45,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:56:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749445511] [2022-12-13 11:56:45,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:45,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:56:45,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:56:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:56:45,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:56:45,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:45,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:45,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:56:45,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:47,809 INFO L130 PetriNetUnfolder]: 13813/17994 cut-off events. [2022-12-13 11:56:47,809 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-12-13 11:56:47,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36420 conditions, 17994 events. 13813/17994 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 92310 event pairs, 9632 based on Foata normal form. 0/8259 useless extension candidates. Maximal degree in co-relation 36405. Up to 9887 conditions per place. [2022-12-13 11:56:47,886 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 94 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2022-12-13 11:56:47,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 108 transitions, 495 flow [2022-12-13 11:56:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:56:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:56:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1248 transitions. [2022-12-13 11:56:47,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43590639189661196 [2022-12-13 11:56:47,889 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1248 transitions. [2022-12-13 11:56:47,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1248 transitions. [2022-12-13 11:56:47,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:47,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1248 transitions. [2022-12-13 11:56:47,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.28571428571428) internal successors, (1248), 7 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:47,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:47,894 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:47,894 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 197 flow. Second operand 7 states and 1248 transitions. [2022-12-13 11:56:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 108 transitions, 495 flow [2022-12-13 11:56:47,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:47,896 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 204 flow [2022-12-13 11:56:47,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2022-12-13 11:56:47,897 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 11:56:47,897 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 204 flow [2022-12-13 11:56:47,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:47,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:47,897 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:56:47,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:56:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:48,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash 819245532, now seen corresponding path program 1 times [2022-12-13 11:56:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:48,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212554500] [2022-12-13 11:56:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:48,099 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 [2022-12-13 11:56:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:48,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:48,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:48,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:56:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:48,290 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 11:56:48,290 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-13 11:56:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:56:48,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:56:48,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212554500] [2022-12-13 11:56:48,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212554500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:48,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:48,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:56:48,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235099830] [2022-12-13 11:56:48,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:48,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:56:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:48,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:56:48,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:56:48,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 409 [2022-12-13 11:56:48,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:48,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:48,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 409 [2022-12-13 11:56:48,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:49,276 INFO L130 PetriNetUnfolder]: 7711/10172 cut-off events. [2022-12-13 11:56:49,276 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-12-13 11:56:49,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20817 conditions, 10172 events. 7711/10172 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 48606 event pairs, 5274 based on Foata normal form. 0/5565 useless extension candidates. Maximal degree in co-relation 20800. Up to 10127 conditions per place. [2022-12-13 11:56:49,314 INFO L137 encePairwiseOnDemand]: 401/409 looper letters, 49 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2022-12-13 11:56:49,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 57 transitions, 302 flow [2022-12-13 11:56:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:56:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:56:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 713 transitions. [2022-12-13 11:56:49,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358190709046455 [2022-12-13 11:56:49,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 713 transitions. [2022-12-13 11:56:49,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 713 transitions. [2022-12-13 11:56:49,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:49,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 713 transitions. [2022-12-13 11:56:49,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.25) internal successors, (713), 4 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:49,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:49,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:49,322 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 204 flow. Second operand 4 states and 713 transitions. [2022-12-13 11:56:49,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 57 transitions, 302 flow [2022-12-13 11:56:49,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 57 transitions, 276 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 11:56:49,324 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 178 flow [2022-12-13 11:56:49,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2022-12-13 11:56:49,325 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2022-12-13 11:56:49,325 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 178 flow [2022-12-13 11:56:49,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:49,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:49,325 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:56:49,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:56:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:49,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash 819245533, now seen corresponding path program 1 times [2022-12-13 11:56:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:49,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980553870] [2022-12-13 11:56:49,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:49,531 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 [2022-12-13 11:56:49,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:49,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:49,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:56:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:49,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 11:56:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:49,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980553870] [2022-12-13 11:56:49,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980553870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:49,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:56:49,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:56:49,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34757319] [2022-12-13 11:56:49,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:49,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:56:49,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:56:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:56:50,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 409 [2022-12-13 11:56:50,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 167.25) internal successors, (1338), 8 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:50,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:50,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 409 [2022-12-13 11:56:50,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:51,744 INFO L130 PetriNetUnfolder]: 7711/10164 cut-off events. [2022-12-13 11:56:51,744 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-12-13 11:56:51,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20801 conditions, 10164 events. 7711/10164 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48364 event pairs, 5274 based on Foata normal form. 0/5612 useless extension candidates. Maximal degree in co-relation 20785. Up to 5565 conditions per place. [2022-12-13 11:56:51,775 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 89 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2022-12-13 11:56:51,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 470 flow [2022-12-13 11:56:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:56:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:56:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1259 transitions. [2022-12-13 11:56:51,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4397485155431366 [2022-12-13 11:56:51,778 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1259 transitions. [2022-12-13 11:56:51,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1259 transitions. [2022-12-13 11:56:51,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:51,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1259 transitions. [2022-12-13 11:56:51,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:51,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:51,782 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:51,782 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 178 flow. Second operand 7 states and 1259 transitions. [2022-12-13 11:56:51,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 470 flow [2022-12-13 11:56:51,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 463 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:56:51,784 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 193 flow [2022-12-13 11:56:51,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2022-12-13 11:56:51,784 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -6 predicate places. [2022-12-13 11:56:51,785 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 193 flow [2022-12-13 11:56:51,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.25) internal successors, (1338), 8 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:51,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:51,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:56:51,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 11:56:51,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:51,987 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:51,988 INFO L85 PathProgramCache]: Analyzing trace with hash 819245761, now seen corresponding path program 1 times [2022-12-13 11:56:51,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:51,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517377376] [2022-12-13 11:56:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:51,989 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 [2022-12-13 11:56:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:51,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:51,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:52,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:56:52,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:52,157 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-12-13 11:56:52,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 66 [2022-12-13 11:56:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:56:52,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:56:52,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:52,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517377376] [2022-12-13 11:56:52,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517377376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:56:52,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:56:52,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:56:52,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479552295] [2022-12-13 11:56:52,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:56:52,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:56:52,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:56:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:56:52,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2022-12-13 11:56:52,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:52,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:52,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2022-12-13 11:56:52,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:53,157 INFO L130 PetriNetUnfolder]: 7461/9824 cut-off events. [2022-12-13 11:56:53,158 INFO L131 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2022-12-13 11:56:53,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20128 conditions, 9824 events. 7461/9824 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 46519 event pairs, 5102 based on Foata normal form. 0/5423 useless extension candidates. Maximal degree in co-relation 20112. Up to 9794 conditions per place. [2022-12-13 11:56:53,186 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 52 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2022-12-13 11:56:53,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 54 transitions, 295 flow [2022-12-13 11:56:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:56:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:56:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2022-12-13 11:56:53,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45965770171149145 [2022-12-13 11:56:53,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2022-12-13 11:56:53,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2022-12-13 11:56:53,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:53,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2022-12-13 11:56:53,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:53,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:53,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:53,190 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 193 flow. Second operand 3 states and 564 transitions. [2022-12-13 11:56:53,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 54 transitions, 295 flow [2022-12-13 11:56:53,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 54 transitions, 278 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 11:56:53,191 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 174 flow [2022-12-13 11:56:53,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2022-12-13 11:56:53,191 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-12-13 11:56:53,191 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 174 flow [2022-12-13 11:56:53,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:53,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:53,192 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:56:53,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:56:53,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:53,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 819245762, now seen corresponding path program 1 times [2022-12-13 11:56:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893390061] [2022-12-13 11:56:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:53,396 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 [2022-12-13 11:56:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:53,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:53,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 11:56:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:53,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:53,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:56:53,721 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-12-13 11:56:53,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-12-13 11:56:53,746 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:56:53,747 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 31 treesize of output 27 [2022-12-13 11:56:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:54,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:54,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893390061] [2022-12-13 11:56:54,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893390061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:54,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:56:54,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:56:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082999209] [2022-12-13 11:56:54,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:54,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:56:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:56:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:56:55,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:56:55,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 174 flow. Second operand has 8 states, 8 states have (on average 164.25) internal successors, (1314), 8 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:55,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:56:55,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:56:55,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:56:56,672 INFO L130 PetriNetUnfolder]: 7211/9484 cut-off events. [2022-12-13 11:56:56,672 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-12-13 11:56:56,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 9484 events. 7211/9484 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 44708 event pairs, 4930 based on Foata normal form. 0/5344 useless extension candidates. Maximal degree in co-relation 19425. Up to 5230 conditions per place. [2022-12-13 11:56:56,697 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 86 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2022-12-13 11:56:56,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 432 flow [2022-12-13 11:56:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:56:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:56:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 904 transitions. [2022-12-13 11:56:56,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44205378973105136 [2022-12-13 11:56:56,699 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 904 transitions. [2022-12-13 11:56:56,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 904 transitions. [2022-12-13 11:56:56,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:56:56,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 904 transitions. [2022-12-13 11:56:56,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:56,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:56,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:56,703 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 174 flow. Second operand 5 states and 904 transitions. [2022-12-13 11:56:56,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 432 flow [2022-12-13 11:56:56,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:56:56,705 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 175 flow [2022-12-13 11:56:56,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2022-12-13 11:56:56,705 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-12-13 11:56:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 175 flow [2022-12-13 11:56:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 164.25) internal successors, (1314), 8 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:56:56,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:56:56,706 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:56:56,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:56:56,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:56,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:56:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash -373838314, now seen corresponding path program 2 times [2022-12-13 11:56:56,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:56:56,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247152061] [2022-12-13 11:56:56,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:56:56,911 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 [2022-12-13 11:56:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:56:56,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:56:56,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:56:57,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:56:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:56:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:57,222 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:56:57,222 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:56:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:57,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:56:57,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247152061] [2022-12-13 11:56:57,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247152061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:56:57,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:56:57,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:56:57,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543135523] [2022-12-13 11:56:57,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:57,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:56:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:56:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:56:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:57:01,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2022-12-13 11:57:01,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 175 flow. Second operand has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:01,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:01,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2022-12-13 11:57:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:09,691 INFO L130 PetriNetUnfolder]: 35239/46154 cut-off events. [2022-12-13 11:57:09,691 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2022-12-13 11:57:09,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95055 conditions, 46154 events. 35239/46154 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1814. Compared 257346 event pairs, 24180 based on Foata normal form. 6/26460 useless extension candidates. Maximal degree in co-relation 95039. Up to 5226 conditions per place. [2022-12-13 11:57:09,896 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 367 selfloop transitions, 13 changer transitions 0/381 dead transitions. [2022-12-13 11:57:09,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 381 transitions, 1779 flow [2022-12-13 11:57:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:57:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:57:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2390 transitions. [2022-12-13 11:57:09,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.486960065199674 [2022-12-13 11:57:09,901 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2390 transitions. [2022-12-13 11:57:09,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2390 transitions. [2022-12-13 11:57:09,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:09,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2390 transitions. [2022-12-13 11:57:09,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 199.16666666666666) internal successors, (2390), 12 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:09,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:09,910 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:09,910 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 175 flow. Second operand 12 states and 2390 transitions. [2022-12-13 11:57:09,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 381 transitions, 1779 flow [2022-12-13 11:57:09,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 381 transitions, 1774 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:57:09,918 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 286 flow [2022-12-13 11:57:09,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=286, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2022-12-13 11:57:09,918 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2022-12-13 11:57:09,918 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 286 flow [2022-12-13 11:57:09,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 168.0) internal successors, (2016), 12 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:09,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:09,919 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:57:09,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:57:10,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:10,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash -373838229, now seen corresponding path program 2 times [2022-12-13 11:57:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:10,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28760795] [2022-12-13 11:57:10,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:57:10,123 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 [2022-12-13 11:57:10,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:10,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:10,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:10,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:57:10,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:57:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:10,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:10,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:10,383 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-12-13 11:57:10,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-12-13 11:57:10,435 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-12-13 11:57:10,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 310 [2022-12-13 11:57:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:10,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:10,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:10,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28760795] [2022-12-13 11:57:10,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28760795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:10,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:10,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:57:10,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998880954] [2022-12-13 11:57:10,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:10,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:57:10,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:57:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:57:10,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 409 [2022-12-13 11:57:10,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:10,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:10,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 409 [2022-12-13 11:57:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:13,858 INFO L130 PetriNetUnfolder]: 28838/38147 cut-off events. [2022-12-13 11:57:13,858 INFO L131 PetriNetUnfolder]: For 1042/1042 co-relation queries the response was YES. [2022-12-13 11:57:13,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77450 conditions, 38147 events. 28838/38147 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 1547. Compared 214332 event pairs, 19620 based on Foata normal form. 1600/22494 useless extension candidates. Maximal degree in co-relation 77427. Up to 38012 conditions per place. [2022-12-13 11:57:14,036 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 55 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-12-13 11:57:14,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 57 transitions, 370 flow [2022-12-13 11:57:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:57:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:57:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-12-13 11:57:14,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4612876935615322 [2022-12-13 11:57:14,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-12-13 11:57:14,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-12-13 11:57:14,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:14,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-12-13 11:57:14,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,041 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 286 flow. Second operand 3 states and 566 transitions. [2022-12-13 11:57:14,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 57 transitions, 370 flow [2022-12-13 11:57:14,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 57 transitions, 343 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-12-13 11:57:14,043 INFO L231 Difference]: Finished difference. Result has 77 places, 57 transitions, 233 flow [2022-12-13 11:57:14,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=77, PETRI_TRANSITIONS=57} [2022-12-13 11:57:14,044 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2022-12-13 11:57:14,044 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 57 transitions, 233 flow [2022-12-13 11:57:14,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:14,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:14,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 11:57:14,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:14,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:14,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1315966046, now seen corresponding path program 1 times [2022-12-13 11:57:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:14,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278227387] [2022-12-13 11:57:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:14,249 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 [2022-12-13 11:57:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:14,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:14,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:57:14,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:57:14,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:14,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:14,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278227387] [2022-12-13 11:57:14,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278227387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:14,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:14,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:57:14,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450199230] [2022-12-13 11:57:14,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:14,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:57:14,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:57:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:57:14,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2022-12-13 11:57:14,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 57 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:14,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:14,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2022-12-13 11:57:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:19,179 INFO L130 PetriNetUnfolder]: 43769/57605 cut-off events. [2022-12-13 11:57:19,179 INFO L131 PetriNetUnfolder]: For 370/370 co-relation queries the response was YES. [2022-12-13 11:57:19,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116959 conditions, 57605 events. 43769/57605 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 2263. Compared 336649 event pairs, 10125 based on Foata normal form. 0/31901 useless extension candidates. Maximal degree in co-relation 116936. Up to 39168 conditions per place. [2022-12-13 11:57:19,499 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 11:57:19,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 559 flow [2022-12-13 11:57:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:57:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:57:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 944 transitions. [2022-12-13 11:57:19,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46161369193154034 [2022-12-13 11:57:19,501 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 944 transitions. [2022-12-13 11:57:19,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 944 transitions. [2022-12-13 11:57:19,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:19,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 944 transitions. [2022-12-13 11:57:19,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:19,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:19,506 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:19,506 INFO L175 Difference]: Start difference. First operand has 77 places, 57 transitions, 233 flow. Second operand 5 states and 944 transitions. [2022-12-13 11:57:19,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 559 flow [2022-12-13 11:57:19,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:57:19,508 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 268 flow [2022-12-13 11:57:19,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2022-12-13 11:57:19,509 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-12-13 11:57:19,509 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 268 flow [2022-12-13 11:57:19,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:19,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:19,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:19,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:57:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:19,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1316180232, now seen corresponding path program 1 times [2022-12-13 11:57:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:19,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60323667] [2022-12-13 11:57:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:19,713 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 [2022-12-13 11:57:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:19,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:19,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:57:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:19,879 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-12-13 11:57:19,879 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-12-13 11:57:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:57:19,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:19,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60323667] [2022-12-13 11:57:19,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60323667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:19,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:19,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:57:19,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206288800] [2022-12-13 11:57:19,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:57:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:57:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:57:19,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 409 [2022-12-13 11:57:19,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:19,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:19,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 409 [2022-12-13 11:57:19,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:24,630 INFO L130 PetriNetUnfolder]: 41645/55022 cut-off events. [2022-12-13 11:57:24,630 INFO L131 PetriNetUnfolder]: For 16057/16057 co-relation queries the response was YES. [2022-12-13 11:57:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130183 conditions, 55022 events. 41645/55022 cut-off events. For 16057/16057 co-relation queries the response was YES. Maximal size of possible extension queue 2217. Compared 321972 event pairs, 27450 based on Foata normal form. 0/38732 useless extension candidates. Maximal degree in co-relation 130157. Up to 54860 conditions per place. [2022-12-13 11:57:24,943 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 57 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2022-12-13 11:57:24,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 59 transitions, 380 flow [2022-12-13 11:57:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:57:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:57:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2022-12-13 11:57:24,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474327628361858 [2022-12-13 11:57:24,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2022-12-13 11:57:24,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2022-12-13 11:57:24,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:24,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2022-12-13 11:57:24,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,948 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 268 flow. Second operand 3 states and 549 transitions. [2022-12-13 11:57:24,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 59 transitions, 380 flow [2022-12-13 11:57:24,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 59 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:57:24,957 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 260 flow [2022-12-13 11:57:24,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2022-12-13 11:57:24,958 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-12-13 11:57:24,958 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 260 flow [2022-12-13 11:57:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:24,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:24,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:24,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:57:25,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:25,159 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1316180231, now seen corresponding path program 1 times [2022-12-13 11:57:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340968143] [2022-12-13 11:57:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:25,162 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 [2022-12-13 11:57:25,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:25,165 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:25,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:25,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:57:25,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:25,404 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-12-13 11:57:25,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-12-13 11:57:25,423 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 18 treesize of output 16 [2022-12-13 11:57:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:25,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:57:25,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:25,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340968143] [2022-12-13 11:57:25,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340968143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:25,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:57:25,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:57:25,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903810402] [2022-12-13 11:57:25,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:25,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:57:25,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:57:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:57:27,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:57:27,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 260 flow. Second operand has 8 states, 8 states have (on average 164.75) internal successors, (1318), 8 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:27,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:27,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:57:27,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:32,052 INFO L130 PetriNetUnfolder]: 40727/53645 cut-off events. [2022-12-13 11:57:32,052 INFO L131 PetriNetUnfolder]: For 12655/12655 co-relation queries the response was YES. [2022-12-13 11:57:32,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124928 conditions, 53645 events. 40727/53645 cut-off events. For 12655/12655 co-relation queries the response was YES. Maximal size of possible extension queue 2181. Compared 311458 event pairs, 26784 based on Foata normal form. 0/39161 useless extension candidates. Maximal degree in co-relation 124901. Up to 47540 conditions per place. [2022-12-13 11:57:32,369 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 91 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2022-12-13 11:57:32,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 548 flow [2022-12-13 11:57:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:57:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:57:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 894 transitions. [2022-12-13 11:57:32,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371638141809291 [2022-12-13 11:57:32,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 894 transitions. [2022-12-13 11:57:32,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 894 transitions. [2022-12-13 11:57:32,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:32,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 894 transitions. [2022-12-13 11:57:32,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.8) internal successors, (894), 5 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:32,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:32,375 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:32,375 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 260 flow. Second operand 5 states and 894 transitions. [2022-12-13 11:57:32,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 548 flow [2022-12-13 11:57:32,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 547 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:57:32,384 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 261 flow [2022-12-13 11:57:32,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2022-12-13 11:57:32,385 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2022-12-13 11:57:32,385 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 261 flow [2022-12-13 11:57:32,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 164.75) internal successors, (1318), 8 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:32,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:32,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:32,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:57:32,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:32,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2140245210, now seen corresponding path program 1 times [2022-12-13 11:57:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:32,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180417751] [2022-12-13 11:57:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:32,590 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 [2022-12-13 11:57:32,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:32,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:32,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:57:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:32,861 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:57:32,862 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:57:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:57:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:57:33,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:33,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180417751] [2022-12-13 11:57:33,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180417751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:33,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:57:33,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:57:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524856034] [2022-12-13 11:57:33,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:57:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:57:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:57:36,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:57:36,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:36,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:36,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:57:36,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:44,395 INFO L130 PetriNetUnfolder]: 60131/77693 cut-off events. [2022-12-13 11:57:44,395 INFO L131 PetriNetUnfolder]: For 15355/15355 co-relation queries the response was YES. [2022-12-13 11:57:44,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181667 conditions, 77693 events. 60131/77693 cut-off events. For 15355/15355 co-relation queries the response was YES. Maximal size of possible extension queue 2933. Compared 462492 event pairs, 11511 based on Foata normal form. 1548/58928 useless extension candidates. Maximal degree in co-relation 181639. Up to 26965 conditions per place. [2022-12-13 11:57:44,944 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 131 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2022-12-13 11:57:44,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 763 flow [2022-12-13 11:57:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:57:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:57:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1435 transitions. [2022-12-13 11:57:44,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43856968215158926 [2022-12-13 11:57:44,949 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1435 transitions. [2022-12-13 11:57:44,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1435 transitions. [2022-12-13 11:57:44,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:44,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1435 transitions. [2022-12-13 11:57:44,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.375) internal successors, (1435), 8 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:44,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:44,954 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:44,954 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 261 flow. Second operand 8 states and 1435 transitions. [2022-12-13 11:57:44,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 763 flow [2022-12-13 11:57:44,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 145 transitions, 756 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 11:57:44,966 INFO L231 Difference]: Finished difference. Result has 90 places, 62 transitions, 329 flow [2022-12-13 11:57:44,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=90, PETRI_TRANSITIONS=62} [2022-12-13 11:57:44,967 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 13 predicate places. [2022-12-13 11:57:44,967 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 62 transitions, 329 flow [2022-12-13 11:57:44,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.6) internal successors, (1646), 10 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:44,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:44,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:44,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:57:45,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:45,168 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2128644883, now seen corresponding path program 1 times [2022-12-13 11:57:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178100419] [2022-12-13 11:57:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:45,171 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 [2022-12-13 11:57:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:45,174 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:45,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:57:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:57:45,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:45,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:45,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178100419] [2022-12-13 11:57:45,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178100419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:45,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:45,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:57:45,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868542076] [2022-12-13 11:57:45,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:45,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:57:45,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:45,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:57:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:57:45,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2022-12-13 11:57:45,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 62 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:45,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:45,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2022-12-13 11:57:45,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:57:55,784 INFO L130 PetriNetUnfolder]: 85223/109949 cut-off events. [2022-12-13 11:57:55,784 INFO L131 PetriNetUnfolder]: For 98890/98998 co-relation queries the response was YES. [2022-12-13 11:57:56,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305242 conditions, 109949 events. 85223/109949 cut-off events. For 98890/98998 co-relation queries the response was YES. Maximal size of possible extension queue 4037. Compared 678990 event pairs, 14913 based on Foata normal form. 18/83255 useless extension candidates. Maximal degree in co-relation 305209. Up to 77868 conditions per place. [2022-12-13 11:57:56,671 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 101 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-12-13 11:57:56,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 702 flow [2022-12-13 11:57:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:57:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:57:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 932 transitions. [2022-12-13 11:57:56,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557457212713936 [2022-12-13 11:57:56,674 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 932 transitions. [2022-12-13 11:57:56,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 932 transitions. [2022-12-13 11:57:56,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:57:56,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 932 transitions. [2022-12-13 11:57:56,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:56,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:56,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:56,678 INFO L175 Difference]: Start difference. First operand has 90 places, 62 transitions, 329 flow. Second operand 5 states and 932 transitions. [2022-12-13 11:57:56,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 702 flow [2022-12-13 11:57:57,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 675 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 11:57:57,132 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 332 flow [2022-12-13 11:57:57,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2022-12-13 11:57:57,133 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-12-13 11:57:57,133 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 332 flow [2022-12-13 11:57:57,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:57,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:57:57,133 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:57,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:57,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:57,334 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:57:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2128836240, now seen corresponding path program 1 times [2022-12-13 11:57:57,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:57:57,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112708081] [2022-12-13 11:57:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:57,338 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 [2022-12-13 11:57:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:57:57,341 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:57:57,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:57:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:57:57,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:57,595 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-13 11:57:57,595 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 4 case distinctions, treesize of input 18 treesize of output 36 [2022-12-13 11:57:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:57:57,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:57,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:57:57,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112708081] [2022-12-13 11:57:57,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112708081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:57,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:57,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:57:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111476428] [2022-12-13 11:57:57,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:57,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:57:57,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:57:57,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:57:57,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:57:57,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 409 [2022-12-13 11:57:57,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:57:57,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:57:57,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 409 [2022-12-13 11:57:57,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:06,497 INFO L130 PetriNetUnfolder]: 74684/96800 cut-off events. [2022-12-13 11:58:06,497 INFO L131 PetriNetUnfolder]: For 106739/106739 co-relation queries the response was YES. [2022-12-13 11:58:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274373 conditions, 96800 events. 74684/96800 cut-off events. For 106739/106739 co-relation queries the response was YES. Maximal size of possible extension queue 3550. Compared 572863 event pairs, 49302 based on Foata normal form. 0/80384 useless extension candidates. Maximal degree in co-relation 274339. Up to 96611 conditions per place. [2022-12-13 11:58:07,296 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 59 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2022-12-13 11:58:07,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 61 transitions, 448 flow [2022-12-13 11:58:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:58:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:58:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2022-12-13 11:58:07,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4441727791361043 [2022-12-13 11:58:07,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2022-12-13 11:58:07,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2022-12-13 11:58:07,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:07,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2022-12-13 11:58:07,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,301 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 332 flow. Second operand 3 states and 545 transitions. [2022-12-13 11:58:07,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 61 transitions, 448 flow [2022-12-13 11:58:07,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 61 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:58:07,408 INFO L231 Difference]: Finished difference. Result has 89 places, 61 transitions, 320 flow [2022-12-13 11:58:07,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=89, PETRI_TRANSITIONS=61} [2022-12-13 11:58:07,408 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 12 predicate places. [2022-12-13 11:58:07,408 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 61 transitions, 320 flow [2022-12-13 11:58:07,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:07,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:07,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:07,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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)] Ended with exit code 0 [2022-12-13 11:58:07,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:58:07,609 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:58:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2128836242, now seen corresponding path program 1 times [2022-12-13 11:58:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:58:07,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616255240] [2022-12-13 11:58:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:07,612 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 [2022-12-13 11:58:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:58:07,615 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:58:07,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:58:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:07,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:58:07,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:07,863 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:58:07,863 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:58:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:08,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:08,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:58:08,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616255240] [2022-12-13 11:58:08,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616255240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:08,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:58:08,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:58:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053236784] [2022-12-13 11:58:08,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:08,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:58:08,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:58:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:58:08,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:58:09,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:58:09,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 61 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 165.25) internal successors, (1322), 8 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:09,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:09,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:58:09,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:17,605 INFO L130 PetriNetUnfolder]: 65873/85379 cut-off events. [2022-12-13 11:58:17,605 INFO L131 PetriNetUnfolder]: For 84095/84095 co-relation queries the response was YES. [2022-12-13 11:58:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238841 conditions, 85379 events. 65873/85379 cut-off events. For 84095/84095 co-relation queries the response was YES. Maximal size of possible extension queue 3059. Compared 495769 event pairs, 43587 based on Foata normal form. 0/73942 useless extension candidates. Maximal degree in co-relation 238807. Up to 75796 conditions per place. [2022-12-13 11:58:18,281 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 95 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2022-12-13 11:58:18,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 99 transitions, 664 flow [2022-12-13 11:58:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:58:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:58:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 886 transitions. [2022-12-13 11:58:18,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4332518337408313 [2022-12-13 11:58:18,284 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 886 transitions. [2022-12-13 11:58:18,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 886 transitions. [2022-12-13 11:58:18,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:18,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 886 transitions. [2022-12-13 11:58:18,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:18,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:18,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:18,287 INFO L175 Difference]: Start difference. First operand has 89 places, 61 transitions, 320 flow. Second operand 5 states and 886 transitions. [2022-12-13 11:58:18,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 99 transitions, 664 flow [2022-12-13 11:58:18,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 663 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:58:18,414 INFO L231 Difference]: Finished difference. Result has 90 places, 59 transitions, 321 flow [2022-12-13 11:58:18,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=90, PETRI_TRANSITIONS=59} [2022-12-13 11:58:18,415 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 13 predicate places. [2022-12-13 11:58:18,415 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 59 transitions, 321 flow [2022-12-13 11:58:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 165.25) internal successors, (1322), 8 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:18,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:18,415 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:18,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-13 11:58:18,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:58:18,616 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:58:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1563485495, now seen corresponding path program 1 times [2022-12-13 11:58:18,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:58:18,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506595450] [2022-12-13 11:58:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:18,619 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 [2022-12-13 11:58:18,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:58:18,622 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:58:18,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 11:58:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:58:18,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:18,883 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:58:18,883 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:58:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:58:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:58:19,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:58:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506595450] [2022-12-13 11:58:19,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506595450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:19,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:58:19,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:58:19,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922317436] [2022-12-13 11:58:19,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:19,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:58:19,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:58:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:58:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:58:21,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:58:21,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 59 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:21,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:21,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:58:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:34,955 INFO L130 PetriNetUnfolder]: 98849/126239 cut-off events. [2022-12-13 11:58:34,955 INFO L131 PetriNetUnfolder]: For 123812/123812 co-relation queries the response was YES. [2022-12-13 11:58:35,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351686 conditions, 126239 events. 98849/126239 cut-off events. For 123812/123812 co-relation queries the response was YES. Maximal size of possible extension queue 4131. Compared 762670 event pairs, 23391 based on Foata normal form. 2628/113522 useless extension candidates. Maximal degree in co-relation 351651. Up to 47638 conditions per place. [2022-12-13 11:58:36,081 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 145 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2022-12-13 11:58:36,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 159 transitions, 1050 flow [2022-12-13 11:58:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:58:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:58:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1419 transitions. [2022-12-13 11:58:36,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433679706601467 [2022-12-13 11:58:36,086 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1419 transitions. [2022-12-13 11:58:36,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1419 transitions. [2022-12-13 11:58:36,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:36,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1419 transitions. [2022-12-13 11:58:36,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 177.375) internal successors, (1419), 8 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:36,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:36,091 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:36,091 INFO L175 Difference]: Start difference. First operand has 90 places, 59 transitions, 321 flow. Second operand 8 states and 1419 transitions. [2022-12-13 11:58:36,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 159 transitions, 1050 flow [2022-12-13 11:58:36,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1043 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 11:58:36,240 INFO L231 Difference]: Finished difference. Result has 99 places, 64 transitions, 389 flow [2022-12-13 11:58:36,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=389, PETRI_PLACES=99, PETRI_TRANSITIONS=64} [2022-12-13 11:58:36,240 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 22 predicate places. [2022-12-13 11:58:36,240 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 64 transitions, 389 flow [2022-12-13 11:58:36,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:36,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:36,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:36,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 11:58:36,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:58:36,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:58:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1569408589, now seen corresponding path program 1 times [2022-12-13 11:58:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:58:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959303563] [2022-12-13 11:58:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:36,445 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 [2022-12-13 11:58:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:58:36,448 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:58:36,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 11:58:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:58:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:36,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:36,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 11:58:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:58:36,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:58:36,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959303563] [2022-12-13 11:58:36,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959303563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:36,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:58:36,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:58:36,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705486997] [2022-12-13 11:58:36,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:36,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:58:36,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:58:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:58:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:58:39,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:58:39,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 64 transitions, 389 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:39,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:58:39,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:58:39,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:58:56,501 INFO L130 PetriNetUnfolder]: 127811/167828 cut-off events. [2022-12-13 11:58:56,501 INFO L131 PetriNetUnfolder]: For 340117/340117 co-relation queries the response was YES. [2022-12-13 11:58:57,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563515 conditions, 167828 events. 127811/167828 cut-off events. For 340117/340117 co-relation queries the response was YES. Maximal size of possible extension queue 3449. Compared 994822 event pairs, 63045 based on Foata normal form. 0/161564 useless extension candidates. Maximal degree in co-relation 563475. Up to 101297 conditions per place. [2022-12-13 11:58:58,143 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 172 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2022-12-13 11:58:58,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 186 transitions, 1349 flow [2022-12-13 11:58:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:58:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:58:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1586 transitions. [2022-12-13 11:58:58,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308611790274382 [2022-12-13 11:58:58,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1586 transitions. [2022-12-13 11:58:58,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1586 transitions. [2022-12-13 11:58:58,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:58:58,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1586 transitions. [2022-12-13 11:58:58,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.22222222222223) internal successors, (1586), 9 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:58,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 409.0) internal successors, (4090), 10 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:58,152 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 409.0) internal successors, (4090), 10 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:58,152 INFO L175 Difference]: Start difference. First operand has 99 places, 64 transitions, 389 flow. Second operand 9 states and 1586 transitions. [2022-12-13 11:58:58,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 186 transitions, 1349 flow [2022-12-13 11:58:58,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 1302 flow, removed 16 selfloop flow, removed 3 redundant places. [2022-12-13 11:58:58,674 INFO L231 Difference]: Finished difference. Result has 106 places, 68 transitions, 428 flow [2022-12-13 11:58:58,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=106, PETRI_TRANSITIONS=68} [2022-12-13 11:58:58,674 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-12-13 11:58:58,675 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 68 transitions, 428 flow [2022-12-13 11:58:58,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:58:58,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:58:58,675 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:58,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 11:58:58,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:58:58,876 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:58:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1407029954, now seen corresponding path program 1 times [2022-12-13 11:58:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:58:58,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516255085] [2022-12-13 11:58:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:58,879 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 [2022-12-13 11:58:58,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:58:58,882 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:58:58,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (23)] Waiting until timeout for monitored process [2022-12-13 11:58:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:58:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:59,145 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:58:59,145 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:58:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:58:59,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:58:59,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:58:59,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516255085] [2022-12-13 11:58:59,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516255085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:59,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:58:59,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:58:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523068720] [2022-12-13 11:58:59,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:59,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:58:59,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:58:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:58:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:59:02,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 409 [2022-12-13 11:59:02,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 68 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 165.2) internal successors, (1652), 10 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:02,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:59:02,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 409 [2022-12-13 11:59:02,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:59:31,164 INFO L130 PetriNetUnfolder]: 201899/260708 cut-off events. [2022-12-13 11:59:31,164 INFO L131 PetriNetUnfolder]: For 534691/534691 co-relation queries the response was YES. [2022-12-13 11:59:33,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922809 conditions, 260708 events. 201899/260708 cut-off events. For 534691/534691 co-relation queries the response was YES. Maximal size of possible extension queue 4900. Compared 1542080 event pairs, 46503 based on Foata normal form. 25056/285764 useless extension candidates. Maximal degree in co-relation 922767. Up to 86887 conditions per place. [2022-12-13 11:59:33,926 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 183 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2022-12-13 11:59:33,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 200 transitions, 1496 flow [2022-12-13 11:59:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:59:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:59:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1426 transitions. [2022-12-13 11:59:33,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358190709046455 [2022-12-13 11:59:33,930 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1426 transitions. [2022-12-13 11:59:33,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1426 transitions. [2022-12-13 11:59:33,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:59:33,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1426 transitions. [2022-12-13 11:59:33,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:33,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:33,938 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:33,938 INFO L175 Difference]: Start difference. First operand has 106 places, 68 transitions, 428 flow. Second operand 8 states and 1426 transitions. [2022-12-13 11:59:33,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 200 transitions, 1496 flow [2022-12-13 11:59:35,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 200 transitions, 1477 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-13 11:59:35,243 INFO L231 Difference]: Finished difference. Result has 114 places, 73 transitions, 512 flow [2022-12-13 11:59:35,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=512, PETRI_PLACES=114, PETRI_TRANSITIONS=73} [2022-12-13 11:59:35,244 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-12-13 11:59:35,244 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 73 transitions, 512 flow [2022-12-13 11:59:35,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.2) internal successors, (1652), 10 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:35,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:59:35,244 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:35,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:59:35,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 11:59:35,445 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 11:59:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1258965854, now seen corresponding path program 2 times [2022-12-13 11:59:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:59:35,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661832293] [2022-12-13 11:59:35,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:59:35,448 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 [2022-12-13 11:59:35,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:59:35,451 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 11:59:35,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (24)] Waiting until timeout for monitored process [2022-12-13 11:59:35,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:59:35,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:59:35,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:35,735 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:59:35,736 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:59:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:35,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:59:36,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:59:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661832293] [2022-12-13 11:59:36,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661832293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:36,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:59:36,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 11:59:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33457032] [2022-12-13 11:59:36,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:36,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:59:36,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:59:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:59:36,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:59:49,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 409 [2022-12-13 11:59:49,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 73 transitions, 512 flow. Second operand has 18 states, 18 states have (on average 157.22222222222223) internal successors, (2830), 18 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:59:49,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:59:49,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 409 [2022-12-13 11:59:49,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:00:29,307 INFO L130 PetriNetUnfolder]: 183763/238130 cut-off events. [2022-12-13 12:00:29,307 INFO L131 PetriNetUnfolder]: For 831633/857008 co-relation queries the response was YES. [2022-12-13 12:00:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978905 conditions, 238130 events. 183763/238130 cut-off events. For 831633/857008 co-relation queries the response was YES. Maximal size of possible extension queue 5097. Compared 1436278 event pairs, 70261 based on Foata normal form. 26881/265003 useless extension candidates. Maximal degree in co-relation 978858. Up to 105814 conditions per place. [2022-12-13 12:00:32,146 INFO L137 encePairwiseOnDemand]: 401/409 looper letters, 475 selfloop transitions, 24 changer transitions 0/501 dead transitions. [2022-12-13 12:00:32,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 501 transitions, 4006 flow [2022-12-13 12:00:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:00:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:00:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3275 transitions. [2022-12-13 12:00:32,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4214386822802728 [2022-12-13 12:00:32,154 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3275 transitions. [2022-12-13 12:00:32,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3275 transitions. [2022-12-13 12:00:32,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:00:32,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3275 transitions. [2022-12-13 12:00:32,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 172.3684210526316) internal successors, (3275), 19 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:32,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 409.0) internal successors, (8180), 20 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:32,164 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 409.0) internal successors, (8180), 20 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:32,165 INFO L175 Difference]: Start difference. First operand has 114 places, 73 transitions, 512 flow. Second operand 19 states and 3275 transitions. [2022-12-13 12:00:32,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 501 transitions, 4006 flow [2022-12-13 12:00:35,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 501 transitions, 3784 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-12-13 12:00:35,826 INFO L231 Difference]: Finished difference. Result has 134 places, 87 transitions, 654 flow [2022-12-13 12:00:35,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=654, PETRI_PLACES=134, PETRI_TRANSITIONS=87} [2022-12-13 12:00:35,826 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-12-13 12:00:35,826 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 87 transitions, 654 flow [2022-12-13 12:00:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.22222222222223) internal successors, (2830), 18 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:35,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:00:35,827 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 12:00:35,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (24)] Ended with exit code 0 [2022-12-13 12:00:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 12:00:36,028 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 12:00:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 545178262, now seen corresponding path program 3 times [2022-12-13 12:00:36,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:00:36,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458618109] [2022-12-13 12:00:36,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:00:36,031 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 [2022-12-13 12:00:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:00:36,034 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 12:00:36,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (25)] Waiting until timeout for monitored process [2022-12-13 12:00:36,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:00:36,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:00:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:36,387 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 12:00:36,387 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 12:00:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:36,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:00:39,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:00:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458618109] [2022-12-13 12:00:39,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458618109] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:39,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:00:39,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 12:00:39,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339490087] [2022-12-13 12:00:39,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:39,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:00:39,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:00:39,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:00:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:00:59,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 409 [2022-12-13 12:00:59,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 87 transitions, 654 flow. Second operand has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:00:59,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:00:59,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 409 [2022-12-13 12:00:59,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:02:34,447 INFO L130 PetriNetUnfolder]: 425599/550178 cut-off events. [2022-12-13 12:02:34,447 INFO L131 PetriNetUnfolder]: For 1979038/2037113 co-relation queries the response was YES. [2022-12-13 12:02:39,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2290384 conditions, 550178 events. 425599/550178 cut-off events. For 1979038/2037113 co-relation queries the response was YES. Maximal size of possible extension queue 7268. Compared 3370909 event pairs, 304837 based on Foata normal form. 58087/608242 useless extension candidates. Maximal degree in co-relation 2290332. Up to 96633 conditions per place. [2022-12-13 12:02:41,942 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 1093 selfloop transitions, 24 changer transitions 0/1119 dead transitions. [2022-12-13 12:02:41,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 1119 transitions, 8901 flow [2022-12-13 12:02:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:02:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 12:02:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4696 transitions. [2022-12-13 12:02:41,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47840260798696005 [2022-12-13 12:02:41,950 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4696 transitions. [2022-12-13 12:02:41,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4696 transitions. [2022-12-13 12:02:41,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:02:41,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4696 transitions. [2022-12-13 12:02:41,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 195.66666666666666) internal successors, (4696), 24 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:41,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:41,963 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 409.0) internal successors, (10225), 25 states have internal predecessors, (10225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:41,963 INFO L175 Difference]: Start difference. First operand has 134 places, 87 transitions, 654 flow. Second operand 24 states and 4696 transitions. [2022-12-13 12:02:41,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 1119 transitions, 8901 flow [2022-12-13 12:02:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 1119 transitions, 8818 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-12-13 12:02:56,741 INFO L231 Difference]: Finished difference. Result has 164 places, 100 transitions, 800 flow [2022-12-13 12:02:56,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=800, PETRI_PLACES=164, PETRI_TRANSITIONS=100} [2022-12-13 12:02:56,741 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 87 predicate places. [2022-12-13 12:02:56,741 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 100 transitions, 800 flow [2022-12-13 12:02:56,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:02:56,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:02:56,742 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 12:02:56,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (25)] Ended with exit code 0 [2022-12-13 12:02:56,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 12:02:56,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 12:02:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -451279514, now seen corresponding path program 3 times [2022-12-13 12:02:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:02:56,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94100394] [2022-12-13 12:02:56,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:02:56,946 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 [2022-12-13 12:02:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:02:56,949 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 12:02:56,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (26)] Waiting until timeout for monitored process [2022-12-13 12:02:57,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:02:57,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:02:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:57,326 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 12:02:57,326 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 12:02:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:57,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:57,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-13 12:02:57,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-13 12:02:57,840 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 12:02:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:02:59,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:02:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94100394] [2022-12-13 12:02:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94100394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:59,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:02:59,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-12-13 12:02:59,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590988670] [2022-12-13 12:02:59,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:59,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:02:59,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:02:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:02:59,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:03:15,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 409 [2022-12-13 12:03:15,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 100 transitions, 800 flow. Second operand has 21 states, 21 states have (on average 161.23809523809524) internal successors, (3386), 21 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:03:15,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:03:15,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 409 [2022-12-13 12:03:15,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:04:46,943 INFO L130 PetriNetUnfolder]: 432953/560652 cut-off events. [2022-12-13 12:04:46,944 INFO L131 PetriNetUnfolder]: For 2011563/2071226 co-relation queries the response was YES. [2022-12-13 12:04:53,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317842 conditions, 560652 events. 432953/560652 cut-off events. For 2011563/2071226 co-relation queries the response was YES. Maximal size of possible extension queue 7381. Compared 3498543 event pairs, 233253 based on Foata normal form. 61169/621817 useless extension candidates. Maximal degree in co-relation 2317778. Up to 404383 conditions per place. [2022-12-13 12:04:56,349 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 595 selfloop transitions, 31 changer transitions 0/628 dead transitions. [2022-12-13 12:04:56,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 628 transitions, 4870 flow [2022-12-13 12:04:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:04:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 12:04:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3907 transitions. [2022-12-13 12:04:56,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43420760168926426 [2022-12-13 12:04:56,358 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3907 transitions. [2022-12-13 12:04:56,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3907 transitions. [2022-12-13 12:04:56,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:04:56,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3907 transitions. [2022-12-13 12:04:56,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 177.5909090909091) internal successors, (3907), 22 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:56,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 409.0) internal successors, (9407), 23 states have internal predecessors, (9407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:56,368 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 409.0) internal successors, (9407), 23 states have internal predecessors, (9407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:04:56,368 INFO L175 Difference]: Start difference. First operand has 164 places, 100 transitions, 800 flow. Second operand 22 states and 3907 transitions. [2022-12-13 12:04:56,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 628 transitions, 4870 flow [2022-12-13 12:05:39,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 628 transitions, 4822 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 12:05:39,452 INFO L231 Difference]: Finished difference. Result has 183 places, 113 transitions, 987 flow [2022-12-13 12:05:39,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=987, PETRI_PLACES=183, PETRI_TRANSITIONS=113} [2022-12-13 12:05:39,453 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 106 predicate places. [2022-12-13 12:05:39,453 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 113 transitions, 987 flow [2022-12-13 12:05:39,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 161.23809523809524) internal successors, (3386), 21 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:39,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:05:39,453 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:39,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (26)] Ended with exit code 0 [2022-12-13 12:05:39,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 [2022-12-13 12:05:39,655 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-13 12:05:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1120406509, now seen corresponding path program 2 times [2022-12-13 12:05:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 12:05:39,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20576847] [2022-12-13 12:05:39,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:05:39,658 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 [2022-12-13 12:05:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 12:05:39,661 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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) [2022-12-13 12:05:39,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cc2102-2352-47ca-9a53-372d5a93edf9/bin/uautomizer-uyxdKDjOR8/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 (27)] Waiting until timeout for monitored process [2022-12-13 12:05:39,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:05:39,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:05:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 12:05:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:39,956 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 12:05:39,956 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 12:05:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:40,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:41,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 12:05:41,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20576847] [2022-12-13 12:05:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20576847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:41,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:05:41,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 12:05:41,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089512380] [2022-12-13 12:05:41,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:41,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 12:05:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 12:05:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 12:05:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:05:52,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 409 [2022-12-13 12:05:52,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 113 transitions, 987 flow. Second operand has 18 states, 18 states have (on average 157.44444444444446) internal successors, (2834), 18 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:05:52,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:05:52,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 409 [2022-12-13 12:05:52,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand