./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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_2964fe11-a3c6-4b51-9840-28e26c62a067/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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- 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 14:00:05,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:00:05,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:00:05,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:00:05,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:00:05,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:00:05,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:00:05,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:00:05,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:00:05,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:00:05,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:00:05,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:00:05,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:00:05,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:00:05,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:00:05,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:00:05,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:00:05,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:00:05,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:00:05,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:00:05,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:00:05,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:00:05,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:00:05,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:00:05,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:00:05,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:00:05,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:00:05,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:00:05,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:00:05,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:00:05,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:00:05,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:00:05,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:00:05,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:00:05,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:00:05,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:00:05,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:00:05,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:00:05,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:00:05,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:00:05,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:00:05,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:00:05,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:00:05,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:00:05,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:00:05,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:00:05,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:00:05,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:00:05,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:00:05,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:00:05,557 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:00:05,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:00:05,558 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:00:05,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:00:05,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:00:05,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:00:05,560 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:00:05,560 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_2964fe11-a3c6-4b51-9840-28e26c62a067/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-12-13 14:00:05,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:00:05,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:00:05,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:00:05,791 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:00:05,792 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:00:05,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-12-13 14:00:08,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:00:08,509 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:00:08,509 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-12-13 14:00:08,514 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data/82bd9aa6e/d4e5ccc8520543e2b3a55e77849135be/FLAG4189c3fd6 [2022-12-13 14:00:08,929 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data/82bd9aa6e/d4e5ccc8520543e2b3a55e77849135be [2022-12-13 14:00:08,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:00:08,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:00:08,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:00:08,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:00:08,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:00:08,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:00:08" (1/1) ... [2022-12-13 14:00:08,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ccf60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:08, skipping insertion in model container [2022-12-13 14:00:08,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:00:08" (1/1) ... [2022-12-13 14:00:08,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:00:08,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:00:09,093 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_2964fe11-a3c6-4b51-9840-28e26c62a067/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-13 14:00:09,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:00:09,113 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 14:00:09,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78ca1e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:09, skipping insertion in model container [2022-12-13 14:00:09,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:00:09,114 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 14:00:09,115 INFO L158 Benchmark]: Toolchain (without parser) took 181.40ms. Allocated memory is still 121.6MB. Free memory was 87.6MB in the beginning and 77.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 14:00:09,116 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 121.6MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:00:09,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.67ms. Allocated memory is still 121.6MB. Free memory was 87.2MB in the beginning and 77.5MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 14:00:09,117 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 121.6MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.67ms. Allocated memory is still 121.6MB. Free memory was 87.2MB in the beginning and 77.5MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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_2964fe11-a3c6-4b51-9840-28e26c62a067/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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- 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 14:00:10,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:00:10,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:00:10,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:00:10,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:00:10,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:00:10,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:00:10,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:00:10,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:00:10,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:00:10,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:00:10,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:00:10,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:00:10,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:00:10,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:00:10,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:00:10,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:00:10,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:00:10,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:00:10,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:00:10,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:00:10,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:00:10,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:00:10,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:00:10,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:00:10,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:00:10,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:00:10,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:00:10,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:00:10,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:00:10,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:00:10,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:00:10,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:00:10,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:00:10,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:00:10,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:00:10,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:00:10,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:00:10,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:00:10,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:00:10,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:00:10,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 14:00:10,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:00:10,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:00:10,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:00:10,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:00:10,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:00:10,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:00:10,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:00:10,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:00:10,545 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:00:10,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:00:10,545 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:00:10,545 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:00:10,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:00:10,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:00:10,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:00:10,546 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:00:10,546 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:00:10,546 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:00:10,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:00:10,547 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:00:10,547 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 14:00:10,547 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 14:00:10,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:00:10,548 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:00:10,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:00:10,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:00:10,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:00:10,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:00:10,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:00:10,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:00:10,549 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 14:00:10,549 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 14:00:10,549 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:00:10,550 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:00:10,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:00:10,550 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 14:00:10,550 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:00:10,550 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_2964fe11-a3c6-4b51-9840-28e26c62a067/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-12-13 14:00:10,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:00:10,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:00:10,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:00:10,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:00:10,772 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:00:10,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-12-13 14:00:13,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:00:13,524 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:00:13,525 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-12-13 14:00:13,532 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data/c4075259f/aaeec2b21d7f47bda832c38ebfa1d869/FLAGa39e4a7b7 [2022-12-13 14:00:13,545 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/data/c4075259f/aaeec2b21d7f47bda832c38ebfa1d869 [2022-12-13 14:00:13,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:00:13,548 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:00:13,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:00:13,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:00:13,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:00:13,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b29d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13, skipping insertion in model container [2022-12-13 14:00:13,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:00:13,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:00:13,719 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_2964fe11-a3c6-4b51-9840-28e26c62a067/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-13 14:00:13,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:00:13,737 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 14:00:13,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:00:13,749 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_2964fe11-a3c6-4b51-9840-28e26c62a067/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-13 14:00:13,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:00:13,757 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:00:13,773 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_2964fe11-a3c6-4b51-9840-28e26c62a067/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-12-13 14:00:13,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:00:13,789 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:00:13,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13 WrapperNode [2022-12-13 14:00:13,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:00:13,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:00:13,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:00:13,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:00:13,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,823 INFO L138 Inliner]: procedures = 27, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 190 [2022-12-13 14:00:13,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:00:13,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:00:13,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:00:13,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:00:13,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:00:13,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:00:13,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:00:13,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:00:13,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (1/1) ... [2022-12-13 14:00:13,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:00:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:00:13,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:00:13,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:00:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:00:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 14:00:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:00:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 14:00:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:00:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:00:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:00:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:00:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:00:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:00:13,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:00:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:00:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 14:00:13,915 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 14:00:13,999 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:00:14,001 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:00:14,472 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:00:14,483 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:00:14,484 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 14:00:14,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:00:14 BoogieIcfgContainer [2022-12-13 14:00:14,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:00:14,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:00:14,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:00:14,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:00:14,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:00:13" (1/3) ... [2022-12-13 14:00:14,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4641c748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:00:14, skipping insertion in model container [2022-12-13 14:00:14,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:00:13" (2/3) ... [2022-12-13 14:00:14,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4641c748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:00:14, skipping insertion in model container [2022-12-13 14:00:14,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:00:14" (3/3) ... [2022-12-13 14:00:14,491 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2022-12-13 14:00:14,511 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:00:14,511 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-13 14:00:14,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:00:14,579 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:00:14,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 282 transitions, 580 flow [2022-12-13 14:00:14,674 INFO L130 PetriNetUnfolder]: 21/280 cut-off events. [2022-12-13 14:00:14,675 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:00:14,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 280 events. 21/280 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 404 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-12-13 14:00:14,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 282 transitions, 580 flow [2022-12-13 14:00:14,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 275 transitions, 562 flow [2022-12-13 14:00:14,698 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:00:14,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 275 transitions, 562 flow [2022-12-13 14:00:14,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 275 transitions, 562 flow [2022-12-13 14:00:14,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 562 flow [2022-12-13 14:00:14,766 INFO L130 PetriNetUnfolder]: 21/275 cut-off events. [2022-12-13 14:00:14,767 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:00:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 275 events. 21/275 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 405 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-12-13 14:00:14,774 INFO L119 LiptonReduction]: Number of co-enabled transitions 8848 [2022-12-13 14:00:33,649 INFO L134 LiptonReduction]: Checked pairs total: 9490 [2022-12-13 14:00:33,650 INFO L136 LiptonReduction]: Total number of compositions: 334 [2022-12-13 14:00:33,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:00:33,664 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;@33c279b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:00:33,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-12-13 14:00:33,666 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 14:00:33,666 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:00:33,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:33,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:00:33,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 36087, now seen corresponding path program 1 times [2022-12-13 14:00:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:33,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856197801] [2022-12-13 14:00:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:33,679 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 14:00:33,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:33,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:33,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:00:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:33,846 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:00:33,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:00:33,866 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 14:00:33,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:33,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:33,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856197801] [2022-12-13 14:00:33,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856197801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:33,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:33,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:00:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297344018] [2022-12-13 14:00:33,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:33,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:34,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 616 [2022-12-13 14:00:34,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 14:00:34,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:34,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 616 [2022-12-13 14:00:34,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:34,270 INFO L130 PetriNetUnfolder]: 455/748 cut-off events. [2022-12-13 14:00:34,270 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-13 14:00:34,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 748 events. 455/748 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3273 event pairs, 385 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 1376. Up to 748 conditions per place. [2022-12-13 14:00:34,274 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 14:00:34,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 164 flow [2022-12-13 14:00:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2022-12-13 14:00:34,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-13 14:00:34,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2022-12-13 14:00:34,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2022-12-13 14:00:34,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:34,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2022-12-13 14:00:34,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 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 14:00:34,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:34,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:34,303 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 96 flow. Second operand 3 states and 792 transitions. [2022-12-13 14:00:34,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 164 flow [2022-12-13 14:00:34,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:00:34,307 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 82 flow [2022-12-13 14:00:34,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-13 14:00:34,311 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2022-12-13 14:00:34,311 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 82 flow [2022-12-13 14:00:34,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 14:00:34,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:34,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 14:00:34,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:34,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:34,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 36088, now seen corresponding path program 1 times [2022-12-13 14:00:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:34,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43141140] [2022-12-13 14:00:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:34,514 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 14:00:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:34,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:34,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:00:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:34,612 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:00:34,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:00:34,625 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 14:00:34,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:34,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43141140] [2022-12-13 14:00:34,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43141140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:34,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:34,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:00:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820946225] [2022-12-13 14:00:34,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:34,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:34,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 616 [2022-12-13 14:00:34,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 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 14:00:34,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:34,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 616 [2022-12-13 14:00:34,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:35,291 INFO L130 PetriNetUnfolder]: 909/1493 cut-off events. [2022-12-13 14:00:35,291 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 14:00:35,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 1493 events. 909/1493 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 7636 event pairs, 770 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 3002. Up to 749 conditions per place. [2022-12-13 14:00:35,300 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 69 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2022-12-13 14:00:35,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 73 transitions, 302 flow [2022-12-13 14:00:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2022-12-13 14:00:35,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2022-12-13 14:00:35,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2022-12-13 14:00:35,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2022-12-13 14:00:35,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:35,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2022-12-13 14:00:35,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 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 14:00:35,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:35,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:35,313 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 82 flow. Second operand 3 states and 819 transitions. [2022-12-13 14:00:35,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 73 transitions, 302 flow [2022-12-13 14:00:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:00:35,315 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 113 flow [2022-12-13 14:00:35,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-12-13 14:00:35,316 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2022-12-13 14:00:35,316 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 113 flow [2022-12-13 14:00:35,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 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 14:00:35,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:35,317 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:00:35,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:35,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1126827, now seen corresponding path program 1 times [2022-12-13 14:00:35,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:35,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214112032] [2022-12-13 14:00:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:35,522 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 14:00:35,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:35,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:35,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:00:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:35,726 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 14:00:35,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:35,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:35,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214112032] [2022-12-13 14:00:35,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214112032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:35,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:00:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949164095] [2022-12-13 14:00:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:35,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 616 [2022-12-13 14:00:35,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 14:00:35,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:35,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 616 [2022-12-13 14:00:35,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:36,050 INFO L130 PetriNetUnfolder]: 455/750 cut-off events. [2022-12-13 14:00:36,050 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 14:00:36,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 750 events. 455/750 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3287 event pairs, 385 based on Foata normal form. 2/266 useless extension candidates. Maximal degree in co-relation 1517. Up to 749 conditions per place. [2022-12-13 14:00:36,052 INFO L137 encePairwiseOnDemand]: 609/616 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2022-12-13 14:00:36,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 189 flow [2022-12-13 14:00:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2022-12-13 14:00:36,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2022-12-13 14:00:36,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2022-12-13 14:00:36,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2022-12-13 14:00:36,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:36,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2022-12-13 14:00:36,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 14:00:36,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:36,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:36,059 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 113 flow. Second operand 3 states and 800 transitions. [2022-12-13 14:00:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 189 flow [2022-12-13 14:00:36,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:36,060 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 119 flow [2022-12-13 14:00:36,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-12-13 14:00:36,060 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2022-12-13 14:00:36,061 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 119 flow [2022-12-13 14:00:36,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 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 14:00:36,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:36,061 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:00:36,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:36,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:36,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:36,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1123878, now seen corresponding path program 1 times [2022-12-13 14:00:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951195282] [2022-12-13 14:00:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:36,267 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 14:00:36,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:36,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:36,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:00:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:36,408 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:00:36,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:00:36,432 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 14:00:36,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:36,519 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 14:00:36,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:36,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951195282] [2022-12-13 14:00:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951195282] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:36,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:36,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 14:00:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309161041] [2022-12-13 14:00:36,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:36,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:00:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:00:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:00:37,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 616 [2022-12-13 14:00:37,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 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 14:00:37,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:37,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 616 [2022-12-13 14:00:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:39,609 INFO L130 PetriNetUnfolder]: 1817/2985 cut-off events. [2022-12-13 14:00:39,609 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 14:00:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 2985 events. 1817/2985 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 17085 event pairs, 1540 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 6040. Up to 749 conditions per place. [2022-12-13 14:00:39,627 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 132 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2022-12-13 14:00:39,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 145 transitions, 676 flow [2022-12-13 14:00:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:00:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:00:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1615 transitions. [2022-12-13 14:00:39,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43695887445887444 [2022-12-13 14:00:39,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1615 transitions. [2022-12-13 14:00:39,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1615 transitions. [2022-12-13 14:00:39,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:39,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1615 transitions. [2022-12-13 14:00:39,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.1666666666667) internal successors, (1615), 6 states have internal predecessors, (1615), 0 states have call successors, (0), 0 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 14:00:39,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 616.0) internal successors, (4312), 7 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 14:00:39,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 616.0) internal successors, (4312), 7 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 14:00:39,638 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 119 flow. Second operand 6 states and 1615 transitions. [2022-12-13 14:00:39,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 145 transitions, 676 flow [2022-12-13 14:00:39,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 145 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:39,640 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 207 flow [2022-12-13 14:00:39,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-12-13 14:00:39,640 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2022-12-13 14:00:39,641 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 207 flow [2022-12-13 14:00:39,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 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 14:00:39,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:39,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:00:39,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:39,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:39,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1080296936, now seen corresponding path program 1 times [2022-12-13 14:00:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880942164] [2022-12-13 14:00:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:39,844 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 14:00:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:39,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:39,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:39,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:00:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:39,973 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 14:00:39,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:40,005 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 14:00:40,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:40,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880942164] [2022-12-13 14:00:40,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880942164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:40,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:40,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-13 14:00:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769459123] [2022-12-13 14:00:40,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:40,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:00:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:00:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:00:40,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 616 [2022-12-13 14:00:40,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 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 14:00:40,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:40,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 616 [2022-12-13 14:00:40,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:40,689 INFO L130 PetriNetUnfolder]: 455/756 cut-off events. [2022-12-13 14:00:40,689 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:00:40,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 756 events. 455/756 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3293 event pairs, 385 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1560. Up to 747 conditions per place. [2022-12-13 14:00:40,692 INFO L137 encePairwiseOnDemand]: 607/616 looper letters, 34 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2022-12-13 14:00:40,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 275 flow [2022-12-13 14:00:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:00:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:00:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1546 transitions. [2022-12-13 14:00:40,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41829004329004327 [2022-12-13 14:00:40,695 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1546 transitions. [2022-12-13 14:00:40,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1546 transitions. [2022-12-13 14:00:40,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:40,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1546 transitions. [2022-12-13 14:00:40,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.6666666666667) internal successors, (1546), 6 states have internal predecessors, (1546), 0 states have call successors, (0), 0 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 14:00:40,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 616.0) internal successors, (4312), 7 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 14:00:40,703 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 616.0) internal successors, (4312), 7 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 14:00:40,703 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 207 flow. Second operand 6 states and 1546 transitions. [2022-12-13 14:00:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 275 flow [2022-12-13 14:00:40,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:00:40,706 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 223 flow [2022-12-13 14:00:40,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2022-12-13 14:00:40,706 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-12-13 14:00:40,707 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 223 flow [2022-12-13 14:00:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 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 14:00:40,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:40,708 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 14:00:40,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:00:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:40,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -873174920, now seen corresponding path program 2 times [2022-12-13 14:00:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:40,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940082988] [2022-12-13 14:00:40,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:00:40,909 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 14:00:40,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:40,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:40,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:40,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:00:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:00:40,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:00:40,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:41,016 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:00:41,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:00:41,103 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 14:00:41,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:41,460 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 14:00:41,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940082988] [2022-12-13 14:00:41,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940082988] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:41,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:41,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 14:00:41,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659105461] [2022-12-13 14:00:41,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:41,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:00:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:00:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:00:45,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 616 [2022-12-13 14:00:45,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 14:00:45,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:45,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 616 [2022-12-13 14:00:45,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:46,031 INFO L130 PetriNetUnfolder]: 909/1501 cut-off events. [2022-12-13 14:00:46,031 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-12-13 14:00:46,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1501 events. 909/1501 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 7438 event pairs, 770 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3096. Up to 749 conditions per place. [2022-12-13 14:00:46,036 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 68 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2022-12-13 14:00:46,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 497 flow [2022-12-13 14:00:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:00:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:00:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1791 transitions. [2022-12-13 14:00:46,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41535250463821893 [2022-12-13 14:00:46,039 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1791 transitions. [2022-12-13 14:00:46,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1791 transitions. [2022-12-13 14:00:46,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:46,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1791 transitions. [2022-12-13 14:00:46,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 255.85714285714286) internal successors, (1791), 7 states have internal predecessors, (1791), 0 states have call successors, (0), 0 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 14:00:46,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 616.0) internal successors, (4928), 8 states have internal predecessors, (4928), 0 states have call successors, (0), 0 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 14:00:46,047 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 616.0) internal successors, (4928), 8 states have internal predecessors, (4928), 0 states have call successors, (0), 0 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 14:00:46,048 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 223 flow. Second operand 7 states and 1791 transitions. [2022-12-13 14:00:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 497 flow [2022-12-13 14:00:46,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-12-13 14:00:46,050 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 239 flow [2022-12-13 14:00:46,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-12-13 14:00:46,050 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-12-13 14:00:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 239 flow [2022-12-13 14:00:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 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 14:00:46,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:46,051 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2022-12-13 14:00:46,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:46,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:46,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1298613594, now seen corresponding path program 3 times [2022-12-13 14:00:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:46,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689205602] [2022-12-13 14:00:46,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:00:46,253 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 14:00:46,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:46,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:46,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:46,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:00:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:00:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:00:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:00:46,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:00:46,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:46,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689205602] [2022-12-13 14:00:46,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689205602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:46,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:46,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 14:00:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028158125] [2022-12-13 14:00:46,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:46,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:00:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:00:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:00:48,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 616 [2022-12-13 14:00:48,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 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 14:00:48,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:48,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 616 [2022-12-13 14:00:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:48,448 INFO L130 PetriNetUnfolder]: 453/754 cut-off events. [2022-12-13 14:00:48,448 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 14:00:48,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 754 events. 453/754 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3288 event pairs, 385 based on Foata normal form. 6/276 useless extension candidates. Maximal degree in co-relation 1565. Up to 744 conditions per place. [2022-12-13 14:00:48,451 INFO L137 encePairwiseOnDemand]: 607/616 looper letters, 32 selfloop transitions, 12 changer transitions 0/44 dead transitions. [2022-12-13 14:00:48,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 285 flow [2022-12-13 14:00:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:00:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:00:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2036 transitions. [2022-12-13 14:00:48,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41314935064935066 [2022-12-13 14:00:48,457 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2036 transitions. [2022-12-13 14:00:48,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2036 transitions. [2022-12-13 14:00:48,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:48,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2036 transitions. [2022-12-13 14:00:48,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.5) internal successors, (2036), 8 states have internal predecessors, (2036), 0 states have call successors, (0), 0 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 14:00:48,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:00:48,469 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:00:48,470 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 239 flow. Second operand 8 states and 2036 transitions. [2022-12-13 14:00:48,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 285 flow [2022-12-13 14:00:48,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 245 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-12-13 14:00:48,472 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 191 flow [2022-12-13 14:00:48,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-12-13 14:00:48,472 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2022-12-13 14:00:48,473 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 191 flow [2022-12-13 14:00:48,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 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 14:00:48,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:48,474 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2022-12-13 14:00:48,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:00:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:48,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1096646744, now seen corresponding path program 2 times [2022-12-13 14:00:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:48,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934766952] [2022-12-13 14:00:48,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:00:48,679 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 14:00:48,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:48,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:48,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:48,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:00:48,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:00:48,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:00:48,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:48,840 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:00:48,840 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 14:00:48,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 14:00:49,002 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:00:49,002 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-13 14:00:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:49,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:49,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:49,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934766952] [2022-12-13 14:00:49,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934766952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:49,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:49,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:00:49,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797914426] [2022-12-13 14:00:49,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:49,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:00:49,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:00:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:00:49,501 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 616 [2022-12-13 14:00:49,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 253.25) internal successors, (1013), 4 states have internal predecessors, (1013), 0 states have call successors, (0), 0 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 14:00:49,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:49,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 616 [2022-12-13 14:00:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:49,843 INFO L130 PetriNetUnfolder]: 341/585 cut-off events. [2022-12-13 14:00:49,843 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 14:00:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 585 events. 341/585 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2429 event pairs, 288 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1219. Up to 579 conditions per place. [2022-12-13 14:00:49,846 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-12-13 14:00:49,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 261 flow [2022-12-13 14:00:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:00:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:00:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1044 transitions. [2022-12-13 14:00:49,849 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4237012987012987 [2022-12-13 14:00:49,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1044 transitions. [2022-12-13 14:00:49,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1044 transitions. [2022-12-13 14:00:49,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:49,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1044 transitions. [2022-12-13 14:00:49,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 14:00:49,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:49,856 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:49,856 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 191 flow. Second operand 4 states and 1044 transitions. [2022-12-13 14:00:49,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 261 flow [2022-12-13 14:00:49,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 42 transitions, 236 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 14:00:49,858 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 156 flow [2022-12-13 14:00:49,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2022-12-13 14:00:49,859 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2022-12-13 14:00:49,859 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 156 flow [2022-12-13 14:00:49,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 253.25) internal successors, (1013), 4 states have internal predecessors, (1013), 0 states have call successors, (0), 0 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 14:00:49,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:49,860 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2022-12-13 14:00:49,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:00:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:50,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1096646745, now seen corresponding path program 1 times [2022-12-13 14:00:50,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:50,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059875899] [2022-12-13 14:00:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:50,065 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 14:00:50,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:50,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:50,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:50,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:00:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:50,309 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-13 14:00:50,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 14:00:50,395 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:00:50,395 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 14:00:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:50,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:50,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059875899] [2022-12-13 14:00:50,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059875899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:50,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:50,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:00:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340692697] [2022-12-13 14:00:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:50,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 616 [2022-12-13 14:00:50,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 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 14:00:50,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:50,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 616 [2022-12-13 14:00:50,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:50,798 INFO L130 PetriNetUnfolder]: 229/416 cut-off events. [2022-12-13 14:00:50,798 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 14:00:50,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 416 events. 229/416 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1594 event pairs, 191 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 866. Up to 416 conditions per place. [2022-12-13 14:00:50,800 INFO L137 encePairwiseOnDemand]: 613/616 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 14:00:50,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 222 flow [2022-12-13 14:00:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2022-12-13 14:00:50,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4291125541125541 [2022-12-13 14:00:50,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2022-12-13 14:00:50,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2022-12-13 14:00:50,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:50,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2022-12-13 14:00:50,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 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 14:00:50,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:50,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:50,806 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 156 flow. Second operand 3 states and 793 transitions. [2022-12-13 14:00:50,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 222 flow [2022-12-13 14:00:50,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:50,808 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 141 flow [2022-12-13 14:00:50,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-12-13 14:00:50,809 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2022-12-13 14:00:50,809 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 141 flow [2022-12-13 14:00:50,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 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 14:00:50,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:50,809 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-13 14:00:50,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1610507644, now seen corresponding path program 1 times [2022-12-13 14:00:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403854528] [2022-12-13 14:00:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:51,014 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 14:00:51,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:51,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:51,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:00:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:51,253 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 14:00:51,253 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-13 14:00:51,277 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:00:51,277 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 14:00:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:51,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:51,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:51,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403854528] [2022-12-13 14:00:51,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403854528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:51,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:51,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:00:51,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775954608] [2022-12-13 14:00:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:51,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:00:51,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:00:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:00:51,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 616 [2022-12-13 14:00:51,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 14:00:51,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:51,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 616 [2022-12-13 14:00:51,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:51,511 INFO L130 PetriNetUnfolder]: 214/386 cut-off events. [2022-12-13 14:00:51,511 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 14:00:51,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 386 events. 214/386 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1477 event pairs, 178 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 806. Up to 386 conditions per place. [2022-12-13 14:00:51,514 INFO L137 encePairwiseOnDemand]: 613/616 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 14:00:51,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 213 flow [2022-12-13 14:00:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:00:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:00:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 785 transitions. [2022-12-13 14:00:51,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42478354978354976 [2022-12-13 14:00:51,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 785 transitions. [2022-12-13 14:00:51,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 785 transitions. [2022-12-13 14:00:51,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:51,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 785 transitions. [2022-12-13 14:00:51,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 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 14:00:51,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:51,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 616.0) internal successors, (2464), 4 states have internal predecessors, (2464), 0 states have call successors, (0), 0 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 14:00:51,518 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 141 flow. Second operand 3 states and 785 transitions. [2022-12-13 14:00:51,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 213 flow [2022-12-13 14:00:51,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:00:51,519 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 138 flow [2022-12-13 14:00:51,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2022-12-13 14:00:51,520 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-12-13 14:00:51,520 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 138 flow [2022-12-13 14:00:51,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 14:00:51,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:51,520 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-13 14:00:51,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1610507642, now seen corresponding path program 1 times [2022-12-13 14:00:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472479723] [2022-12-13 14:00:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:51,725 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 14:00:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:51,728 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:00:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:51,946 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:00:51,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 14:00:51,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 14:00:51,999 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 14:00:52,000 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-13 14:00:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:52,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:52,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:52,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472479723] [2022-12-13 14:00:52,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472479723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:52,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:52,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:00:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74569148] [2022-12-13 14:00:52,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:00:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:00:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:00:52,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 616 [2022-12-13 14:00:52,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 14:00:52,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:52,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 616 [2022-12-13 14:00:52,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:52,485 INFO L130 PetriNetUnfolder]: 199/356 cut-off events. [2022-12-13 14:00:52,485 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 14:00:52,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 356 events. 199/356 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1326 event pairs, 165 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 746. Up to 350 conditions per place. [2022-12-13 14:00:52,487 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 34 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-12-13 14:00:52,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 206 flow [2022-12-13 14:00:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:00:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:00:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1038 transitions. [2022-12-13 14:00:52,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4212662337662338 [2022-12-13 14:00:52,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1038 transitions. [2022-12-13 14:00:52,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1038 transitions. [2022-12-13 14:00:52,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:52,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1038 transitions. [2022-12-13 14:00:52,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.5) internal successors, (1038), 4 states have internal predecessors, (1038), 0 states have call successors, (0), 0 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 14:00:52,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:52,495 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:52,495 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 138 flow. Second operand 4 states and 1038 transitions. [2022-12-13 14:00:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 206 flow [2022-12-13 14:00:52,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:00:52,497 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 137 flow [2022-12-13 14:00:52,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2022-12-13 14:00:52,497 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-12-13 14:00:52,498 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 137 flow [2022-12-13 14:00:52,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 14:00:52,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:52,498 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:52,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:52,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:52,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1613873089, now seen corresponding path program 1 times [2022-12-13 14:00:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923235925] [2022-12-13 14:00:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:52,702 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 14:00:52,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:52,705 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:52,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:00:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:52,926 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:00:52,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:00:52,951 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 14:00:52,951 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 14:00:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:52,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:52,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923235925] [2022-12-13 14:00:52,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923235925] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:52,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:52,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:00:52,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304194746] [2022-12-13 14:00:52,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:52,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:00:52,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:00:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:00:53,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 616 [2022-12-13 14:00:53,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 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 14:00:53,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:53,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 616 [2022-12-13 14:00:53,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:53,312 INFO L130 PetriNetUnfolder]: 153/278 cut-off events. [2022-12-13 14:00:53,312 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 14:00:53,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 278 events. 153/278 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 928 event pairs, 123 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 590. Up to 272 conditions per place. [2022-12-13 14:00:53,313 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 32 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-12-13 14:00:53,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 201 flow [2022-12-13 14:00:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:00:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:00:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1004 transitions. [2022-12-13 14:00:53,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4074675324675325 [2022-12-13 14:00:53,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1004 transitions. [2022-12-13 14:00:53,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1004 transitions. [2022-12-13 14:00:53,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:53,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1004 transitions. [2022-12-13 14:00:53,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 14:00:53,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:53,318 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:53,318 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 137 flow. Second operand 4 states and 1004 transitions. [2022-12-13 14:00:53,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 201 flow [2022-12-13 14:00:53,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:53,319 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 134 flow [2022-12-13 14:00:53,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2022-12-13 14:00:53,319 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2022-12-13 14:00:53,319 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 134 flow [2022-12-13 14:00:53,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 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 14:00:53,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:53,320 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:53,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:00:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:53,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1613873090, now seen corresponding path program 1 times [2022-12-13 14:00:53,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:53,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602574328] [2022-12-13 14:00:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:53,523 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 14:00:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:53,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:53,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:00:53,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:53,778 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:00:53,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:00:53,828 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:00:53,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:00:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:53,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:00:53,885 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:00:53,885 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 13 treesize of output 13 [2022-12-13 14:00:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:53,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:53,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:53,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602574328] [2022-12-13 14:00:53,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602574328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:53,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:53,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:00:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762508872] [2022-12-13 14:00:53,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:53,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:00:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:00:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:00:54,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 616 [2022-12-13 14:00:54,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 0 states have call successors, (0), 0 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 14:00:54,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:54,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 616 [2022-12-13 14:00:54,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:54,491 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2022-12-13 14:00:54,491 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:00:54,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 474 events. 265/474 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2054 event pairs, 123 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 988. Up to 272 conditions per place. [2022-12-13 14:00:54,493 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 48 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2022-12-13 14:00:54,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 277 flow [2022-12-13 14:00:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:00:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:00:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1260 transitions. [2022-12-13 14:00:54,495 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2022-12-13 14:00:54,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1260 transitions. [2022-12-13 14:00:54,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1260 transitions. [2022-12-13 14:00:54,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:54,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1260 transitions. [2022-12-13 14:00:54,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 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 14:00:54,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:54,498 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:54,499 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 134 flow. Second operand 5 states and 1260 transitions. [2022-12-13 14:00:54,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 277 flow [2022-12-13 14:00:54,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:54,500 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 147 flow [2022-12-13 14:00:54,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2022-12-13 14:00:54,500 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-12-13 14:00:54,500 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 147 flow [2022-12-13 14:00:54,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 0 states have call successors, (0), 0 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 14:00:54,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:54,500 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:54,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:54,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1613873135, now seen corresponding path program 1 times [2022-12-13 14:00:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:54,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039679059] [2022-12-13 14:00:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:54,704 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 14:00:54,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:54,707 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:54,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:54,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:00:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:54,898 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 14:00:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:54,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:54,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:54,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039679059] [2022-12-13 14:00:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039679059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:54,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:54,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:00:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763284042] [2022-12-13 14:00:54,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:54,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:00:54,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:00:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:00:55,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 616 [2022-12-13 14:00:55,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 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 14:00:55,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:55,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 616 [2022-12-13 14:00:55,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:55,286 INFO L130 PetriNetUnfolder]: 191/348 cut-off events. [2022-12-13 14:00:55,286 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2022-12-13 14:00:55,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 348 events. 191/348 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1251 event pairs, 155 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 795. Up to 336 conditions per place. [2022-12-13 14:00:55,287 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-12-13 14:00:55,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 33 transitions, 209 flow [2022-12-13 14:00:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:00:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:00:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2022-12-13 14:00:55,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40665584415584416 [2022-12-13 14:00:55,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2022-12-13 14:00:55,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2022-12-13 14:00:55,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:55,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2022-12-13 14:00:55,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 0 states have call successors, (0), 0 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 14:00:55,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:55,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:00:55,292 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 147 flow. Second operand 4 states and 1002 transitions. [2022-12-13 14:00:55,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 33 transitions, 209 flow [2022-12-13 14:00:55,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 203 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:00:55,293 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 141 flow [2022-12-13 14:00:55,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-12-13 14:00:55,293 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-12-13 14:00:55,293 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 141 flow [2022-12-13 14:00:55,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 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 14:00:55,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:55,294 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:55,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:55,495 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:55,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1613873137, now seen corresponding path program 1 times [2022-12-13 14:00:55,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:55,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975303873] [2022-12-13 14:00:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:55,496 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 14:00:55,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:55,498 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:55,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:00:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:55,660 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:00:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:55,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:55,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:55,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975303873] [2022-12-13 14:00:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975303873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:55,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:00:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692554470] [2022-12-13 14:00:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:00:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:00:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:00:56,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 616 [2022-12-13 14:00:56,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 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 14:00:56,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:56,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 616 [2022-12-13 14:00:56,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:56,261 INFO L130 PetriNetUnfolder]: 174/319 cut-off events. [2022-12-13 14:00:56,261 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-12-13 14:00:56,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 319 events. 174/319 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1172 event pairs, 87 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 724. Up to 198 conditions per place. [2022-12-13 14:00:56,262 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2022-12-13 14:00:56,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 266 flow [2022-12-13 14:00:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:00:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:00:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1275 transitions. [2022-12-13 14:00:56,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.413961038961039 [2022-12-13 14:00:56,265 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1275 transitions. [2022-12-13 14:00:56,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1275 transitions. [2022-12-13 14:00:56,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:56,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1275 transitions. [2022-12-13 14:00:56,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 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 14:00:56,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:56,268 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:56,269 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 141 flow. Second operand 5 states and 1275 transitions. [2022-12-13 14:00:56,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 266 flow [2022-12-13 14:00:56,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:00:56,270 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 150 flow [2022-12-13 14:00:56,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2022-12-13 14:00:56,270 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2022-12-13 14:00:56,270 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 150 flow [2022-12-13 14:00:56,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 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 14:00:56,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:56,271 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:56,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:56,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:56,472 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:56,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash 447242178, now seen corresponding path program 1 times [2022-12-13 14:00:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057106026] [2022-12-13 14:00:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:56,474 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 14:00:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:56,477 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:56,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:00:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:56,760 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:00:56,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:00:56,803 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:00:56,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:00:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:00:56,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:00:56,862 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:00:56,862 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 13 treesize of output 13 [2022-12-13 14:00:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:56,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:56,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057106026] [2022-12-13 14:00:56,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057106026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:56,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:56,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:00:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887755398] [2022-12-13 14:00:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:56,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:00:56,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:00:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:00:57,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 616 [2022-12-13 14:00:57,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 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 14:00:57,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:57,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 616 [2022-12-13 14:00:57,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:57,434 INFO L130 PetriNetUnfolder]: 267/482 cut-off events. [2022-12-13 14:00:57,434 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-12-13 14:00:57,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 482 events. 267/482 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1981 event pairs, 140 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 1147. Up to 313 conditions per place. [2022-12-13 14:00:57,437 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 44 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2022-12-13 14:00:57,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 294 flow [2022-12-13 14:00:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:00:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:00:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1254 transitions. [2022-12-13 14:00:57,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2022-12-13 14:00:57,442 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1254 transitions. [2022-12-13 14:00:57,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1254 transitions. [2022-12-13 14:00:57,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:57,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1254 transitions. [2022-12-13 14:00:57,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.8) internal successors, (1254), 5 states have internal predecessors, (1254), 0 states have call successors, (0), 0 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 14:00:57,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:57,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:57,446 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 150 flow. Second operand 5 states and 1254 transitions. [2022-12-13 14:00:57,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 294 flow [2022-12-13 14:00:57,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 282 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:00:57,448 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 158 flow [2022-12-13 14:00:57,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2022-12-13 14:00:57,448 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2022-12-13 14:00:57,448 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 158 flow [2022-12-13 14:00:57,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 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 14:00:57,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:57,449 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:57,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:57,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:57,650 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 447242131, now seen corresponding path program 1 times [2022-12-13 14:00:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607431637] [2022-12-13 14:00:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:57,653 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 14:00:57,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:57,656 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:57,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:57,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:00:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:57,903 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:00:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:57,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:00:57,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:57,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607431637] [2022-12-13 14:00:57,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607431637] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:00:57,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:00:57,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:00:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007277432] [2022-12-13 14:00:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:00:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:00:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:00:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:00:58,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 616 [2022-12-13 14:00:58,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 14:00:58,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:00:58,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 616 [2022-12-13 14:00:58,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:00:58,540 INFO L130 PetriNetUnfolder]: 236/429 cut-off events. [2022-12-13 14:00:58,540 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-12-13 14:00:58,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 429 events. 236/429 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1646 event pairs, 140 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 1103. Up to 307 conditions per place. [2022-12-13 14:00:58,541 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2022-12-13 14:00:58,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 292 flow [2022-12-13 14:00:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:00:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:00:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1273 transitions. [2022-12-13 14:00:58,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4133116883116883 [2022-12-13 14:00:58,543 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1273 transitions. [2022-12-13 14:00:58,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1273 transitions. [2022-12-13 14:00:58,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:00:58,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1273 transitions. [2022-12-13 14:00:58,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 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 14:00:58,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:58,547 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:00:58,547 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 158 flow. Second operand 5 states and 1273 transitions. [2022-12-13 14:00:58,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 292 flow [2022-12-13 14:00:58,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:00:58,548 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 164 flow [2022-12-13 14:00:58,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2022-12-13 14:00:58,549 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2022-12-13 14:00:58,549 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 164 flow [2022-12-13 14:00:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 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 14:00:58,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:00:58,549 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:00:58,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:00:58,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:58,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:00:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:00:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash 448924598, now seen corresponding path program 1 times [2022-12-13 14:00:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:00:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818546025] [2022-12-13 14:00:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:00:58,753 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 14:00:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:00:58,756 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:58,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:00:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:00:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:00:58,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:00:58,976 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:00:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:59,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:00:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:00:59,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:00:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818546025] [2022-12-13 14:00:59,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818546025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:00:59,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:00:59,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 14:00:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706901045] [2022-12-13 14:00:59,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:00:59,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:00:59,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:00:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:00:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:01:01,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 616 [2022-12-13 14:01:01,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 247.8) internal successors, (2478), 10 states have internal predecessors, (2478), 0 states have call successors, (0), 0 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 14:01:01,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:01,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 616 [2022-12-13 14:01:01,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:01,860 INFO L130 PetriNetUnfolder]: 554/993 cut-off events. [2022-12-13 14:01:01,860 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2022-12-13 14:01:01,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 993 events. 554/993 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4537 event pairs, 123 based on Foata normal form. 48/909 useless extension candidates. Maximal degree in co-relation 2645. Up to 268 conditions per place. [2022-12-13 14:01:01,863 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 93 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2022-12-13 14:01:01,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 584 flow [2022-12-13 14:01:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:01:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:01:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2058 transitions. [2022-12-13 14:01:01,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2022-12-13 14:01:01,866 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2058 transitions. [2022-12-13 14:01:01,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2058 transitions. [2022-12-13 14:01:01,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:01,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2058 transitions. [2022-12-13 14:01:01,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 257.25) internal successors, (2058), 8 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 14:01:01,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:01,871 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:01,871 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 164 flow. Second operand 8 states and 2058 transitions. [2022-12-13 14:01:01,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 584 flow [2022-12-13 14:01:01,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 100 transitions, 560 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:01:01,873 INFO L231 Difference]: Finished difference. Result has 57 places, 37 transitions, 196 flow [2022-12-13 14:01:01,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=196, PETRI_PLACES=57, PETRI_TRANSITIONS=37} [2022-12-13 14:01:01,873 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2022-12-13 14:01:01,873 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 37 transitions, 196 flow [2022-12-13 14:01:01,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 247.8) internal successors, (2478), 10 states have internal predecessors, (2478), 0 states have call successors, (0), 0 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 14:01:01,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:01,874 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:01,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:02,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:02,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash 448924551, now seen corresponding path program 1 times [2022-12-13 14:01:02,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:02,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767625198] [2022-12-13 14:01:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:02,078 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 14:01:02,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:02,080 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:02,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:01:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:02,425 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:01:02,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:01:02,475 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:01:02,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:01:02,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:01:02,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:01:02,544 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:01:02,545 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 13 treesize of output 13 [2022-12-13 14:01:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:02,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:05,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767625198] [2022-12-13 14:01:05,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767625198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:05,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:05,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 14:01:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609330191] [2022-12-13 14:01:05,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:05,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:01:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:01:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:01:08,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:01:11,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:01:12,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 616 [2022-12-13 14:01:12,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 37 transitions, 196 flow. Second operand has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 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 14:01:12,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:12,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 616 [2022-12-13 14:01:12,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:13,478 INFO L130 PetriNetUnfolder]: 485/876 cut-off events. [2022-12-13 14:01:13,478 INFO L131 PetriNetUnfolder]: For 699/699 co-relation queries the response was YES. [2022-12-13 14:01:13,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 876 events. 485/876 cut-off events. For 699/699 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3859 event pairs, 81 based on Foata normal form. 48/798 useless extension candidates. Maximal degree in co-relation 2412. Up to 227 conditions per place. [2022-12-13 14:01:13,481 INFO L137 encePairwiseOnDemand]: 609/616 looper letters, 87 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2022-12-13 14:01:13,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 570 flow [2022-12-13 14:01:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:01:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:01:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2006 transitions. [2022-12-13 14:01:13,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4070616883116883 [2022-12-13 14:01:13,485 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2006 transitions. [2022-12-13 14:01:13,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2006 transitions. [2022-12-13 14:01:13,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:13,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2006 transitions. [2022-12-13 14:01:13,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 250.75) internal successors, (2006), 8 states have internal predecessors, (2006), 0 states have call successors, (0), 0 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 14:01:13,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:13,490 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:13,490 INFO L175 Difference]: Start difference. First operand has 57 places, 37 transitions, 196 flow. Second operand 8 states and 2006 transitions. [2022-12-13 14:01:13,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 570 flow [2022-12-13 14:01:13,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 559 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 14:01:13,492 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 230 flow [2022-12-13 14:01:13,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2022-12-13 14:01:13,492 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2022-12-13 14:01:13,492 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 230 flow [2022-12-13 14:01:13,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 242.0) internal successors, (2420), 10 states have internal predecessors, (2420), 0 states have call successors, (0), 0 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 14:01:13,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:13,493 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:13,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Ended with exit code 0 [2022-12-13 14:01:13,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:13,694 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:13,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:13,695 INFO L85 PathProgramCache]: Analyzing trace with hash 979611337, now seen corresponding path program 1 times [2022-12-13 14:01:13,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:13,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862952607] [2022-12-13 14:01:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:13,699 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 14:01:13,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:13,702 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:13,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:13,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:01:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:13,909 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:01:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:14,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862952607] [2022-12-13 14:01:14,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862952607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:14,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:14,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 14:01:14,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281740383] [2022-12-13 14:01:14,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:14,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:01:14,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:01:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:01:16,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 616 [2022-12-13 14:01:16,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 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 14:01:16,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:16,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 616 [2022-12-13 14:01:16,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:17,240 INFO L130 PetriNetUnfolder]: 1043/1832 cut-off events. [2022-12-13 14:01:17,240 INFO L131 PetriNetUnfolder]: For 2807/2807 co-relation queries the response was YES. [2022-12-13 14:01:17,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5539 conditions, 1832 events. 1043/1832 cut-off events. For 2807/2807 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9573 event pairs, 237 based on Foata normal form. 138/1786 useless extension candidates. Maximal degree in co-relation 5513. Up to 524 conditions per place. [2022-12-13 14:01:17,246 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 104 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2022-12-13 14:01:17,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 910 flow [2022-12-13 14:01:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:01:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:01:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2050 transitions. [2022-12-13 14:01:17,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4159902597402597 [2022-12-13 14:01:17,250 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2050 transitions. [2022-12-13 14:01:17,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2050 transitions. [2022-12-13 14:01:17,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:17,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2050 transitions. [2022-12-13 14:01:17,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 256.25) internal successors, (2050), 8 states have internal predecessors, (2050), 0 states have call successors, (0), 0 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 14:01:17,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:17,256 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:17,256 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 230 flow. Second operand 8 states and 2050 transitions. [2022-12-13 14:01:17,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 910 flow [2022-12-13 14:01:17,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 787 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-12-13 14:01:17,259 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 256 flow [2022-12-13 14:01:17,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2022-12-13 14:01:17,259 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2022-12-13 14:01:17,259 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 256 flow [2022-12-13 14:01:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 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 14:01:17,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:17,260 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:17,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:17,461 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash 979611384, now seen corresponding path program 1 times [2022-12-13 14:01:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857307250] [2022-12-13 14:01:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:17,464 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 14:01:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:17,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:17,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:01:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:17,890 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:01:17,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:01:17,941 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:01:17,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:01:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:01:18,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:01:18,010 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:01:18,010 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 13 treesize of output 13 [2022-12-13 14:01:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:18,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:18,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857307250] [2022-12-13 14:01:18,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857307250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:18,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:18,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 14:01:18,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797038848] [2022-12-13 14:01:18,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:18,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:01:18,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:18,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:01:18,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:01:22,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 616 [2022-12-13 14:01:22,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 256 flow. Second operand has 10 states, 10 states have (on average 244.2) internal successors, (2442), 10 states have internal predecessors, (2442), 0 states have call successors, (0), 0 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 14:01:22,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:22,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 616 [2022-12-13 14:01:22,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:23,675 INFO L130 PetriNetUnfolder]: 869/1566 cut-off events. [2022-12-13 14:01:23,675 INFO L131 PetriNetUnfolder]: For 2042/2042 co-relation queries the response was YES. [2022-12-13 14:01:23,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 1566 events. 869/1566 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8077 event pairs, 299 based on Foata normal form. 138/1676 useless extension candidates. Maximal degree in co-relation 5042. Up to 640 conditions per place. [2022-12-13 14:01:23,680 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 102 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2022-12-13 14:01:23,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 804 flow [2022-12-13 14:01:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:01:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:01:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2015 transitions. [2022-12-13 14:01:23,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.408887987012987 [2022-12-13 14:01:23,684 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2015 transitions. [2022-12-13 14:01:23,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2015 transitions. [2022-12-13 14:01:23,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:23,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2015 transitions. [2022-12-13 14:01:23,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 251.875) internal successors, (2015), 8 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 14:01:23,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:23,689 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:01:23,689 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 256 flow. Second operand 8 states and 2015 transitions. [2022-12-13 14:01:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 804 flow [2022-12-13 14:01:23,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 109 transitions, 783 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-12-13 14:01:23,693 INFO L231 Difference]: Finished difference. Result has 69 places, 41 transitions, 243 flow [2022-12-13 14:01:23,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=69, PETRI_TRANSITIONS=41} [2022-12-13 14:01:23,693 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2022-12-13 14:01:23,693 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 41 transitions, 243 flow [2022-12-13 14:01:23,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.2) internal successors, (2442), 10 states have internal predecessors, (2442), 0 states have call successors, (0), 0 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 14:01:23,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:23,694 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:23,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:23,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:23,895 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -694321901, now seen corresponding path program 2 times [2022-12-13 14:01:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687675422] [2022-12-13 14:01:23,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:23,898 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 14:01:23,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:23,901 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:23,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:24,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:01:24,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:01:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:24,202 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:01:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:24,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:24,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:24,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687675422] [2022-12-13 14:01:24,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687675422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:24,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:24,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 14:01:24,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21025840] [2022-12-13 14:01:24,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:24,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:01:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:01:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:01:30,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 616 [2022-12-13 14:01:30,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 41 transitions, 243 flow. Second operand has 16 states, 16 states have (on average 247.625) internal successors, (3962), 16 states have internal predecessors, (3962), 0 states have call successors, (0), 0 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 14:01:30,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:30,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 616 [2022-12-13 14:01:30,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:31,936 INFO L130 PetriNetUnfolder]: 1061/1906 cut-off events. [2022-12-13 14:01:31,936 INFO L131 PetriNetUnfolder]: For 2350/2350 co-relation queries the response was YES. [2022-12-13 14:01:31,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5817 conditions, 1906 events. 1061/1906 cut-off events. For 2350/2350 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10244 event pairs, 237 based on Foata normal form. 46/1918 useless extension candidates. Maximal degree in co-relation 5793. Up to 524 conditions per place. [2022-12-13 14:01:31,943 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 133 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2022-12-13 14:01:31,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 142 transitions, 1033 flow [2022-12-13 14:01:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:01:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 14:01:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2560 transitions. [2022-12-13 14:01:31,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2022-12-13 14:01:31,948 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2560 transitions. [2022-12-13 14:01:31,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2560 transitions. [2022-12-13 14:01:31,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:31,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2560 transitions. [2022-12-13 14:01:31,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 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 14:01:31,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 616.0) internal successors, (6776), 11 states have internal predecessors, (6776), 0 states have call successors, (0), 0 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 14:01:31,955 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 616.0) internal successors, (6776), 11 states have internal predecessors, (6776), 0 states have call successors, (0), 0 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 14:01:31,955 INFO L175 Difference]: Start difference. First operand has 69 places, 41 transitions, 243 flow. Second operand 10 states and 2560 transitions. [2022-12-13 14:01:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 142 transitions, 1033 flow [2022-12-13 14:01:31,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 142 transitions, 1017 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 14:01:31,966 INFO L231 Difference]: Finished difference. Result has 73 places, 43 transitions, 266 flow [2022-12-13 14:01:31,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=266, PETRI_PLACES=73, PETRI_TRANSITIONS=43} [2022-12-13 14:01:31,966 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2022-12-13 14:01:31,966 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 43 transitions, 266 flow [2022-12-13 14:01:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 247.625) internal successors, (3962), 16 states have internal predecessors, (3962), 0 states have call successors, (0), 0 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 14:01:31,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:31,967 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:31,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Ended with exit code 0 [2022-12-13 14:01:32,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:32,168 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash -694321854, now seen corresponding path program 2 times [2022-12-13 14:01:32,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:32,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132468458] [2022-12-13 14:01:32,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:32,171 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 14:01:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:32,174 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:32,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:32,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:01:32,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:01:32,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:32,502 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:01:32,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:01:32,536 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:01:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:01:32,594 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:01:32,594 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 13 treesize of output 13 [2022-12-13 14:01:32,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:01:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 14:01:32,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:32,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:32,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132468458] [2022-12-13 14:01:32,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132468458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:32,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:32,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:01:32,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484146053] [2022-12-13 14:01:32,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:32,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:01:32,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:01:32,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:01:33,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 616 [2022-12-13 14:01:33,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 43 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 244.2) internal successors, (1221), 5 states have internal predecessors, (1221), 0 states have call successors, (0), 0 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 14:01:33,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:33,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 616 [2022-12-13 14:01:33,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:33,635 INFO L130 PetriNetUnfolder]: 889/1612 cut-off events. [2022-12-13 14:01:33,635 INFO L131 PetriNetUnfolder]: For 2313/2313 co-relation queries the response was YES. [2022-12-13 14:01:33,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5150 conditions, 1612 events. 889/1612 cut-off events. For 2313/2313 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8306 event pairs, 815 based on Foata normal form. 88/1700 useless extension candidates. Maximal degree in co-relation 5124. Up to 1600 conditions per place. [2022-12-13 14:01:33,640 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 37 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2022-12-13 14:01:33,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 40 transitions, 327 flow [2022-12-13 14:01:33,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:01:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:01:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1234 transitions. [2022-12-13 14:01:33,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40064935064935064 [2022-12-13 14:01:33,642 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1234 transitions. [2022-12-13 14:01:33,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1234 transitions. [2022-12-13 14:01:33,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:33,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1234 transitions. [2022-12-13 14:01:33,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 0 states have call successors, (0), 0 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 14:01:33,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:01:33,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 616.0) internal successors, (3696), 6 states have internal predecessors, (3696), 0 states have call successors, (0), 0 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 14:01:33,645 INFO L175 Difference]: Start difference. First operand has 73 places, 43 transitions, 266 flow. Second operand 5 states and 1234 transitions. [2022-12-13 14:01:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 40 transitions, 327 flow [2022-12-13 14:01:33,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 40 transitions, 308 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-12-13 14:01:33,648 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 234 flow [2022-12-13 14:01:33,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2022-12-13 14:01:33,648 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2022-12-13 14:01:33,648 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 234 flow [2022-12-13 14:01:33,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.2) internal successors, (1221), 5 states have internal predecessors, (1221), 0 states have call successors, (0), 0 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 14:01:33,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:33,649 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:33,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:33,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:33,849 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash -49135287, now seen corresponding path program 3 times [2022-12-13 14:01:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:33,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766253871] [2022-12-13 14:01:33,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:01:33,850 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 14:01:33,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:33,851 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:33,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:34,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:01:34,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:01:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:34,314 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:01:34,447 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 13 treesize of output 9 [2022-12-13 14:01:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:34,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:34,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766253871] [2022-12-13 14:01:34,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766253871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:34,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:34,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2022-12-13 14:01:34,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666519916] [2022-12-13 14:01:34,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:34,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:01:34,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:01:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:01:39,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 616 [2022-12-13 14:01:39,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 234 flow. Second operand has 16 states, 16 states have (on average 247.75) internal successors, (3964), 16 states have internal predecessors, (3964), 0 states have call successors, (0), 0 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 14:01:39,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:39,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 616 [2022-12-13 14:01:39,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:41,014 INFO L130 PetriNetUnfolder]: 784/1463 cut-off events. [2022-12-13 14:01:41,014 INFO L131 PetriNetUnfolder]: For 1574/1574 co-relation queries the response was YES. [2022-12-13 14:01:41,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1463 events. 784/1463 cut-off events. For 1574/1574 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7634 event pairs, 48 based on Foata normal form. 88/1551 useless extension candidates. Maximal degree in co-relation 4161. Up to 264 conditions per place. [2022-12-13 14:01:41,018 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 123 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2022-12-13 14:01:41,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 939 flow [2022-12-13 14:01:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:01:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 14:01:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2550 transitions. [2022-12-13 14:01:41,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.413961038961039 [2022-12-13 14:01:41,021 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2550 transitions. [2022-12-13 14:01:41,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2550 transitions. [2022-12-13 14:01:41,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:41,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2550 transitions. [2022-12-13 14:01:41,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 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 14:01:41,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 616.0) internal successors, (6776), 11 states have internal predecessors, (6776), 0 states have call successors, (0), 0 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 14:01:41,026 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 616.0) internal successors, (6776), 11 states have internal predecessors, (6776), 0 states have call successors, (0), 0 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 14:01:41,027 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 234 flow. Second operand 10 states and 2550 transitions. [2022-12-13 14:01:41,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 939 flow [2022-12-13 14:01:41,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 131 transitions, 921 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 14:01:41,030 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 214 flow [2022-12-13 14:01:41,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=214, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2022-12-13 14:01:41,030 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2022-12-13 14:01:41,036 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 214 flow [2022-12-13 14:01:41,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 247.75) internal successors, (3964), 16 states have internal predecessors, (3964), 0 states have call successors, (0), 0 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 14:01:41,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:41,037 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:41,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:41,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:41,238 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1204879190, now seen corresponding path program 2 times [2022-12-13 14:01:41,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:41,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33404203] [2022-12-13 14:01:41,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:41,239 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 14:01:41,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:41,239 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:41,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:41,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:01:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 14:01:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:41,533 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 14:01:41,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 14:01:41,582 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 14:01:41,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 14:01:41,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:01:41,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 14:01:41,645 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 14:01:41,645 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 13 treesize of output 13 [2022-12-13 14:01:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:41,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:44,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33404203] [2022-12-13 14:01:44,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33404203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:44,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 14:01:44,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455408856] [2022-12-13 14:01:44,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:44,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:01:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:01:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:01:50,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 616 [2022-12-13 14:01:50,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 214 flow. Second operand has 16 states, 16 states have (on average 244.0) internal successors, (3904), 16 states have internal predecessors, (3904), 0 states have call successors, (0), 0 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 14:01:50,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:50,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 616 [2022-12-13 14:01:50,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:52,068 INFO L130 PetriNetUnfolder]: 925/1726 cut-off events. [2022-12-13 14:01:52,068 INFO L131 PetriNetUnfolder]: For 1492/1492 co-relation queries the response was YES. [2022-12-13 14:01:52,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4937 conditions, 1726 events. 925/1726 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 9116 event pairs, 153 based on Foata normal form. 28/1754 useless extension candidates. Maximal degree in co-relation 4917. Up to 338 conditions per place. [2022-12-13 14:01:52,073 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 118 selfloop transitions, 10 changer transitions 0/128 dead transitions. [2022-12-13 14:01:52,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 128 transitions, 814 flow [2022-12-13 14:01:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:01:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 14:01:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2513 transitions. [2022-12-13 14:01:52,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40795454545454546 [2022-12-13 14:01:52,076 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2513 transitions. [2022-12-13 14:01:52,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2513 transitions. [2022-12-13 14:01:52,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:52,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2513 transitions. [2022-12-13 14:01:52,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 251.3) internal successors, (2513), 10 states have internal predecessors, (2513), 0 states have call successors, (0), 0 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 14:01:52,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 616.0) internal successors, (6776), 11 states have internal predecessors, (6776), 0 states have call successors, (0), 0 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 14:01:52,081 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 616.0) internal successors, (6776), 11 states have internal predecessors, (6776), 0 states have call successors, (0), 0 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 14:01:52,081 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 214 flow. Second operand 10 states and 2513 transitions. [2022-12-13 14:01:52,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 128 transitions, 814 flow [2022-12-13 14:01:52,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 128 transitions, 733 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 14:01:52,084 INFO L231 Difference]: Finished difference. Result has 68 places, 40 transitions, 244 flow [2022-12-13 14:01:52,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=68, PETRI_TRANSITIONS=40} [2022-12-13 14:01:52,085 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2022-12-13 14:01:52,085 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 40 transitions, 244 flow [2022-12-13 14:01:52,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 244.0) internal successors, (3904), 16 states have internal predecessors, (3904), 0 states have call successors, (0), 0 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 14:01:52,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:52,087 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:52,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:52,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:52,288 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2129746240, now seen corresponding path program 1 times [2022-12-13 14:01:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:52,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672606190] [2022-12-13 14:01:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:52,289 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 14:01:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:52,291 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:52,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:01:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:52,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:52,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:52,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672606190] [2022-12-13 14:01:52,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672606190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:52,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:52,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:01:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832746903] [2022-12-13 14:01:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:52,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:52,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:52,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:52,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 616 [2022-12-13 14:01:52,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 40 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 14:01:52,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:52,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 616 [2022-12-13 14:01:52,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:52,945 INFO L130 PetriNetUnfolder]: 923/1724 cut-off events. [2022-12-13 14:01:52,945 INFO L131 PetriNetUnfolder]: For 1544/1544 co-relation queries the response was YES. [2022-12-13 14:01:52,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5031 conditions, 1724 events. 923/1724 cut-off events. For 1544/1544 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9302 event pairs, 757 based on Foata normal form. 2/1726 useless extension candidates. Maximal degree in co-relation 5009. Up to 1467 conditions per place. [2022-12-13 14:01:52,949 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 69 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-12-13 14:01:52,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 607 flow [2022-12-13 14:01:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:01:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:01:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1061 transitions. [2022-12-13 14:01:52,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43060064935064934 [2022-12-13 14:01:52,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1061 transitions. [2022-12-13 14:01:52,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1061 transitions. [2022-12-13 14:01:52,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:52,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1061 transitions. [2022-12-13 14:01:52,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 265.25) internal successors, (1061), 4 states have internal predecessors, (1061), 0 states have call successors, (0), 0 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 14:01:52,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:52,954 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:52,954 INFO L175 Difference]: Start difference. First operand has 68 places, 40 transitions, 244 flow. Second operand 4 states and 1061 transitions. [2022-12-13 14:01:52,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 607 flow [2022-12-13 14:01:52,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 563 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-12-13 14:01:52,957 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 242 flow [2022-12-13 14:01:52,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2022-12-13 14:01:52,958 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2022-12-13 14:01:52,958 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 242 flow [2022-12-13 14:01:52,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 14:01:52,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:52,958 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:52,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:53,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:53,159 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1440945990, now seen corresponding path program 2 times [2022-12-13 14:01:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:53,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728137326] [2022-12-13 14:01:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:53,159 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 14:01:53,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:53,160 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:53,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (28)] Waiting until timeout for monitored process [2022-12-13 14:01:53,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:01:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:01:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:53,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:53,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:53,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728137326] [2022-12-13 14:01:53,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728137326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:53,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:53,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:01:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967423841] [2022-12-13 14:01:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:53,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:53,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 616 [2022-12-13 14:01:53,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 14:01:53,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:53,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 616 [2022-12-13 14:01:53,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:53,723 INFO L130 PetriNetUnfolder]: 919/1720 cut-off events. [2022-12-13 14:01:53,723 INFO L131 PetriNetUnfolder]: For 1483/1483 co-relation queries the response was YES. [2022-12-13 14:01:53,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5367 conditions, 1720 events. 919/1720 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 9128 event pairs, 756 based on Foata normal form. 4/1724 useless extension candidates. Maximal degree in co-relation 5344. Up to 1464 conditions per place. [2022-12-13 14:01:53,728 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 63 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2022-12-13 14:01:53,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 480 flow [2022-12-13 14:01:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:01:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:01:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1060 transitions. [2022-12-13 14:01:53,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4301948051948052 [2022-12-13 14:01:53,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1060 transitions. [2022-12-13 14:01:53,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1060 transitions. [2022-12-13 14:01:53,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:53,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1060 transitions. [2022-12-13 14:01:53,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 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 14:01:53,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:53,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:53,732 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 242 flow. Second operand 4 states and 1060 transitions. [2022-12-13 14:01:53,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 480 flow [2022-12-13 14:01:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 464 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 14:01:53,736 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 252 flow [2022-12-13 14:01:53,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2022-12-13 14:01:53,736 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2022-12-13 14:01:53,736 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 252 flow [2022-12-13 14:01:53,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 14:01:53,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:53,736 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:53,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (28)] Ended with exit code 0 [2022-12-13 14:01:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:53,937 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -457580978, now seen corresponding path program 3 times [2022-12-13 14:01:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:53,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515588578] [2022-12-13 14:01:53,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:01:53,938 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 14:01:53,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:53,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:53,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (29)] Waiting until timeout for monitored process [2022-12-13 14:01:54,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 14:01:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:01:54,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:54,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:54,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:54,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515588578] [2022-12-13 14:01:54,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515588578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:54,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:54,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:01:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391162361] [2022-12-13 14:01:54,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:54,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:54,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 616 [2022-12-13 14:01:54,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 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 14:01:54,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:54,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 616 [2022-12-13 14:01:54,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:54,549 INFO L130 PetriNetUnfolder]: 988/1839 cut-off events. [2022-12-13 14:01:54,549 INFO L131 PetriNetUnfolder]: For 2098/2098 co-relation queries the response was YES. [2022-12-13 14:01:54,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5915 conditions, 1839 events. 988/1839 cut-off events. For 2098/2098 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9908 event pairs, 757 based on Foata normal form. 50/1889 useless extension candidates. Maximal degree in co-relation 5890. Up to 1517 conditions per place. [2022-12-13 14:01:54,554 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 72 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2022-12-13 14:01:54,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 625 flow [2022-12-13 14:01:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:01:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:01:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1054 transitions. [2022-12-13 14:01:54,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277597402597403 [2022-12-13 14:01:54,557 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1054 transitions. [2022-12-13 14:01:54,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1054 transitions. [2022-12-13 14:01:54,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:54,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1054 transitions. [2022-12-13 14:01:54,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 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 14:01:54,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:54,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:54,561 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 252 flow. Second operand 4 states and 1054 transitions. [2022-12-13 14:01:54,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 625 flow [2022-12-13 14:01:54,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 615 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:01:54,567 INFO L231 Difference]: Finished difference. Result has 72 places, 44 transitions, 279 flow [2022-12-13 14:01:54,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=72, PETRI_TRANSITIONS=44} [2022-12-13 14:01:54,567 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2022-12-13 14:01:54,567 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 44 transitions, 279 flow [2022-12-13 14:01:54,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 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 14:01:54,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:54,568 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:54,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (29)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:54,769 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:54,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1758199628, now seen corresponding path program 4 times [2022-12-13 14:01:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:54,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627872696] [2022-12-13 14:01:54,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:01:54,772 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 14:01:54,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:54,774 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:54,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (30)] Waiting until timeout for monitored process [2022-12-13 14:01:54,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:01:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:01:55,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:55,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:55,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:55,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627872696] [2022-12-13 14:01:55,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627872696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:55,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:55,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:01:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455760059] [2022-12-13 14:01:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:55,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:55,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 616 [2022-12-13 14:01:55,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 44 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 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 14:01:55,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:55,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 616 [2022-12-13 14:01:55,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:55,458 INFO L130 PetriNetUnfolder]: 919/1708 cut-off events. [2022-12-13 14:01:55,458 INFO L131 PetriNetUnfolder]: For 1970/1970 co-relation queries the response was YES. [2022-12-13 14:01:55,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5699 conditions, 1708 events. 919/1708 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9285 event pairs, 12 based on Foata normal form. 50/1758 useless extension candidates. Maximal degree in co-relation 5672. Up to 1552 conditions per place. [2022-12-13 14:01:55,464 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 62 selfloop transitions, 6 changer transitions 1/69 dead transitions. [2022-12-13 14:01:55,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 557 flow [2022-12-13 14:01:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:01:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:01:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1052 transitions. [2022-12-13 14:01:55,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42694805194805197 [2022-12-13 14:01:55,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1052 transitions. [2022-12-13 14:01:55,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1052 transitions. [2022-12-13 14:01:55,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:55,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1052 transitions. [2022-12-13 14:01:55,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 14:01:55,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:55,471 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:55,471 INFO L175 Difference]: Start difference. First operand has 72 places, 44 transitions, 279 flow. Second operand 4 states and 1052 transitions. [2022-12-13 14:01:55,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 557 flow [2022-12-13 14:01:55,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 69 transitions, 550 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:01:55,475 INFO L231 Difference]: Finished difference. Result has 76 places, 45 transitions, 303 flow [2022-12-13 14:01:55,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=76, PETRI_TRANSITIONS=45} [2022-12-13 14:01:55,476 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2022-12-13 14:01:55,476 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 45 transitions, 303 flow [2022-12-13 14:01:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 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 14:01:55,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:55,477 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:55,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (30)] Forceful destruction successful, exit code 0 [2022-12-13 14:01:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:55,678 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1878353252, now seen corresponding path program 1 times [2022-12-13 14:01:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92163333] [2022-12-13 14:01:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:01:55,682 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 14:01:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:55,685 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:55,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (31)] Waiting until timeout for monitored process [2022-12-13 14:01:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:01:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:01:55,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 14:01:55,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:55,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92163333] [2022-12-13 14:01:55,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92163333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:55,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:55,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:01:55,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053531658] [2022-12-13 14:01:55,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:55,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:55,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:55,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 616 [2022-12-13 14:01:55,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 45 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 258.5) internal successors, (1034), 4 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 14:01:55,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:55,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 616 [2022-12-13 14:01:55,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:56,425 INFO L130 PetriNetUnfolder]: 969/1792 cut-off events. [2022-12-13 14:01:56,425 INFO L131 PetriNetUnfolder]: For 3492/3492 co-relation queries the response was YES. [2022-12-13 14:01:56,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 1792 events. 969/1792 cut-off events. For 3492/3492 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9526 event pairs, 117 based on Foata normal form. 22/1814 useless extension candidates. Maximal degree in co-relation 6036. Up to 1532 conditions per place. [2022-12-13 14:01:56,430 INFO L137 encePairwiseOnDemand]: 610/616 looper letters, 62 selfloop transitions, 7 changer transitions 1/70 dead transitions. [2022-12-13 14:01:56,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 593 flow [2022-12-13 14:01:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:01:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:01:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1051 transitions. [2022-12-13 14:01:56,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4265422077922078 [2022-12-13 14:01:56,432 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1051 transitions. [2022-12-13 14:01:56,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1051 transitions. [2022-12-13 14:01:56,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:56,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1051 transitions. [2022-12-13 14:01:56,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.75) internal successors, (1051), 4 states have internal predecessors, (1051), 0 states have call successors, (0), 0 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 14:01:56,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:56,435 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:56,435 INFO L175 Difference]: Start difference. First operand has 76 places, 45 transitions, 303 flow. Second operand 4 states and 1051 transitions. [2022-12-13 14:01:56,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 593 flow [2022-12-13 14:01:56,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 577 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 14:01:56,438 INFO L231 Difference]: Finished difference. Result has 76 places, 47 transitions, 340 flow [2022-12-13 14:01:56,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=340, PETRI_PLACES=76, PETRI_TRANSITIONS=47} [2022-12-13 14:01:56,438 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2022-12-13 14:01:56,438 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 47 transitions, 340 flow [2022-12-13 14:01:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.5) internal successors, (1034), 4 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 14:01:56,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:56,439 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:56,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (31)] Ended with exit code 0 [2022-12-13 14:01:56,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:56,639 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash 845316200, now seen corresponding path program 2 times [2022-12-13 14:01:56,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:56,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937804298] [2022-12-13 14:01:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:01:56,640 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 14:01:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:56,641 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:56,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (32)] Waiting until timeout for monitored process [2022-12-13 14:01:56,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:01:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:56,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:01:56,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:56,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:01:56,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:56,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937804298] [2022-12-13 14:01:56,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937804298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:01:56,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:01:56,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:01:56,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948908907] [2022-12-13 14:01:56,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:01:56,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:01:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:01:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:01:56,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 616 [2022-12-13 14:01:56,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 47 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 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 14:01:56,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:56,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 616 [2022-12-13 14:01:56,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:01:57,387 INFO L130 PetriNetUnfolder]: 918/1687 cut-off events. [2022-12-13 14:01:57,387 INFO L131 PetriNetUnfolder]: For 3452/3452 co-relation queries the response was YES. [2022-12-13 14:01:57,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5836 conditions, 1687 events. 918/1687 cut-off events. For 3452/3452 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8680 event pairs, 611 based on Foata normal form. 22/1709 useless extension candidates. Maximal degree in co-relation 5805. Up to 1471 conditions per place. [2022-12-13 14:01:57,392 INFO L137 encePairwiseOnDemand]: 611/616 looper letters, 62 selfloop transitions, 7 changer transitions 3/72 dead transitions. [2022-12-13 14:01:57,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 593 flow [2022-12-13 14:01:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:01:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:01:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1052 transitions. [2022-12-13 14:01:57,394 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42694805194805197 [2022-12-13 14:01:57,394 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1052 transitions. [2022-12-13 14:01:57,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1052 transitions. [2022-12-13 14:01:57,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:01:57,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1052 transitions. [2022-12-13 14:01:57,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 14:01:57,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:57,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 616.0) internal successors, (3080), 5 states have internal predecessors, (3080), 0 states have call successors, (0), 0 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 14:01:57,397 INFO L175 Difference]: Start difference. First operand has 76 places, 47 transitions, 340 flow. Second operand 4 states and 1052 transitions. [2022-12-13 14:01:57,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 593 flow [2022-12-13 14:01:57,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 583 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 14:01:57,402 INFO L231 Difference]: Finished difference. Result has 79 places, 48 transitions, 364 flow [2022-12-13 14:01:57,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=79, PETRI_TRANSITIONS=48} [2022-12-13 14:01:57,402 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2022-12-13 14:01:57,402 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 48 transitions, 364 flow [2022-12-13 14:01:57,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 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 14:01:57,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:01:57,402 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 14:01:57,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (32)] Ended with exit code 0 [2022-12-13 14:01:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:57,603 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:01:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:01:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1752189413, now seen corresponding path program 3 times [2022-12-13 14:01:57,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:01:57,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535706140] [2022-12-13 14:01:57,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:01:57,606 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 14:01:57,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:01:57,609 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:01:57,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (33)] Waiting until timeout for monitored process [2022-12-13 14:01:58,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 14:01:58,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:01:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:01:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:01:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:58,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:01:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:01:58,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 14:01:58,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535706140] [2022-12-13 14:01:58,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535706140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:01:58,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:01:58,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 14:01:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904598821] [2022-12-13 14:01:58,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:01:58,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:01:58,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 14:01:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:01:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:01:59,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 616 [2022-12-13 14:01:59,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 48 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 259.14285714285717) internal successors, (3628), 14 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:01:59,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:01:59,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 616 [2022-12-13 14:01:59,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:02:00,045 INFO L130 PetriNetUnfolder]: 809/1516 cut-off events. [2022-12-13 14:02:00,046 INFO L131 PetriNetUnfolder]: For 3616/3616 co-relation queries the response was YES. [2022-12-13 14:02:00,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5337 conditions, 1516 events. 809/1516 cut-off events. For 3616/3616 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7746 event pairs, 11 based on Foata normal form. 56/1572 useless extension candidates. Maximal degree in co-relation 5305. Up to 327 conditions per place. [2022-12-13 14:02:00,050 INFO L137 encePairwiseOnDemand]: 612/616 looper letters, 122 selfloop transitions, 9 changer transitions 0/131 dead transitions. [2022-12-13 14:02:00,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 962 flow [2022-12-13 14:02:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:02:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:02:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2142 transitions. [2022-12-13 14:02:00,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2022-12-13 14:02:00,052 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2142 transitions. [2022-12-13 14:02:00,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2142 transitions. [2022-12-13 14:02:00,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:02:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2142 transitions. [2022-12-13 14:02:00,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 267.75) internal successors, (2142), 8 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 14:02:00,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:02:00,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 616.0) internal successors, (5544), 9 states have internal predecessors, (5544), 0 states have call successors, (0), 0 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 14:02:00,056 INFO L175 Difference]: Start difference. First operand has 79 places, 48 transitions, 364 flow. Second operand 8 states and 2142 transitions. [2022-12-13 14:02:00,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 962 flow [2022-12-13 14:02:00,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 131 transitions, 915 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-12-13 14:02:00,061 INFO L231 Difference]: Finished difference. Result has 74 places, 45 transitions, 315 flow [2022-12-13 14:02:00,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=616, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=74, PETRI_TRANSITIONS=45} [2022-12-13 14:02:00,061 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2022-12-13 14:02:00,061 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 45 transitions, 315 flow [2022-12-13 14:02:00,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 259.14285714285717) internal successors, (3628), 14 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:02:00,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:02:00,062 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:02:00,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (33)] Forceful destruction successful, exit code 0 [2022-12-13 14:02:00,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:02:00,263 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-13 14:02:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:02:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash -227530183, now seen corresponding path program 1 times [2022-12-13 14:02:00,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 14:02:00,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751249595] [2022-12-13 14:02:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:02:00,266 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 14:02:00,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 14:02:00,268 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 14:02:00,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2964fe11-a3c6-4b51-9840-28e26c62a067/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 (34)] Waiting until timeout for monitored process [2022-12-13 14:02:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:02:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 14:02:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:02:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:02:01,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:02:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:02:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:02:01,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:02:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:02:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:02:01,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:02:01,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:02:01,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:02:02,056 INFO L321 Elim1Store]: treesize reduction 288, result has 31.6 percent of original size [2022-12-13 14:02:02,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 6 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 702 treesize of output 338 [2022-12-13 14:02:20,924 WARN L233 SmtUtils]: Spent 17.33s on a formula simplification. DAG size of input: 81 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:02:29,638 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:02:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:02:30,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:03:05,807 WARN L233 SmtUtils]: Spent 9.58s on a formula simplification. DAG size of input: 197 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:03:20,848 WARN L233 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 362 DAG size of output: 234 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 14:03:20,850 INFO L321 Elim1Store]: treesize reduction 420, result has 66.7 percent of original size [2022-12-13 14:03:20,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 408 treesize of output 941