./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-4e7fbc6 [2022-11-23 02:54:56,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:54:56,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:54:56,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:54:56,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:54:56,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:54:56,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:54:56,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:54:56,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:54:56,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:54:56,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:54:56,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:54:56,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:54:56,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:54:56,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:54:56,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:54:56,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:54:56,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:54:56,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:54:56,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:54:56,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:54:56,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:54:56,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:54:56,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:54:56,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:54:56,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:54:56,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:54:56,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:54:56,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:54:56,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:54:56,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:54:56,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:54:56,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:54:56,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:54:56,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:54:56,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:54:56,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:54:56,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:54:56,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:54:56,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:54:56,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:54:56,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 02:54:56,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:54:56,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:54:56,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:54:56,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:54:56,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:54:56,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:54:56,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:54:56,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:54:56,729 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:54:56,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:54:56,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:54:56,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:54:56,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:54:56,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:54:56,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:54:56,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:54:56,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:54:56,736 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:54:56,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:54:56,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:54:56,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:54:56,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:54:56,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:54:56,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:54:56,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:54:56,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:54:56,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:54:56,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:54:56,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:54:56,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:54:56,741 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:54:56,741 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:54:56,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:54:56,742 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-23 02:54:57,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:54:57,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:54:57,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:54:57,036 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:54:57,037 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:54:57,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-23 02:55:00,096 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:55:00,328 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:55:00,329 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-23 02:55:00,340 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data/3c2babc2e/35b0d04be0084973ba2512c4b8b85ec2/FLAGad4d31125 [2022-11-23 02:55:00,354 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data/3c2babc2e/35b0d04be0084973ba2512c4b8b85ec2 [2022-11-23 02:55:00,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:55:00,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:55:00,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:55:00,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:55:00,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:55:00,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:00" (1/1) ... [2022-11-23 02:55:00,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241ec4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:00, skipping insertion in model container [2022-11-23 02:55:00,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:00" (1/1) ... [2022-11-23 02:55:00,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:55:00,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:55:00,578 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-23 02:55:00,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:55:00,598 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 02:55:00,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4cfe049f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:00, skipping insertion in model container [2022-11-23 02:55:00,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:55:00,599 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 02:55:00,601 INFO L158 Benchmark]: Toolchain (without parser) took 241.88ms. Allocated memory is still 148.9MB. Free memory was 113.2MB in the beginning and 103.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 02:55:00,601 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 148.9MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 02:55:00,602 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.49ms. Allocated memory is still 148.9MB. Free memory was 112.8MB in the beginning and 103.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 02:55:00,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 148.9MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.49ms. Allocated memory is still 148.9MB. Free memory was 112.8MB in the beginning and 103.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-4e7fbc6 [2022-11-23 02:55:02,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:55:02,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:55:02,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:55:02,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:55:02,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:55:02,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:55:02,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:55:02,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:55:02,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:55:02,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:55:02,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:55:02,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:55:02,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:55:02,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:55:02,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:55:02,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:55:02,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:55:02,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:55:02,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:55:02,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:55:02,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:55:02,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:55:02,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:55:02,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:55:02,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:55:02,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:55:02,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:55:02,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:55:02,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:55:02,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:55:02,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:55:02,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:55:02,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:55:02,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:55:02,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:55:02,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:55:02,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:55:02,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:55:02,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:55:02,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:55:02,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 02:55:02,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:55:02,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:55:02,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:55:02,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:55:02,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:55:02,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:55:02,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:55:02,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:55:02,947 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:55:02,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:55:02,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:55:02,948 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:55:02,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:55:02,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:55:02,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:55:02,949 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:55:02,949 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:55:02,950 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:55:02,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:55:02,950 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:55:02,950 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 02:55:02,951 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 02:55:02,951 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:55:02,951 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:55:02,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:55:02,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:55:02,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:55:02,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:55:02,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:55:02,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:55:02,953 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 02:55:02,953 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 02:55:02,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:55:02,954 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:55:02,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:55:02,954 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 02:55:02,954 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-23 02:55:03,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:55:03,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:55:03,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:55:03,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:55:03,386 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:55:03,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-23 02:55:06,382 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:55:06,627 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:55:06,627 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-23 02:55:06,641 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data/5f2fa4269/7dc9a05b3de64772a15f3ff6b9d2910b/FLAGc95224e1c [2022-11-23 02:55:06,654 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/data/5f2fa4269/7dc9a05b3de64772a15f3ff6b9d2910b [2022-11-23 02:55:06,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:55:06,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:55:06,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:55:06,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:55:06,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:55:06,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:06" (1/1) ... [2022-11-23 02:55:06,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72aa9047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:06, skipping insertion in model container [2022-11-23 02:55:06,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:06" (1/1) ... [2022-11-23 02:55:06,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:55:06,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:55:06,857 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-23 02:55:06,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:55:06,896 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 02:55:06,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:55:06,930 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-23 02:55:06,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:55:06,958 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:55:06,995 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_01952bfb-38b4-4c7b-a85d-84c299f29eb6/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-23 02:55:07,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:55:07,020 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:55:07,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07 WrapperNode [2022-11-23 02:55:07,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:55:07,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:55:07,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:55:07,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:55:07,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,067 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-11-23 02:55:07,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:55:07,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:55:07,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:55:07,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:55:07,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:55:07,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:55:07,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:55:07,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:55:07,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (1/1) ... [2022-11-23 02:55:07,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:55:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:07,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:55:07,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:55:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:55:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 02:55:07,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:55:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 02:55:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:55:07,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:55:07,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:55:07,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:55:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:55:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:55:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:55:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:55:07,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:55:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:55:07,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 02:55:07,250 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:55:07,412 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:55:07,414 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:55:08,000 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:55:08,176 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:55:08,179 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 02:55:08,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:08 BoogieIcfgContainer [2022-11-23 02:55:08,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:55:08,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:55:08,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:55:08,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:55:08,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:55:06" (1/3) ... [2022-11-23 02:55:08,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf7292d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:08, skipping insertion in model container [2022-11-23 02:55:08,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:07" (2/3) ... [2022-11-23 02:55:08,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf7292d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:08, skipping insertion in model container [2022-11-23 02:55:08,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:08" (3/3) ... [2022-11-23 02:55:08,193 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-11-23 02:55:08,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:55:08,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-23 02:55:08,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:55:08,349 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:55:08,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-11-23 02:55:08,527 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-11-23 02:55:08,527 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:55:08,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-23 02:55:08,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 212 transitions, 440 flow [2022-11-23 02:55:08,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 205 transitions, 422 flow [2022-11-23 02:55:08,551 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:55:08,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 205 transitions, 422 flow [2022-11-23 02:55:08,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 205 transitions, 422 flow [2022-11-23 02:55:08,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 205 transitions, 422 flow [2022-11-23 02:55:08,648 INFO L130 PetriNetUnfolder]: 15/205 cut-off events. [2022-11-23 02:55:08,649 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:55:08,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 15/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 212 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-23 02:55:08,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-11-23 02:55:39,400 INFO L134 LiptonReduction]: Checked pairs total: 3006 [2022-11-23 02:55:39,400 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-23 02:55:39,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:55:39,421 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;@2dd049fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:55:39,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-23 02:55:39,424 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 02:55:39,424 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:55:39,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:39,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 02:55:39,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash 28050, now seen corresponding path program 1 times [2022-11-23 02:55:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:39,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431046878] [2022-11-23 02:55:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:39,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:39,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:39,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 02:55:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:55:39,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:39,762 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:55:39,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:55:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:39,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:55:39,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431046878] [2022-11-23 02:55:39,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431046878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:55:39,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:55:39,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:55:39,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372722280] [2022-11-23 02:55:39,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:55:39,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:55:39,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:55:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:55:40,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-23 02:55:40,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:40,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:40,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-23 02:55:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:40,869 INFO L130 PetriNetUnfolder]: 569/872 cut-off events. [2022-11-23 02:55:40,870 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-23 02:55:40,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1771 conditions, 872 events. 569/872 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4036 event pairs, 348 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 1609. Up to 859 conditions per place. [2022-11-23 02:55:40,882 INFO L137 encePairwiseOnDemand]: 432/444 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-11-23 02:55:40,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 214 flow [2022-11-23 02:55:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:55:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:55:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-11-23 02:55:40,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-11-23 02:55:40,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-11-23 02:55:40,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-11-23 02:55:40,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:40,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-11-23 02:55:40,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:40,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:40,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:40,940 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 592 transitions. [2022-11-23 02:55:40,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 214 flow [2022-11-23 02:55:40,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 02:55:40,951 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 130 flow [2022-11-23 02:55:40,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2022-11-23 02:55:40,959 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-23 02:55:40,960 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 130 flow [2022-11-23 02:55:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:40,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:40,966 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 02:55:40,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Ended with exit code 0 [2022-11-23 02:55:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:41,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash 28049, now seen corresponding path program 1 times [2022-11-23 02:55:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249081339] [2022-11-23 02:55:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:41,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:41,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:41,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:41,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 02:55:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:55:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:41,296 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:55:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:55:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:41,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:55:41,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249081339] [2022-11-23 02:55:41,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249081339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:55:41,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:55:41,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:55:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263541038] [2022-11-23 02:55:41,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:55:41,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:55:41,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:55:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:55:41,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-23 02:55:41,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:41,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:41,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-23 02:55:41,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:41,826 INFO L130 PetriNetUnfolder]: 569/866 cut-off events. [2022-11-23 02:55:41,826 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:55:41,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757 conditions, 866 events. 569/866 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4018 event pairs, 348 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 1726. Up to 859 conditions per place. [2022-11-23 02:55:41,832 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 42 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-23 02:55:41,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 210 flow [2022-11-23 02:55:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:55:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:55:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-23 02:55:41,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43318318318318316 [2022-11-23 02:55:41,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-23 02:55:41,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-23 02:55:41,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:41,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-23 02:55:41,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:41,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:41,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:41,842 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 130 flow. Second operand 3 states and 577 transitions. [2022-11-23 02:55:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 210 flow [2022-11-23 02:55:41,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:55:41,844 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 118 flow [2022-11-23 02:55:41,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-23 02:55:41,845 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-11-23 02:55:41,846 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 118 flow [2022-11-23 02:55:41,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:41,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:41,846 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:55:41,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:42,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:42,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 876505, now seen corresponding path program 1 times [2022-11-23 02:55:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:42,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296886213] [2022-11-23 02:55:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:42,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:42,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:42,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:42,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 02:55:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 02:55:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:42,189 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 8 treesize of output 7 [2022-11-23 02:55:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:42,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:55:42,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:42,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296886213] [2022-11-23 02:55:42,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296886213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:55:42,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:55:42,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:55:42,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906413309] [2022-11-23 02:55:42,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:55:42,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:55:42,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:55:42,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:55:42,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-23 02:55:42,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:42,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:42,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-23 02:55:42,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:42,825 INFO L130 PetriNetUnfolder]: 569/864 cut-off events. [2022-11-23 02:55:42,825 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:55:42,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 864 events. 569/864 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 3982 event pairs, 348 based on Foata normal form. 2/277 useless extension candidates. Maximal degree in co-relation 1742. Up to 853 conditions per place. [2022-11-23 02:55:42,831 INFO L137 encePairwiseOnDemand]: 442/444 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-23 02:55:42,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 200 flow [2022-11-23 02:55:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:55:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:55:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-11-23 02:55:42,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43093093093093093 [2022-11-23 02:55:42,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-11-23 02:55:42,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-11-23 02:55:42,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:42,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-11-23 02:55:42,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:42,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:42,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:42,841 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 118 flow. Second operand 3 states and 574 transitions. [2022-11-23 02:55:42,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 200 flow [2022-11-23 02:55:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:55:42,843 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 119 flow [2022-11-23 02:55:42,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2022-11-23 02:55:42,844 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-11-23 02:55:42,844 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 119 flow [2022-11-23 02:55:42,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:42,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:42,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:55:42,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-23 02:55:43,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:43,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash 875745, now seen corresponding path program 1 times [2022-11-23 02:55:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:43,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463319556] [2022-11-23 02:55:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:43,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:43,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:43,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 02:55:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:43,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:55:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:43,218 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:55:43,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:55:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:43,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:43,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463319556] [2022-11-23 02:55:43,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463319556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:43,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:55:43,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-23 02:55:43,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831585669] [2022-11-23 02:55:43,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:43,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:55:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:55:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:55:45,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-23 02:55:45,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:45,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:45,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-23 02:55:45,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:47,067 INFO L130 PetriNetUnfolder]: 1144/1734 cut-off events. [2022-11-23 02:55:47,068 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:55:47,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 1734 events. 1144/1734 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 9165 event pairs, 696 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 3510. Up to 856 conditions per place. [2022-11-23 02:55:47,077 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 71 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2022-11-23 02:55:47,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 441 flow [2022-11-23 02:55:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:55:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:55:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1104 transitions. [2022-11-23 02:55:47,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2022-11-23 02:55:47,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1104 transitions. [2022-11-23 02:55:47,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1104 transitions. [2022-11-23 02:55:47,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:47,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1104 transitions. [2022-11-23 02:55:47,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:47,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:47,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:47,093 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 119 flow. Second operand 6 states and 1104 transitions. [2022-11-23 02:55:47,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 441 flow [2022-11-23 02:55:47,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 91 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:55:47,098 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 277 flow [2022-11-23 02:55:47,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2022-11-23 02:55:47,100 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-23 02:55:47,101 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 277 flow [2022-11-23 02:55:47,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:47,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:47,102 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 02:55:47,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:47,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:47,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:47,313 INFO L85 PathProgramCache]: Analyzing trace with hash 27170950, now seen corresponding path program 1 times [2022-11-23 02:55:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:47,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811644184] [2022-11-23 02:55:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:47,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:47,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:47,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:47,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 02:55:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:55:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:47,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:55:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:55:47,501 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 02:55:47,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 02:55:47,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 02:55:47,595 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 02:55:47,596 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 [2022-11-23 02:55:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:47,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:48,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811644184] [2022-11-23 02:55:48,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811644184] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:48,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:55:48,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-23 02:55:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17866867] [2022-11-23 02:55:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:55:48,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:55:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:55:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:55:49,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-23 02:55:49,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:49,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:49,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-23 02:55:49,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:49,833 INFO L130 PetriNetUnfolder]: 860/1338 cut-off events. [2022-11-23 02:55:49,833 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 02:55:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 1338 events. 860/1338 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 6894 event pairs, 522 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 2760. Up to 1312 conditions per place. [2022-11-23 02:55:49,841 INFO L137 encePairwiseOnDemand]: 439/444 looper letters, 46 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2022-11-23 02:55:49,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 357 flow [2022-11-23 02:55:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:55:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:55:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2022-11-23 02:55:49,845 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3963963963963964 [2022-11-23 02:55:49,845 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2022-11-23 02:55:49,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2022-11-23 02:55:49,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:49,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2022-11-23 02:55:49,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:49,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:49,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:49,854 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 277 flow. Second operand 5 states and 880 transitions. [2022-11-23 02:55:49,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 357 flow [2022-11-23 02:55:49,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 342 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-23 02:55:49,857 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 250 flow [2022-11-23 02:55:49,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2022-11-23 02:55:49,858 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-23 02:55:49,858 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 250 flow [2022-11-23 02:55:49,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:49,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:49,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 02:55:49,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:50,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash 27170951, now seen corresponding path program 1 times [2022-11-23 02:55:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:50,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765098342] [2022-11-23 02:55:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:50,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:50,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:50,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 02:55:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:55:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:50,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:55:50,274 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 02:55:50,275 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 02:55:50,339 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:55:50,339 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 [2022-11-23 02:55:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:50,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:55:50,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:50,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765098342] [2022-11-23 02:55:50,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765098342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:55:50,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:55:50,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:55:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74005896] [2022-11-23 02:55:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:55:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:55:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:50,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:55:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:55:50,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 444 [2022-11-23 02:55:50,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:50,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:50,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 444 [2022-11-23 02:55:50,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:50,917 INFO L130 PetriNetUnfolder]: 576/942 cut-off events. [2022-11-23 02:55:50,917 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-23 02:55:50,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 942 events. 576/942 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 4748 event pairs, 348 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 1955. Up to 928 conditions per place. [2022-11-23 02:55:50,922 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-11-23 02:55:50,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 324 flow [2022-11-23 02:55:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:55:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:55:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-11-23 02:55:50,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2022-11-23 02:55:50,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-11-23 02:55:50,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-11-23 02:55:50,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:50,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-11-23 02:55:50,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:50,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:50,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:50,931 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 250 flow. Second operand 3 states and 580 transitions. [2022-11-23 02:55:50,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 324 flow [2022-11-23 02:55:50,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 315 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-23 02:55:50,936 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 219 flow [2022-11-23 02:55:50,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-11-23 02:55:50,939 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-11-23 02:55:50,939 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 219 flow [2022-11-23 02:55:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:50,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:50,943 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 02:55:50,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:51,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:55:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash 325667154, now seen corresponding path program 2 times [2022-11-23 02:55:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:55:51,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935235114] [2022-11-23 02:55:51,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:55:51,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:55:51,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:55:51,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:55:51,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 02:55:51,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:55:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:55:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:51,344 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:55:51,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:55:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:51,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:52,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:55:52,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935235114] [2022-11-23 02:55:52,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935235114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:52,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:55:52,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:55:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615522635] [2022-11-23 02:55:52,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:52,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:55:52,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:55:52,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:55:52,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:55:57,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-23 02:55:57,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 219 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:55:57,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:57,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-23 02:55:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:59,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:56:01,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:56:03,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:56:05,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:56:08,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:56:09,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:56:13,486 INFO L130 PetriNetUnfolder]: 2002/3265 cut-off events. [2022-11-23 02:56:13,486 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-23 02:56:13,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6704 conditions, 3265 events. 2002/3265 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 19978 event pairs, 1218 based on Foata normal form. 10/1365 useless extension candidates. Maximal degree in co-relation 6690. Up to 457 conditions per place. [2022-11-23 02:56:13,504 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 207 selfloop transitions, 34 changer transitions 0/242 dead transitions. [2022-11-23 02:56:13,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 242 transitions, 1233 flow [2022-11-23 02:56:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:56:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 02:56:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2631 transitions. [2022-11-23 02:56:13,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4232625482625483 [2022-11-23 02:56:13,514 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2631 transitions. [2022-11-23 02:56:13,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2631 transitions. [2022-11-23 02:56:13,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:13,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2631 transitions. [2022-11-23 02:56:13,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 187.92857142857142) internal successors, (2631), 14 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:13,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 444.0) internal successors, (6660), 15 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:13,533 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 444.0) internal successors, (6660), 15 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:13,533 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 219 flow. Second operand 14 states and 2631 transitions. [2022-11-23 02:56:13,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 242 transitions, 1233 flow [2022-11-23 02:56:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 242 transitions, 1232 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:56:13,538 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 500 flow [2022-11-23 02:56:13,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=500, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2022-11-23 02:56:13,539 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2022-11-23 02:56:13,539 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 500 flow [2022-11-23 02:56:13,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:13,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:13,540 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:56:13,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:13,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:56:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash 341498121, now seen corresponding path program 1 times [2022-11-23 02:56:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:56:13,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009187130] [2022-11-23 02:56:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:13,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:13,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:56:13,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:56:13,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 02:56:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:13,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:56:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:13,958 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 02:56:13,958 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 [2022-11-23 02:56:14,001 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:56:14,001 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 [2022-11-23 02:56:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:14,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:56:14,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:56:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009187130] [2022-11-23 02:56:14,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009187130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:14,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:14,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:56:14,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210663381] [2022-11-23 02:56:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:14,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:56:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:56:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:56:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:56:14,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 444 [2022-11-23 02:56:14,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:14,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:14,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 444 [2022-11-23 02:56:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:14,794 INFO L130 PetriNetUnfolder]: 1862/3013 cut-off events. [2022-11-23 02:56:14,833 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-11-23 02:56:14,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6277 conditions, 3013 events. 1862/3013 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18228 event pairs, 1120 based on Foata normal form. 0/1303 useless extension candidates. Maximal degree in co-relation 6255. Up to 2964 conditions per place. [2022-11-23 02:56:14,872 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 68 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2022-11-23 02:56:14,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 634 flow [2022-11-23 02:56:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:56:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:56:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-11-23 02:56:14,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4294294294294294 [2022-11-23 02:56:14,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-11-23 02:56:14,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-11-23 02:56:14,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:14,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-11-23 02:56:14,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:14,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:14,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:14,887 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 500 flow. Second operand 3 states and 572 transitions. [2022-11-23 02:56:14,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 634 flow [2022-11-23 02:56:14,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 553 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-11-23 02:56:14,892 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 417 flow [2022-11-23 02:56:14,892 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=417, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2022-11-23 02:56:14,892 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2022-11-23 02:56:14,893 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 417 flow [2022-11-23 02:56:14,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:14,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:14,893 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:56:14,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:15,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:15,105 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:56:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash 341498119, now seen corresponding path program 1 times [2022-11-23 02:56:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:56:15,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792110058] [2022-11-23 02:56:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:15,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:15,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:56:15,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:56:15,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 02:56:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 02:56:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:56:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:56:15,321 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 02:56:15,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 02:56:15,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-23 02:56:15,403 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 02:56:15,404 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 [2022-11-23 02:56:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:15,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:56:16,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:56:16,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792110058] [2022-11-23 02:56:16,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792110058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:16,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:56:16,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-11-23 02:56:16,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013999997] [2022-11-23 02:56:16,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:16,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:56:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:56:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:56:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:56:17,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 444 [2022-11-23 02:56:17,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 417 flow. Second operand has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:17,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:17,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 444 [2022-11-23 02:56:17,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:20,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 02:56:21,095 INFO L130 PetriNetUnfolder]: 1722/2761 cut-off events. [2022-11-23 02:56:21,096 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-11-23 02:56:21,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5728 conditions, 2761 events. 1722/2761 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16310 event pairs, 1022 based on Foata normal form. 0/1263 useless extension candidates. Maximal degree in co-relation 5705. Up to 2303 conditions per place. [2022-11-23 02:56:21,108 INFO L137 encePairwiseOnDemand]: 436/444 looper letters, 74 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2022-11-23 02:56:21,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 657 flow [2022-11-23 02:56:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:56:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:56:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1560 transitions. [2022-11-23 02:56:21,114 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39039039039039036 [2022-11-23 02:56:21,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1560 transitions. [2022-11-23 02:56:21,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1560 transitions. [2022-11-23 02:56:21,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:21,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1560 transitions. [2022-11-23 02:56:21,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:21,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 444.0) internal successors, (4440), 10 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:21,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 444.0) internal successors, (4440), 10 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:21,128 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 417 flow. Second operand 9 states and 1560 transitions. [2022-11-23 02:56:21,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 657 flow [2022-11-23 02:56:21,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 656 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:56:21,132 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 461 flow [2022-11-23 02:56:21,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=461, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2022-11-23 02:56:21,133 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2022-11-23 02:56:21,133 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 461 flow [2022-11-23 02:56:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:21,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:21,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:56:21,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:21,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:56:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 341498028, now seen corresponding path program 1 times [2022-11-23 02:56:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:56:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251903329] [2022-11-23 02:56:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:21,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:56:21,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:56:21,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 02:56:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:56:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:21,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:56:21,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:56:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251903329] [2022-11-23 02:56:21,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251903329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:21,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:21,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:56:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844101883] [2022-11-23 02:56:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:21,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:56:21,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:56:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:56:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:56:21,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 444 [2022-11-23 02:56:21,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 461 flow. Second operand has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:21,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:21,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 444 [2022-11-23 02:56:21,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:22,935 INFO L130 PetriNetUnfolder]: 3409/5288 cut-off events. [2022-11-23 02:56:22,936 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2022-11-23 02:56:22,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10875 conditions, 5288 events. 3409/5288 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 33558 event pairs, 903 based on Foata normal form. 0/2418 useless extension candidates. Maximal degree in co-relation 10850. Up to 3137 conditions per place. [2022-11-23 02:56:22,973 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 77 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-11-23 02:56:22,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 684 flow [2022-11-23 02:56:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:56:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:56:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 758 transitions. [2022-11-23 02:56:22,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42680180180180183 [2022-11-23 02:56:22,976 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 758 transitions. [2022-11-23 02:56:22,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 758 transitions. [2022-11-23 02:56:22,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:22,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 758 transitions. [2022-11-23 02:56:22,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.5) internal successors, (758), 4 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:22,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:22,982 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:22,982 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 461 flow. Second operand 4 states and 758 transitions. [2022-11-23 02:56:22,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 684 flow [2022-11-23 02:56:22,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 635 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-23 02:56:22,987 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 459 flow [2022-11-23 02:56:22,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2022-11-23 02:56:22,989 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2022-11-23 02:56:22,989 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 459 flow [2022-11-23 02:56:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:22,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:22,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:56:23,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:23,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:23,202 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:56:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:23,203 INFO L85 PathProgramCache]: Analyzing trace with hash 341498134, now seen corresponding path program 1 times [2022-11-23 02:56:23,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:56:23,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011846371] [2022-11-23 02:56:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:56:23,204 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:56:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 02:56:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:56:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:23,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:56:23,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:56:23,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011846371] [2022-11-23 02:56:23,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011846371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:23,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:23,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:56:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441322199] [2022-11-23 02:56:23,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:23,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:56:23,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:56:23,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:56:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:56:23,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-23 02:56:23,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:23,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:23,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-23 02:56:23,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:24,958 INFO L130 PetriNetUnfolder]: 3824/6212 cut-off events. [2022-11-23 02:56:24,958 INFO L131 PetriNetUnfolder]: For 568/568 co-relation queries the response was YES. [2022-11-23 02:56:24,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13640 conditions, 6212 events. 3824/6212 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 42965 event pairs, 2408 based on Foata normal form. 84/3489 useless extension candidates. Maximal degree in co-relation 13614. Up to 5245 conditions per place. [2022-11-23 02:56:24,989 INFO L137 encePairwiseOnDemand]: 433/444 looper letters, 102 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2022-11-23 02:56:24,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 892 flow [2022-11-23 02:56:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:56:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:56:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 770 transitions. [2022-11-23 02:56:24,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43355855855855857 [2022-11-23 02:56:24,992 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 770 transitions. [2022-11-23 02:56:24,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 770 transitions. [2022-11-23 02:56:24,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:24,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 770 transitions. [2022-11-23 02:56:24,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:24,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:24,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:24,998 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 459 flow. Second operand 4 states and 770 transitions. [2022-11-23 02:56:24,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 892 flow [2022-11-23 02:56:25,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 869 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:56:25,004 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 469 flow [2022-11-23 02:56:25,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2022-11-23 02:56:25,005 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 24 predicate places. [2022-11-23 02:56:25,005 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 469 flow [2022-11-23 02:56:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:25,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:25,006 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:56:25,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:25,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:56:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 341498027, now seen corresponding path program 1 times [2022-11-23 02:56:25,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:56:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154431694] [2022-11-23 02:56:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:25,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:56:25,226 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:56:25,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 02:56:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:56:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:25,342 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 [2022-11-23 02:56:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:25,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:56:25,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:56:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154431694] [2022-11-23 02:56:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154431694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:56:25,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:56:25,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:56:25,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492190716] [2022-11-23 02:56:25,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:56:25,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:56:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:56:25,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:56:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:56:25,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-23 02:56:25,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 469 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:25,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:25,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-23 02:56:25,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:26,540 INFO L130 PetriNetUnfolder]: 3138/5099 cut-off events. [2022-11-23 02:56:26,540 INFO L131 PetriNetUnfolder]: For 1040/1061 co-relation queries the response was YES. [2022-11-23 02:56:26,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13160 conditions, 5099 events. 3138/5099 cut-off events. For 1040/1061 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33995 event pairs, 1925 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 13133. Up to 4995 conditions per place. [2022-11-23 02:56:26,567 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 58 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2022-11-23 02:56:26,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 599 flow [2022-11-23 02:56:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:56:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:56:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2022-11-23 02:56:26,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40033783783783783 [2022-11-23 02:56:26,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2022-11-23 02:56:26,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2022-11-23 02:56:26,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:56:26,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2022-11-23 02:56:26,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:26,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:26,575 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:26,576 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 469 flow. Second operand 4 states and 711 transitions. [2022-11-23 02:56:26,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 599 flow [2022-11-23 02:56:26,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 594 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:56:26,581 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 478 flow [2022-11-23 02:56:26,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=478, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2022-11-23 02:56:26,582 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2022-11-23 02:56:26,582 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 478 flow [2022-11-23 02:56:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:26,583 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:56:26,583 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:56:26,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:56:26,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:26,795 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:56:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:56:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1521584357, now seen corresponding path program 1 times [2022-11-23 02:56:26,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:56:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603163026] [2022-11-23 02:56:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:56:26,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:56:26,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:56:26,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:56:26,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 02:56:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:56:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 02:56:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:56:27,112 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:56:27,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:56:27,178 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:56:27,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:56:27,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:56:27,314 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 14 treesize of output 16 [2022-11-23 02:56:27,335 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:56:27,335 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 [2022-11-23 02:56:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:27,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:56:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:56:34,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:56:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603163026] [2022-11-23 02:56:34,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603163026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:56:34,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:56:34,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-23 02:56:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909239105] [2022-11-23 02:56:34,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:56:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:56:34,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:56:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:56:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:56:47,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 444 [2022-11-23 02:56:47,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 478 flow. Second operand has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:56:47,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:56:47,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 444 [2022-11-23 02:56:47,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:56:57,876 WARN L233 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:57:08,061 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:57:23,875 INFO L130 PetriNetUnfolder]: 7083/11322 cut-off events. [2022-11-23 02:57:23,875 INFO L131 PetriNetUnfolder]: For 2544/2544 co-relation queries the response was YES. [2022-11-23 02:57:23,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29138 conditions, 11322 events. 7083/11322 cut-off events. For 2544/2544 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 81391 event pairs, 4200 based on Foata normal form. 0/8844 useless extension candidates. Maximal degree in co-relation 29111. Up to 4341 conditions per place. [2022-11-23 02:57:23,947 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 124 selfloop transitions, 45 changer transitions 0/170 dead transitions. [2022-11-23 02:57:23,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 170 transitions, 1397 flow [2022-11-23 02:57:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:57:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 02:57:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2506 transitions. [2022-11-23 02:57:23,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3762762762762763 [2022-11-23 02:57:23,955 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2506 transitions. [2022-11-23 02:57:23,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2506 transitions. [2022-11-23 02:57:23,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:23,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2506 transitions. [2022-11-23 02:57:23,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.06666666666666) internal successors, (2506), 15 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:23,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:23,970 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:23,971 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 478 flow. Second operand 15 states and 2506 transitions. [2022-11-23 02:57:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 170 transitions, 1397 flow [2022-11-23 02:57:23,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 170 transitions, 1367 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:57:23,984 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 870 flow [2022-11-23 02:57:23,984 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=870, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2022-11-23 02:57:23,984 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2022-11-23 02:57:23,985 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 870 flow [2022-11-23 02:57:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:23,985 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:23,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:24,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:24,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:57:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1521584356, now seen corresponding path program 1 times [2022-11-23 02:57:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:57:24,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92034365] [2022-11-23 02:57:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:57:24,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:57:24,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 02:57:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:57:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:24,487 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:57:24,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:57:24,543 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 02:57:24,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 02:57:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:57:24,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:57:24,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:57:24,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92034365] [2022-11-23 02:57:24,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92034365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:24,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:24,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:57:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109747218] [2022-11-23 02:57:24,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:24,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:57:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:57:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:57:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:57:24,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 444 [2022-11-23 02:57:24,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 870 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:24,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:24,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 444 [2022-11-23 02:57:24,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:26,123 INFO L130 PetriNetUnfolder]: 4836/8011 cut-off events. [2022-11-23 02:57:26,123 INFO L131 PetriNetUnfolder]: For 4294/4294 co-relation queries the response was YES. [2022-11-23 02:57:26,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21354 conditions, 8011 events. 4836/8011 cut-off events. For 4294/4294 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 56611 event pairs, 2856 based on Foata normal form. 343/7871 useless extension candidates. Maximal degree in co-relation 21321. Up to 7914 conditions per place. [2022-11-23 02:57:26,161 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 79 selfloop transitions, 12 changer transitions 0/92 dead transitions. [2022-11-23 02:57:26,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 1044 flow [2022-11-23 02:57:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:57:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:57:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2022-11-23 02:57:26,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4127252252252252 [2022-11-23 02:57:26,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2022-11-23 02:57:26,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2022-11-23 02:57:26,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:26,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2022-11-23 02:57:26,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:26,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:26,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:26,169 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 870 flow. Second operand 4 states and 733 transitions. [2022-11-23 02:57:26,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 1044 flow [2022-11-23 02:57:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 1026 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 02:57:26,200 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 868 flow [2022-11-23 02:57:26,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=868, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2022-11-23 02:57:26,200 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2022-11-23 02:57:26,201 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 868 flow [2022-11-23 02:57:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:26,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:26,201 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:26,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:26,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:26,414 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:57:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1762112242, now seen corresponding path program 1 times [2022-11-23 02:57:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:57:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841091043] [2022-11-23 02:57:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:26,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:57:26,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:57:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-23 02:57:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 02:57:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:26,544 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 8 treesize of output 7 [2022-11-23 02:57:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:57:26,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:57:27,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:57:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841091043] [2022-11-23 02:57:27,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841091043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:27,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:57:27,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:57:27,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554495418] [2022-11-23 02:57:27,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:57:27,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:57:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:57:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:57:31,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-23 02:57:31,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 868 flow. Second operand has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:31,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:31,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-23 02:57:31,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:34,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:57:37,166 INFO L130 PetriNetUnfolder]: 9974/15942 cut-off events. [2022-11-23 02:57:37,166 INFO L131 PetriNetUnfolder]: For 8004/8088 co-relation queries the response was YES. [2022-11-23 02:57:37,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42539 conditions, 15942 events. 9974/15942 cut-off events. For 8004/8088 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 118731 event pairs, 833 based on Foata normal form. 672/15669 useless extension candidates. Maximal degree in co-relation 42505. Up to 4789 conditions per place. [2022-11-23 02:57:37,265 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 95 selfloop transitions, 51 changer transitions 0/147 dead transitions. [2022-11-23 02:57:37,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 147 transitions, 1356 flow [2022-11-23 02:57:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:57:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:57:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1432 transitions. [2022-11-23 02:57:37,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40315315315315314 [2022-11-23 02:57:37,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1432 transitions. [2022-11-23 02:57:37,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1432 transitions. [2022-11-23 02:57:37,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:37,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1432 transitions. [2022-11-23 02:57:37,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:37,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:37,282 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:37,282 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 868 flow. Second operand 8 states and 1432 transitions. [2022-11-23 02:57:37,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 147 transitions, 1356 flow [2022-11-23 02:57:37,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 147 transitions, 1343 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:57:37,324 INFO L231 Difference]: Finished difference. Result has 99 places, 99 transitions, 1050 flow [2022-11-23 02:57:37,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1050, PETRI_PLACES=99, PETRI_TRANSITIONS=99} [2022-11-23 02:57:37,324 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2022-11-23 02:57:37,324 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 99 transitions, 1050 flow [2022-11-23 02:57:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:37,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:37,325 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:37,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:37,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:37,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:57:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash 432256953, now seen corresponding path program 1 times [2022-11-23 02:57:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:57:37,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320364966] [2022-11-23 02:57:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:37,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:37,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:57:37,540 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:57:37,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 02:57:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:57:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:57:37,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:37,897 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 11 treesize of output 9 [2022-11-23 02:57:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:57:38,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:57:38,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320364966] [2022-11-23 02:57:38,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320364966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:38,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:57:38,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:57:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849924287] [2022-11-23 02:57:38,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:38,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:57:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:57:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:57:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:57:40,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 444 [2022-11-23 02:57:40,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 1050 flow. Second operand has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:40,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:40,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 444 [2022-11-23 02:57:40,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:43,996 INFO L130 PetriNetUnfolder]: 9386/15256 cut-off events. [2022-11-23 02:57:43,996 INFO L131 PetriNetUnfolder]: For 15207/15291 co-relation queries the response was YES. [2022-11-23 02:57:44,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47330 conditions, 15256 events. 9386/15256 cut-off events. For 15207/15291 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 114903 event pairs, 742 based on Foata normal form. 546/15529 useless extension candidates. Maximal degree in co-relation 47291. Up to 4131 conditions per place. [2022-11-23 02:57:44,085 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 120 selfloop transitions, 45 changer transitions 0/166 dead transitions. [2022-11-23 02:57:44,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1623 flow [2022-11-23 02:57:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:57:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 02:57:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1816 transitions. [2022-11-23 02:57:44,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.409009009009009 [2022-11-23 02:57:44,090 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1816 transitions. [2022-11-23 02:57:44,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1816 transitions. [2022-11-23 02:57:44,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:44,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1816 transitions. [2022-11-23 02:57:44,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.6) internal successors, (1816), 10 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:44,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 444.0) internal successors, (4884), 11 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:44,100 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 444.0) internal successors, (4884), 11 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:44,100 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 1050 flow. Second operand 10 states and 1816 transitions. [2022-11-23 02:57:44,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1623 flow [2022-11-23 02:57:44,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 166 transitions, 1530 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-23 02:57:44,193 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 1087 flow [2022-11-23 02:57:44,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1087, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2022-11-23 02:57:44,194 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2022-11-23 02:57:44,194 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 1087 flow [2022-11-23 02:57:44,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:44,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:44,195 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:44,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:44,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:44,405 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:57:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1282397398, now seen corresponding path program 2 times [2022-11-23 02:57:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:57:44,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216450354] [2022-11-23 02:57:44,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:57:44,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:57:44,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:57:44,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 02:57:44,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:57:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:57:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 02:57:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:44,637 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:57:44,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:57:44,730 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:57:44,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:57:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:57:44,887 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 14 treesize of output 16 [2022-11-23 02:57:44,905 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:57:44,906 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 [2022-11-23 02:57:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 02:57:44,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:57:44,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:57:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216450354] [2022-11-23 02:57:44,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216450354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:44,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:44,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:57:44,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959872522] [2022-11-23 02:57:44,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:44,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:57:44,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:57:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:57:44,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:57:45,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 444 [2022-11-23 02:57:45,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 1087 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:45,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:45,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 444 [2022-11-23 02:57:45,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:47,792 INFO L130 PetriNetUnfolder]: 7811/13044 cut-off events. [2022-11-23 02:57:47,793 INFO L131 PetriNetUnfolder]: For 15169/15169 co-relation queries the response was YES. [2022-11-23 02:57:47,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39445 conditions, 13044 events. 7811/13044 cut-off events. For 15169/15169 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 98213 event pairs, 4788 based on Foata normal form. 959/13905 useless extension candidates. Maximal degree in co-relation 39405. Up to 12947 conditions per place. [2022-11-23 02:57:47,863 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 85 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2022-11-23 02:57:47,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 98 transitions, 1211 flow [2022-11-23 02:57:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:57:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:57:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 714 transitions. [2022-11-23 02:57:47,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40202702702702703 [2022-11-23 02:57:47,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 714 transitions. [2022-11-23 02:57:47,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 714 transitions. [2022-11-23 02:57:47,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:47,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 714 transitions. [2022-11-23 02:57:47,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:47,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:47,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:47,870 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 1087 flow. Second operand 4 states and 714 transitions. [2022-11-23 02:57:47,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 98 transitions, 1211 flow [2022-11-23 02:57:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 98 transitions, 1114 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-23 02:57:47,915 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 944 flow [2022-11-23 02:57:47,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=944, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2022-11-23 02:57:47,915 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2022-11-23 02:57:47,916 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 944 flow [2022-11-23 02:57:47,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:47,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:47,916 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-11-23 02:57:47,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:48,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:48,128 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:57:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:48,129 INFO L85 PathProgramCache]: Analyzing trace with hash -5630497, now seen corresponding path program 1 times [2022-11-23 02:57:48,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:57:48,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415608228] [2022-11-23 02:57:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:48,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:57:48,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:57:48,131 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:57:48,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-23 02:57:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 02:57:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:48,273 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 8 treesize of output 7 [2022-11-23 02:57:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:48,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:51,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:57:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415608228] [2022-11-23 02:57:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415608228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:51,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:57:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-23 02:57:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103313415] [2022-11-23 02:57:51,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:51,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:57:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:57:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:57:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:58:05,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-23 02:58:05,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 944 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:05,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:05,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-23 02:58:05,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:10,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:12,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:14,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:16,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:18,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:20,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:22,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:35,243 INFO L130 PetriNetUnfolder]: 15602/26032 cut-off events. [2022-11-23 02:58:35,243 INFO L131 PetriNetUnfolder]: For 13512/13512 co-relation queries the response was YES. [2022-11-23 02:58:35,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74192 conditions, 26032 events. 15602/26032 cut-off events. For 13512/13512 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 208472 event pairs, 9576 based on Foata normal form. 32/25630 useless extension candidates. Maximal degree in co-relation 74154. Up to 5545 conditions per place. [2022-11-23 02:58:35,421 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 442 selfloop transitions, 47 changer transitions 0/490 dead transitions. [2022-11-23 02:58:35,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 490 transitions, 4003 flow [2022-11-23 02:58:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:58:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 02:58:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3364 transitions. [2022-11-23 02:58:35,425 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4209209209209209 [2022-11-23 02:58:35,425 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3364 transitions. [2022-11-23 02:58:35,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3364 transitions. [2022-11-23 02:58:35,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:35,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3364 transitions. [2022-11-23 02:58:35,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.88888888888889) internal successors, (3364), 18 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:35,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 444.0) internal successors, (8436), 19 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:35,439 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 444.0) internal successors, (8436), 19 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:35,440 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 944 flow. Second operand 18 states and 3364 transitions. [2022-11-23 02:58:35,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 490 transitions, 4003 flow [2022-11-23 02:58:35,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 490 transitions, 3980 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-23 02:58:35,591 INFO L231 Difference]: Finished difference. Result has 121 places, 111 transitions, 1253 flow [2022-11-23 02:58:35,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1253, PETRI_PLACES=121, PETRI_TRANSITIONS=111} [2022-11-23 02:58:35,591 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 72 predicate places. [2022-11-23 02:58:35,591 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 111 transitions, 1253 flow [2022-11-23 02:58:35,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:35,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:35,592 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-23 02:58:35,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:35,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:58:35,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:58:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1694781170, now seen corresponding path program 3 times [2022-11-23 02:58:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:58:35,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964713554] [2022-11-23 02:58:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:58:35,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:58:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:58:35,808 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:58:35,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-23 02:58:35,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 02:58:35,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:58:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:36,095 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:58:36,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:58:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:40,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:58:40,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964713554] [2022-11-23 02:58:40,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964713554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:40,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:40,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-23 02:58:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108389627] [2022-11-23 02:58:40,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 02:58:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:58:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 02:58:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-23 02:59:07,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-23 02:59:07,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 111 transitions, 1253 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:07,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:59:07,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-23 02:59:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:21,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:23,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:25,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:27,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:29,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:31,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:33,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:34,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:36,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:38,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:59:53,428 INFO L130 PetriNetUnfolder]: 15614/26056 cut-off events. [2022-11-23 02:59:53,428 INFO L131 PetriNetUnfolder]: For 13448/13454 co-relation queries the response was YES. [2022-11-23 02:59:53,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74566 conditions, 26056 events. 15614/26056 cut-off events. For 13448/13454 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 210365 event pairs, 9576 based on Foata normal form. 12/25628 useless extension candidates. Maximal degree in co-relation 74519. Up to 5545 conditions per place. [2022-11-23 02:59:53,642 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 380 selfloop transitions, 74 changer transitions 0/455 dead transitions. [2022-11-23 02:59:53,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 455 transitions, 4082 flow [2022-11-23 02:59:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:59:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 02:59:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4372 transitions. [2022-11-23 02:59:53,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4102852852852853 [2022-11-23 02:59:53,648 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4372 transitions. [2022-11-23 02:59:53,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4372 transitions. [2022-11-23 02:59:53,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:53,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4372 transitions. [2022-11-23 02:59:53,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 182.16666666666666) internal successors, (4372), 24 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:53,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 444.0) internal successors, (11100), 25 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:53,661 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 444.0) internal successors, (11100), 25 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:53,661 INFO L175 Difference]: Start difference. First operand has 121 places, 111 transitions, 1253 flow. Second operand 24 states and 4372 transitions. [2022-11-23 02:59:53,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 455 transitions, 4082 flow [2022-11-23 02:59:53,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 455 transitions, 4006 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-11-23 02:59:53,779 INFO L231 Difference]: Finished difference. Result has 149 places, 141 transitions, 1793 flow [2022-11-23 02:59:53,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1793, PETRI_PLACES=149, PETRI_TRANSITIONS=141} [2022-11-23 02:59:53,780 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 100 predicate places. [2022-11-23 02:59:53,780 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 141 transitions, 1793 flow [2022-11-23 02:59:53,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:53,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:59:53,781 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 02:59:53,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:59:53,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:59:53,982 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 02:59:53,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:59:53,983 INFO L85 PathProgramCache]: Analyzing trace with hash 294054084, now seen corresponding path program 2 times [2022-11-23 02:59:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:59:53,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382426946] [2022-11-23 02:59:53,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:59:53,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:59:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:59:53,984 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 02:59:53,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 02:59:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:59:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:59:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:59:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:59:54,158 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 8 treesize of output 7 [2022-11-23 02:59:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:54,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:59:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:56,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:59:56,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382426946] [2022-11-23 02:59:56,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382426946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:59:56,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:59:56,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-11-23 02:59:56,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366715377] [2022-11-23 02:59:56,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:59:56,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:59:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:59:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:59:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:00:11,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 444 [2022-11-23 03:00:11,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 141 transitions, 1793 flow. Second operand has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:11,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:11,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 444 [2022-11-23 03:00:11,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:18,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:00:20,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:00:27,392 INFO L130 PetriNetUnfolder]: 15444/25674 cut-off events. [2022-11-23 03:00:27,393 INFO L131 PetriNetUnfolder]: For 11274/11283 co-relation queries the response was YES. [2022-11-23 03:00:27,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73659 conditions, 25674 events. 15444/25674 cut-off events. For 11274/11283 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 207142 event pairs, 1190 based on Foata normal form. 90/25308 useless extension candidates. Maximal degree in co-relation 73598. Up to 9026 conditions per place. [2022-11-23 03:00:27,627 INFO L137 encePairwiseOnDemand]: 433/444 looper letters, 163 selfloop transitions, 104 changer transitions 0/268 dead transitions. [2022-11-23 03:00:27,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 268 transitions, 2735 flow [2022-11-23 03:00:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 03:00:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-23 03:00:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3394 transitions. [2022-11-23 03:00:27,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3822072072072072 [2022-11-23 03:00:27,631 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3394 transitions. [2022-11-23 03:00:27,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3394 transitions. [2022-11-23 03:00:27,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:27,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3394 transitions. [2022-11-23 03:00:27,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 169.7) internal successors, (3394), 20 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:27,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 444.0) internal successors, (9324), 21 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:27,639 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 444.0) internal successors, (9324), 21 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:27,639 INFO L175 Difference]: Start difference. First operand has 149 places, 141 transitions, 1793 flow. Second operand 20 states and 3394 transitions. [2022-11-23 03:00:27,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 268 transitions, 2735 flow [2022-11-23 03:00:27,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 268 transitions, 2592 flow, removed 35 selfloop flow, removed 9 redundant places. [2022-11-23 03:00:27,770 INFO L231 Difference]: Finished difference. Result has 161 places, 155 transitions, 1969 flow [2022-11-23 03:00:27,770 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1969, PETRI_PLACES=161, PETRI_TRANSITIONS=155} [2022-11-23 03:00:27,770 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2022-11-23 03:00:27,770 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 155 transitions, 1969 flow [2022-11-23 03:00:27,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:27,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:27,771 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:27,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:27,980 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 03:00:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash -19606120, now seen corresponding path program 1 times [2022-11-23 03:00:27,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:00:27,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331965401] [2022-11-23 03:00:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:27,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:27,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:00:27,982 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:00:27,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 03:00:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:00:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:00:28,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:00:28,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:00:28,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331965401] [2022-11-23 03:00:28,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331965401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:00:28,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:00:28,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:00:28,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103630952] [2022-11-23 03:00:28,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:00:28,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:00:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:00:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:00:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:00:28,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 444 [2022-11-23 03:00:28,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 155 transitions, 1969 flow. Second operand has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:28,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:28,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 444 [2022-11-23 03:00:28,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:34,345 INFO L130 PetriNetUnfolder]: 17702/30922 cut-off events. [2022-11-23 03:00:34,345 INFO L131 PetriNetUnfolder]: For 27301/27301 co-relation queries the response was YES. [2022-11-23 03:00:34,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98988 conditions, 30922 events. 17702/30922 cut-off events. For 27301/27301 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 254599 event pairs, 4952 based on Foata normal form. 2524/33446 useless extension candidates. Maximal degree in co-relation 98924. Up to 14249 conditions per place. [2022-11-23 03:00:34,649 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 140 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2022-11-23 03:00:34,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 198 transitions, 2658 flow [2022-11-23 03:00:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:00:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:00:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 946 transitions. [2022-11-23 03:00:34,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4261261261261261 [2022-11-23 03:00:34,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 946 transitions. [2022-11-23 03:00:34,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 946 transitions. [2022-11-23 03:00:34,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:34,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 946 transitions. [2022-11-23 03:00:34,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:34,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:34,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:34,654 INFO L175 Difference]: Start difference. First operand has 161 places, 155 transitions, 1969 flow. Second operand 5 states and 946 transitions. [2022-11-23 03:00:34,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 198 transitions, 2658 flow [2022-11-23 03:00:35,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 198 transitions, 2410 flow, removed 21 selfloop flow, removed 11 redundant places. [2022-11-23 03:00:35,042 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 2188 flow [2022-11-23 03:00:35,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2188, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2022-11-23 03:00:35,042 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 108 predicate places. [2022-11-23 03:00:35,042 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 2188 flow [2022-11-23 03:00:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:35,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:35,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:35,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:35,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:35,243 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 03:00:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -669662258, now seen corresponding path program 2 times [2022-11-23 03:00:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:00:35,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479916950] [2022-11-23 03:00:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:00:35,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:35,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:00:35,245 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:00:35,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:00:35,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:00:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:35,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:00:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:35,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:00:35,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:00:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479916950] [2022-11-23 03:00:35,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479916950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:00:35,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:00:35,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:00:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215711323] [2022-11-23 03:00:35,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:00:35,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:00:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:00:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:00:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:00:35,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 444 [2022-11-23 03:00:35,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 185 transitions, 2188 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:35,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:35,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 444 [2022-11-23 03:00:35,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:43,742 INFO L130 PetriNetUnfolder]: 23128/40144 cut-off events. [2022-11-23 03:00:43,743 INFO L131 PetriNetUnfolder]: For 96743/98441 co-relation queries the response was YES. [2022-11-23 03:00:44,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169213 conditions, 40144 events. 23128/40144 cut-off events. For 96743/98441 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 344399 event pairs, 8780 based on Foata normal form. 878/40618 useless extension candidates. Maximal degree in co-relation 169151. Up to 20256 conditions per place. [2022-11-23 03:00:44,350 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 244 selfloop transitions, 4 changer transitions 2/252 dead transitions. [2022-11-23 03:00:44,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 252 transitions, 3400 flow [2022-11-23 03:00:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:00:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:00:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2022-11-23 03:00:44,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451951951951952 [2022-11-23 03:00:44,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2022-11-23 03:00:44,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2022-11-23 03:00:44,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:44,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2022-11-23 03:00:44,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:44,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:44,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:44,354 INFO L175 Difference]: Start difference. First operand has 157 places, 185 transitions, 2188 flow. Second operand 3 states and 593 transitions. [2022-11-23 03:00:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 252 transitions, 3400 flow [2022-11-23 03:00:45,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 252 transitions, 3392 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-23 03:00:45,194 INFO L231 Difference]: Finished difference. Result has 160 places, 187 transitions, 2213 flow [2022-11-23 03:00:45,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2213, PETRI_PLACES=160, PETRI_TRANSITIONS=187} [2022-11-23 03:00:45,194 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 111 predicate places. [2022-11-23 03:00:45,195 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 187 transitions, 2213 flow [2022-11-23 03:00:45,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:45,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:45,195 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 03:00:45,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:45,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:45,397 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 03:00:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1277528044, now seen corresponding path program 3 times [2022-11-23 03:00:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:00:45,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5616659] [2022-11-23 03:00:45,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:00:45,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:00:45,399 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:00:45,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:00:45,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:00:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:45,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:00:45,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:45,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:00:45,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2022-11-23 03:00:45,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-23 03:00:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 03:00:46,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:00:46,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:00:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5616659] [2022-11-23 03:00:46,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5616659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:00:46,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:00:46,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:00:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349157552] [2022-11-23 03:00:46,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:00:46,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:00:46,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:00:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:00:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:00:47,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-23 03:00:47,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 187 transitions, 2213 flow. Second operand has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:47,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:47,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-23 03:00:47,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:57,188 INFO L130 PetriNetUnfolder]: 23141/40316 cut-off events. [2022-11-23 03:00:57,188 INFO L131 PetriNetUnfolder]: For 114694/115867 co-relation queries the response was YES. [2022-11-23 03:00:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179258 conditions, 40316 events. 23141/40316 cut-off events. For 114694/115867 co-relation queries the response was YES. Maximal size of possible extension queue 1369. Compared 344069 event pairs, 1817 based on Foata normal form. 1362/41420 useless extension candidates. Maximal degree in co-relation 179193. Up to 33872 conditions per place. [2022-11-23 03:00:57,663 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 147 selfloop transitions, 60 changer transitions 0/209 dead transitions. [2022-11-23 03:00:57,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 209 transitions, 2766 flow [2022-11-23 03:00:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:00:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:00:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1053 transitions. [2022-11-23 03:00:57,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3952702702702703 [2022-11-23 03:00:57,666 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1053 transitions. [2022-11-23 03:00:57,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1053 transitions. [2022-11-23 03:00:57,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:57,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1053 transitions. [2022-11-23 03:00:57,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.5) internal successors, (1053), 6 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:57,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:57,668 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:57,668 INFO L175 Difference]: Start difference. First operand has 160 places, 187 transitions, 2213 flow. Second operand 6 states and 1053 transitions. [2022-11-23 03:00:57,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 209 transitions, 2766 flow [2022-11-23 03:00:58,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 209 transitions, 2759 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:00:58,962 INFO L231 Difference]: Finished difference. Result has 167 places, 195 transitions, 2439 flow [2022-11-23 03:00:58,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2439, PETRI_PLACES=167, PETRI_TRANSITIONS=195} [2022-11-23 03:00:58,962 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2022-11-23 03:00:58,962 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 195 transitions, 2439 flow [2022-11-23 03:00:58,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:58,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:58,963 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:58,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:59,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:59,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-23 03:00:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash -811140752, now seen corresponding path program 1 times [2022-11-23 03:00:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:00:59,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408911518] [2022-11-23 03:00:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:59,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:00:59,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:00:59,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:00:59,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01952bfb-38b4-4c7b-a85d-84c299f29eb6/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 03:00:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:00:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:59,371 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 8 treesize of output 7 [2022-11-23 03:00:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:00:59,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:01:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 03:01:02,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:01:02,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408911518] [2022-11-23 03:01:02,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408911518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:01:02,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:01:02,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-23 03:01:02,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018161513] [2022-11-23 03:01:02,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:01:02,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:01:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:01:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:01:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:01:12,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 444 [2022-11-23 03:01:12,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 195 transitions, 2439 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:12,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:12,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 444 [2022-11-23 03:01:12,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:23,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:26,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:29,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:01:32,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:34,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:36,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:38,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:40,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:42,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:01:49,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:01:51,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:01:56,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:01:58,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:02:00,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 03:02:05,816 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 []