./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:30:03,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:30:03,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:30:03,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:30:03,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:30:03,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:30:03,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:30:03,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:30:03,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:30:03,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:30:03,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:30:03,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:30:03,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:30:03,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:30:03,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:30:03,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:30:03,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:30:03,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:30:03,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:30:03,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:30:03,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:30:03,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:30:03,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:30:03,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:30:03,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:30:03,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:30:03,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:30:03,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:30:03,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:30:03,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:30:03,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:30:03,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:30:03,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:30:03,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:30:03,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:30:03,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:30:03,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:30:03,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:30:03,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:30:03,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:30:03,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:30:03,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:30:03,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:30:03,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:30:03,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:30:03,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:30:03,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:30:03,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:30:03,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:30:03,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:30:03,787 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:30:03,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:30:03,787 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:30:03,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:30:03,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:30:03,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:30:03,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:30:03,788 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:30:03,789 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:30:03,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:30:03,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:30:03,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:30:03,789 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:30:03,789 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:30:03,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:30:03,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:30:03,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:30:03,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:30:03,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:30:03,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:30:03,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:30:03,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:30:03,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:30:03,796 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:30:03,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:30:03,797 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_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-11-25 17:30:04,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:30:04,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:30:04,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:30:04,090 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:30:04,091 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:30:04,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-25 17:30:07,179 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:30:07,420 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:30:07,421 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-25 17:30:07,429 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data/16b60083e/e5ee19c0d27842c3ab04cd4c95c6d81c/FLAG743e5594c [2022-11-25 17:30:07,451 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data/16b60083e/e5ee19c0d27842c3ab04cd4c95c6d81c [2022-11-25 17:30:07,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:30:07,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:30:07,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:30:07,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:30:07,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:30:07,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:30:07" (1/1) ... [2022-11-25 17:30:07,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248d80e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:07, skipping insertion in model container [2022-11-25 17:30:07,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:30:07" (1/1) ... [2022-11-25 17:30:07,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:30:07,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:30:07,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,699 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,703 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:07,717 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:07,727 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_99f2854d-87af-4cc7-bf29-92abd025a186/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-25 17:30:07,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:30:07,749 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 17:30:07,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3342b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:07, skipping insertion in model container [2022-11-25 17:30:07,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:30:07,751 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:30:07,753 INFO L158 Benchmark]: Toolchain (without parser) took 293.76ms. Allocated memory is still 182.5MB. Free memory was 140.2MB in the beginning and 129.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:30:07,753 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 64.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:30:07,754 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.02ms. Allocated memory is still 182.5MB. Free memory was 140.2MB in the beginning and 129.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:30:07,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 64.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.02ms. Allocated memory is still 182.5MB. Free memory was 140.2MB in the beginning and 129.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:30:10,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:30:10,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:30:10,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:30:10,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:30:10,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:30:10,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:30:10,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:30:10,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:30:10,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:30:10,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:30:10,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:30:10,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:30:10,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:30:10,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:30:10,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:30:10,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:30:10,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:30:10,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:30:10,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:30:10,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:30:10,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:30:10,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:30:10,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:30:10,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:30:10,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:30:10,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:30:10,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:30:10,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:30:10,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:30:10,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:30:10,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:30:10,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:30:10,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:30:10,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:30:10,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:30:10,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:30:10,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:30:10,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:30:10,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:30:10,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:30:10,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:30:10,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:30:10,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:30:10,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:30:10,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:30:10,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:30:10,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:30:10,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:30:10,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:30:10,194 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:30:10,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:30:10,195 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:30:10,196 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:30:10,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:30:10,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:30:10,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:30:10,197 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:30:10,197 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:30:10,197 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:30:10,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:30:10,198 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:30:10,198 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:30:10,198 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:30:10,198 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:30:10,198 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:30:10,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:30:10,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:30:10,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:30:10,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:30:10,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:30:10,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:30:10,200 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:30:10,201 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:30:10,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:30:10,201 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:30:10,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:30:10,202 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:30:10,202 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_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-11-25 17:30:10,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:30:10,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:30:10,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:30:10,575 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:30:10,576 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:30:10,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-25 17:30:13,906 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:30:14,169 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:30:14,170 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-25 17:30:14,179 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data/ac2936dd6/992d40866c394d82afc5c9de7528afdf/FLAGe15604484 [2022-11-25 17:30:14,203 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/data/ac2936dd6/992d40866c394d82afc5c9de7528afdf [2022-11-25 17:30:14,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:30:14,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:30:14,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:30:14,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:30:14,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:30:14,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b46f0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14, skipping insertion in model container [2022-11-25 17:30:14,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:30:14,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:30:14,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,458 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,460 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,462 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,465 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,473 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,474 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,474 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,475 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,476 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,478 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,482 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,502 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_99f2854d-87af-4cc7-bf29-92abd025a186/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-25 17:30:14,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:30:14,545 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:30:14,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:30:14,566 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,566 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,567 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,567 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,568 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,569 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,570 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,570 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,571 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,572 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,573 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,573 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,574 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,587 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_99f2854d-87af-4cc7-bf29-92abd025a186/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-25 17:30:14,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:30:14,610 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:30:14,629 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,631 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,646 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:30:14,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:30:14,658 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_99f2854d-87af-4cc7-bf29-92abd025a186/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-25 17:30:14,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:30:14,681 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:30:14,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14 WrapperNode [2022-11-25 17:30:14,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:30:14,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:30:14,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:30:14,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:30:14,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,736 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2022-11-25 17:30:14,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:30:14,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:30:14,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:30:14,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:30:14,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:30:14,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:30:14,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:30:14,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:30:14,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (1/1) ... [2022-11-25 17:30:14,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:30:14,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:14,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:30:14,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:30:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:30:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:30:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:30:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:30:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:30:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:30:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:30:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:30:14,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:30:14,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:30:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:30:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:30:14,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:30:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:30:14,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:30:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:30:14,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:30:14,932 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:30:15,098 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:30:15,100 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:30:15,757 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:30:15,918 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:30:15,928 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:30:15,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:30:15 BoogieIcfgContainer [2022-11-25 17:30:15,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:30:15,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:30:15,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:30:15,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:30:15,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:30:14" (1/3) ... [2022-11-25 17:30:15,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7113d17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:30:15, skipping insertion in model container [2022-11-25 17:30:15,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:30:14" (2/3) ... [2022-11-25 17:30:15,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7113d17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:30:15, skipping insertion in model container [2022-11-25 17:30:15,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:30:15" (3/3) ... [2022-11-25 17:30:15,942 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2022-11-25 17:30:15,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:30:15,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-25 17:30:15,962 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:30:16,077 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:30:16,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 204 transitions, 432 flow [2022-11-25 17:30:16,285 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-11-25 17:30:16,286 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:30:16,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 12/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-25 17:30:16,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 204 transitions, 432 flow [2022-11-25 17:30:16,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 196 transitions, 410 flow [2022-11-25 17:30:16,306 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:30:16,333 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 196 transitions, 410 flow [2022-11-25 17:30:16,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 196 transitions, 410 flow [2022-11-25 17:30:16,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 196 transitions, 410 flow [2022-11-25 17:30:16,422 INFO L130 PetriNetUnfolder]: 12/196 cut-off events. [2022-11-25 17:30:16,422 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:30:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 12/196 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 225 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-25 17:30:16,428 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2022-11-25 17:30:47,845 INFO L134 LiptonReduction]: Checked pairs total: 4181 [2022-11-25 17:30:47,845 INFO L136 LiptonReduction]: Total number of compositions: 207 [2022-11-25 17:30:47,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:30:47,869 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;@f66230d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:30:47,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-11-25 17:30:47,873 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:30:47,873 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:47,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:47,874 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:30:47,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 25444, now seen corresponding path program 1 times [2022-11-25 17:30:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:47,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966139581] [2022-11-25 17:30:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:47,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:47,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:47,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:47,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:30:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:30:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:48,380 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:30:48,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:30:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:48,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:30:48,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966139581] [2022-11-25 17:30:48,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966139581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:48,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:48,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:48,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665330790] [2022-11-25 17:30:48,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:48,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 411 [2022-11-25 17:30:48,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:48,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:48,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 411 [2022-11-25 17:30:48,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:49,682 INFO L130 PetriNetUnfolder]: 2075/3129 cut-off events. [2022-11-25 17:30:49,683 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-11-25 17:30:49,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6453 conditions, 3129 events. 2075/3129 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14571 event pairs, 1762 based on Foata normal form. 0/1663 useless extension candidates. Maximal degree in co-relation 2922. Up to 1561 conditions per place. [2022-11-25 17:30:49,711 INFO L137 encePairwiseOnDemand]: 402/411 looper letters, 83 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-11-25 17:30:49,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 384 flow [2022-11-25 17:30:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2022-11-25 17:30:49,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5068937550689375 [2022-11-25 17:30:49,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2022-11-25 17:30:49,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2022-11-25 17:30:49,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:49,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2022-11-25 17:30:49,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,762 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 124 flow. Second operand 3 states and 625 transitions. [2022-11-25 17:30:49,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 384 flow [2022-11-25 17:30:49,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:30:49,774 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 116 flow [2022-11-25 17:30:49,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-11-25 17:30:49,781 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2022-11-25 17:30:49,781 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 116 flow [2022-11-25 17:30:49,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:49,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:49,782 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:30:49,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-25 17:30:49,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:49,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash 25597, now seen corresponding path program 1 times [2022-11-25 17:30:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:49,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743053152] [2022-11-25 17:30:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:49,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:49,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:50,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:30:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:50,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:30:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:50,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:30:50,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743053152] [2022-11-25 17:30:50,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743053152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:50,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:50,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646450040] [2022-11-25 17:30:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:50,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 411 [2022-11-25 17:30:50,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:50,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 411 [2022-11-25 17:30:50,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:50,710 INFO L130 PetriNetUnfolder]: 1038/1570 cut-off events. [2022-11-25 17:30:50,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:50,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1570 events. 1038/1570 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6360 event pairs, 881 based on Foata normal form. 0/836 useless extension candidates. Maximal degree in co-relation 3172. Up to 1561 conditions per place. [2022-11-25 17:30:50,721 INFO L137 encePairwiseOnDemand]: 405/411 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-11-25 17:30:50,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 210 flow [2022-11-25 17:30:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-11-25 17:30:50,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47120843471208435 [2022-11-25 17:30:50,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-11-25 17:30:50,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-11-25 17:30:50,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:50,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-11-25 17:30:50,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,730 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 116 flow. Second operand 3 states and 581 transitions. [2022-11-25 17:30:50,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 210 flow [2022-11-25 17:30:50,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:50,735 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 128 flow [2022-11-25 17:30:50,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2022-11-25 17:30:50,736 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2022-11-25 17:30:50,736 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 128 flow [2022-11-25 17:30:50,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:50,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:50,737 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:30:50,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:50,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:50,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash 25443, now seen corresponding path program 1 times [2022-11-25 17:30:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:50,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403832110] [2022-11-25 17:30:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:50,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:50,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:50,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:30:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:51,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:30:51,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:51,145 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:30:51,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:30:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:51,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:30:51,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403832110] [2022-11-25 17:30:51,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403832110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:51,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:51,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325249341] [2022-11-25 17:30:51,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:51,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:51,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:51,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:51,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 411 [2022-11-25 17:30:51,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:51,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 411 [2022-11-25 17:30:51,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:51,764 INFO L130 PetriNetUnfolder]: 1038/1567 cut-off events. [2022-11-25 17:30:51,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:51,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3185 conditions, 1567 events. 1038/1567 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6366 event pairs, 881 based on Foata normal form. 2/837 useless extension candidates. Maximal degree in co-relation 3171. Up to 1559 conditions per place. [2022-11-25 17:30:51,774 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 42 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-11-25 17:30:51,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 208 flow [2022-11-25 17:30:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-11-25 17:30:51,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45904298459042986 [2022-11-25 17:30:51,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-11-25 17:30:51,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-11-25 17:30:51,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:51,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-11-25 17:30:51,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,784 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 128 flow. Second operand 3 states and 566 transitions. [2022-11-25 17:30:51,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 208 flow [2022-11-25 17:30:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 202 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:30:51,787 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 118 flow [2022-11-25 17:30:51,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2022-11-25 17:30:51,789 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2022-11-25 17:30:51,789 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 118 flow [2022-11-25 17:30:51,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:51,790 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:30:51,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:52,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:52,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash 793157, now seen corresponding path program 1 times [2022-11-25 17:30:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532364603] [2022-11-25 17:30:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:52,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:52,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:30:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:52,238 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 17:30:52,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-25 17:30:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:30:52,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:30:52,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532364603] [2022-11-25 17:30:52,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532364603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:52,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:52,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391218702] [2022-11-25 17:30:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:52,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:52,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:30:52,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 411 [2022-11-25 17:30:52,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:52,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 411 [2022-11-25 17:30:52,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:52,864 INFO L130 PetriNetUnfolder]: 858/1314 cut-off events. [2022-11-25 17:30:52,864 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:52,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1314 events. 858/1314 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5176 event pairs, 725 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 2667. Up to 1306 conditions per place. [2022-11-25 17:30:52,876 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 40 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 17:30:52,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 194 flow [2022-11-25 17:30:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:30:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:30:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2022-11-25 17:30:52,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45742092457420924 [2022-11-25 17:30:52,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2022-11-25 17:30:52,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2022-11-25 17:30:52,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:52,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2022-11-25 17:30:52,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,885 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 118 flow. Second operand 3 states and 564 transitions. [2022-11-25 17:30:52,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 194 flow [2022-11-25 17:30:52,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:52,889 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 113 flow [2022-11-25 17:30:52,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2022-11-25 17:30:52,891 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2022-11-25 17:30:52,891 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 113 flow [2022-11-25 17:30:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:52,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:52,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:30:52,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:53,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:53,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 793159, now seen corresponding path program 1 times [2022-11-25 17:30:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111829368] [2022-11-25 17:30:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:53,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:53,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:53,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:30:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:30:53,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:30:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:30:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:30:53,374 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-25 17:30:53,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-25 17:30:53,399 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:30:53,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 17:30:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:53,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:53,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:53,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111829368] [2022-11-25 17:30:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111829368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:53,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:30:53,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:30:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729088056] [2022-11-25 17:30:53,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:30:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:30:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:30:54,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 411 [2022-11-25 17:30:54,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:54,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:54,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 411 [2022-11-25 17:30:54,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:56,211 INFO L130 PetriNetUnfolder]: 1539/2381 cut-off events. [2022-11-25 17:30:56,211 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:30:56,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 2381 events. 1539/2381 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10817 event pairs, 1294 based on Foata normal form. 0/1348 useless extension candidates. Maximal degree in co-relation 4848. Up to 1306 conditions per place. [2022-11-25 17:30:56,225 INFO L137 encePairwiseOnDemand]: 404/411 looper letters, 75 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2022-11-25 17:30:56,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 405 flow [2022-11-25 17:30:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:30:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:30:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1245 transitions. [2022-11-25 17:30:56,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43274244004171014 [2022-11-25 17:30:56,231 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1245 transitions. [2022-11-25 17:30:56,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1245 transitions. [2022-11-25 17:30:56,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:56,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1245 transitions. [2022-11-25 17:30:56,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.85714285714286) internal successors, (1245), 7 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:56,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:56,242 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:56,242 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 113 flow. Second operand 7 states and 1245 transitions. [2022-11-25 17:30:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 405 flow [2022-11-25 17:30:56,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:56,246 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 193 flow [2022-11-25 17:30:56,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2022-11-25 17:30:56,249 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2022-11-25 17:30:56,250 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 193 flow [2022-11-25 17:30:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:56,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:56,251 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:30:56,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:56,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:56,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 793004, now seen corresponding path program 1 times [2022-11-25 17:30:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:56,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979141035] [2022-11-25 17:30:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:56,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:56,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:56,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:30:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:30:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:56,702 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:30:56,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:30:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:57,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:57,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979141035] [2022-11-25 17:30:57,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979141035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:57,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:30:57,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:30:57,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691325367] [2022-11-25 17:30:57,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:57,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:30:57,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:57,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:30:57,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:30:58,256 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 411 [2022-11-25 17:30:58,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:58,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:58,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 411 [2022-11-25 17:30:58,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:59,321 INFO L130 PetriNetUnfolder]: 1538/2377 cut-off events. [2022-11-25 17:30:59,321 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-11-25 17:30:59,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 2377 events. 1538/2377 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10860 event pairs, 1294 based on Foata normal form. 4/1427 useless extension candidates. Maximal degree in co-relation 4933. Up to 1307 conditions per place. [2022-11-25 17:30:59,348 INFO L137 encePairwiseOnDemand]: 405/411 looper letters, 72 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2022-11-25 17:30:59,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 431 flow [2022-11-25 17:30:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:30:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:30:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1100 transitions. [2022-11-25 17:30:59,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44606650446066504 [2022-11-25 17:30:59,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1100 transitions. [2022-11-25 17:30:59,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1100 transitions. [2022-11-25 17:30:59,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:59,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1100 transitions. [2022-11-25 17:30:59,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:59,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:59,387 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:59,387 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 193 flow. Second operand 6 states and 1100 transitions. [2022-11-25 17:30:59,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 431 flow [2022-11-25 17:30:59,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 411 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 17:30:59,390 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 191 flow [2022-11-25 17:30:59,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2022-11-25 17:30:59,391 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2022-11-25 17:30:59,391 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 191 flow [2022-11-25 17:30:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:59,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:59,392 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 17:30:59,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:59,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:59,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:30:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 24587496, now seen corresponding path program 1 times [2022-11-25 17:30:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:30:59,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637580214] [2022-11-25 17:30:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:59,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:30:59,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:30:59,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:30:59,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:30:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:59,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:30:59,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:59,854 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:30:59,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:30:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:30:59,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:30:59,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:30:59,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637580214] [2022-11-25 17:30:59,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637580214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:30:59,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:30:59,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:30:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208021510] [2022-11-25 17:30:59,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:30:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:30:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:30:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:30:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:00,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 411 [2022-11-25 17:31:00,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 191 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) [2022-11-25 17:31:00,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:00,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 411 [2022-11-25 17:31:00,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:00,631 INFO L130 PetriNetUnfolder]: 1537/2374 cut-off events. [2022-11-25 17:31:00,631 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-11-25 17:31:00,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4935 conditions, 2374 events. 1537/2374 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10816 event pairs, 1294 based on Foata normal form. 1/1422 useless extension candidates. Maximal degree in co-relation 4919. Up to 2358 conditions per place. [2022-11-25 17:31:00,647 INFO L137 encePairwiseOnDemand]: 409/411 looper letters, 44 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2022-11-25 17:31:00,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 257 flow [2022-11-25 17:31:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-11-25 17:31:00,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46553122465531227 [2022-11-25 17:31:00,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-11-25 17:31:00,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-11-25 17:31:00,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:00,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-11-25 17:31:00,653 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) [2022-11-25 17:31:00,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:00,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:00,656 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 191 flow. Second operand 3 states and 574 transitions. [2022-11-25 17:31:00,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 257 flow [2022-11-25 17:31:00,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 232 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-25 17:31:00,659 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 144 flow [2022-11-25 17:31:00,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-11-25 17:31:00,660 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2022-11-25 17:31:00,661 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 144 flow [2022-11-25 17:31:00,661 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) [2022-11-25 17:31:00,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:00,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:31:00,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:00,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:00,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 762242653, now seen corresponding path program 1 times [2022-11-25 17:31:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119113348] [2022-11-25 17:31:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:00,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:00,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:31:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:31:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:01,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:01,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119113348] [2022-11-25 17:31:01,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119113348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:01,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:01,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:31:01,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160049036] [2022-11-25 17:31:01,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:01,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:01,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 411 [2022-11-25 17:31:01,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:01,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:01,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 411 [2022-11-25 17:31:01,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:01,759 INFO L130 PetriNetUnfolder]: 1537/2366 cut-off events. [2022-11-25 17:31:01,759 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-25 17:31:01,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4913 conditions, 2366 events. 1537/2366 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10734 event pairs, 1294 based on Foata normal form. 0/1420 useless extension candidates. Maximal degree in co-relation 4899. Up to 2351 conditions per place. [2022-11-25 17:31:01,778 INFO L137 encePairwiseOnDemand]: 407/411 looper letters, 41 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2022-11-25 17:31:01,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 230 flow [2022-11-25 17:31:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-25 17:31:01,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44931062449310627 [2022-11-25 17:31:01,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-25 17:31:01,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-25 17:31:01,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:01,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-25 17:31:01,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:01,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:01,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:01,786 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 144 flow. Second operand 3 states and 554 transitions. [2022-11-25 17:31:01,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 230 flow [2022-11-25 17:31:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:01,789 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 147 flow [2022-11-25 17:31:01,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2022-11-25 17:31:01,792 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2022-11-25 17:31:01,792 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 147 flow [2022-11-25 17:31:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:01,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:01,793 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:31:01,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:02,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash 762242652, now seen corresponding path program 1 times [2022-11-25 17:31:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:02,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795079207] [2022-11-25 17:31:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:02,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:02,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:02,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:31:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:31:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:02,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:02,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795079207] [2022-11-25 17:31:02,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795079207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:02,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:02,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:31:02,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318275235] [2022-11-25 17:31:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:02,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 411 [2022-11-25 17:31:02,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:02,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:02,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 411 [2022-11-25 17:31:02,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:02,699 INFO L130 PetriNetUnfolder]: 1098/1697 cut-off events. [2022-11-25 17:31:02,699 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:31:02,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3542 conditions, 1697 events. 1098/1697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7103 event pairs, 891 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 3528. Up to 1690 conditions per place. [2022-11-25 17:31:02,708 INFO L137 encePairwiseOnDemand]: 405/411 looper letters, 39 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2022-11-25 17:31:02,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 43 transitions, 225 flow [2022-11-25 17:31:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2022-11-25 17:31:02,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4468775344687753 [2022-11-25 17:31:02,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2022-11-25 17:31:02,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2022-11-25 17:31:02,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:02,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2022-11-25 17:31:02,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:02,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:02,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:02,715 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 147 flow. Second operand 3 states and 551 transitions. [2022-11-25 17:31:02,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 43 transitions, 225 flow [2022-11-25 17:31:02,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 43 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:02,717 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 143 flow [2022-11-25 17:31:02,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2022-11-25 17:31:02,717 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2022-11-25 17:31:02,718 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 143 flow [2022-11-25 17:31:02,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:02,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:02,718 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:31:02,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:02,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:02,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash 762242854, now seen corresponding path program 1 times [2022-11-25 17:31:02,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:02,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965096395] [2022-11-25 17:31:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:02,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:02,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:02,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:02,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:31:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:31:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:03,203 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-25 17:31:03,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-25 17:31:03,222 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 39 treesize of output 37 [2022-11-25 17:31:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:03,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:03,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965096395] [2022-11-25 17:31:03,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965096395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:03,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:03,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:31:03,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581563104] [2022-11-25 17:31:03,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:03,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 411 [2022-11-25 17:31:03,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:03,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 411 [2022-11-25 17:31:03,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:03,937 INFO L130 PetriNetUnfolder]: 1058/1627 cut-off events. [2022-11-25 17:31:03,937 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:31:03,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 1627 events. 1058/1627 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6764 event pairs, 857 based on Foata normal form. 0/1092 useless extension candidates. Maximal degree in co-relation 3393. Up to 1627 conditions per place. [2022-11-25 17:31:03,946 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 40 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-11-25 17:31:03,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 221 flow [2022-11-25 17:31:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-11-25 17:31:03,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557988645579886 [2022-11-25 17:31:03,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-11-25 17:31:03,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-11-25 17:31:03,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:03,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-11-25 17:31:03,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,954 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 143 flow. Second operand 3 states and 562 transitions. [2022-11-25 17:31:03,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 221 flow [2022-11-25 17:31:03,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:03,956 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 137 flow [2022-11-25 17:31:03,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2022-11-25 17:31:03,957 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2022-11-25 17:31:03,957 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 137 flow [2022-11-25 17:31:03,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:03,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:03,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:31:03,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:04,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:04,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash 762242853, now seen corresponding path program 1 times [2022-11-25 17:31:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:04,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263268659] [2022-11-25 17:31:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:04,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:04,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:04,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:04,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:31:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:31:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:04,358 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 17:31:04,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 17:31:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:04,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:04,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:04,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263268659] [2022-11-25 17:31:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263268659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:04,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:31:04,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798566749] [2022-11-25 17:31:04,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:04,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:04,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 411 [2022-11-25 17:31:04,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:04,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:04,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 411 [2022-11-25 17:31:04,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:05,031 INFO L130 PetriNetUnfolder]: 1018/1557 cut-off events. [2022-11-25 17:31:05,032 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-25 17:31:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3268 conditions, 1557 events. 1018/1557 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6403 event pairs, 823 based on Foata normal form. 0/1063 useless extension candidates. Maximal degree in co-relation 3253. Up to 1557 conditions per place. [2022-11-25 17:31:05,041 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 38 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2022-11-25 17:31:05,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 39 transitions, 211 flow [2022-11-25 17:31:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2022-11-25 17:31:05,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45174371451743717 [2022-11-25 17:31:05,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2022-11-25 17:31:05,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2022-11-25 17:31:05,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:05,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2022-11-25 17:31:05,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:05,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:05,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:05,062 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 137 flow. Second operand 3 states and 557 transitions. [2022-11-25 17:31:05,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 39 transitions, 211 flow [2022-11-25 17:31:05,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:05,064 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 134 flow [2022-11-25 17:31:05,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2022-11-25 17:31:05,065 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2022-11-25 17:31:05,065 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 134 flow [2022-11-25 17:31:05,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:05,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:05,066 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:31:05,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:05,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:05,278 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2141211292, now seen corresponding path program 2 times [2022-11-25 17:31:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:05,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044612768] [2022-11-25 17:31:05,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:31:05,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:05,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:05,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:31:05,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:31:05,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:31:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:05,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:31:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:31:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:05,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:06,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:06,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044612768] [2022-11-25 17:31:06,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044612768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:06,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:06,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:31:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808313653] [2022-11-25 17:31:06,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:06,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:31:06,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:31:06,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:31:12,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 411 [2022-11-25 17:31:12,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 134 flow. Second operand has 12 states, 12 states have (on average 170.0) internal successors, (2040), 12 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:12,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:12,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 411 [2022-11-25 17:31:12,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:17,469 INFO L130 PetriNetUnfolder]: 4440/6735 cut-off events. [2022-11-25 17:31:17,469 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2022-11-25 17:31:17,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14165 conditions, 6735 events. 4440/6735 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 35222 event pairs, 3607 based on Foata normal form. 6/4639 useless extension candidates. Maximal degree in co-relation 14149. Up to 867 conditions per place. [2022-11-25 17:31:17,505 INFO L137 encePairwiseOnDemand]: 406/411 looper letters, 238 selfloop transitions, 15 changer transitions 0/253 dead transitions. [2022-11-25 17:31:17,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 253 transitions, 1202 flow [2022-11-25 17:31:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:31:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:31:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2287 transitions. [2022-11-25 17:31:17,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46370640713706407 [2022-11-25 17:31:17,513 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2287 transitions. [2022-11-25 17:31:17,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2287 transitions. [2022-11-25 17:31:17,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:17,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2287 transitions. [2022-11-25 17:31:17,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.58333333333334) internal successors, (2287), 12 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:17,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:17,530 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:17,530 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 134 flow. Second operand 12 states and 2287 transitions. [2022-11-25 17:31:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 253 transitions, 1202 flow [2022-11-25 17:31:17,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 253 transitions, 1201 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:17,535 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 259 flow [2022-11-25 17:31:17,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2022-11-25 17:31:17,536 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2022-11-25 17:31:17,537 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 259 flow [2022-11-25 17:31:17,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 170.0) internal successors, (2040), 12 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:17,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:17,538 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:31:17,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:17,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:17,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2141211137, now seen corresponding path program 2 times [2022-11-25 17:31:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:17,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402325467] [2022-11-25 17:31:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:31:17,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:17,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:17,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:31:17,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:31:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:31:17,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:17,993 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-25 17:31:17,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-25 17:31:18,024 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-25 17:31:18,024 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 90 treesize of output 89 [2022-11-25 17:31:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:31:18,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:18,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402325467] [2022-11-25 17:31:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402325467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:18,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:18,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:31:18,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142308017] [2022-11-25 17:31:18,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:18,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:18,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:18,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:18,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 411 [2022-11-25 17:31:18,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:18,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:18,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 411 [2022-11-25 17:31:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:19,191 INFO L130 PetriNetUnfolder]: 3563/5503 cut-off events. [2022-11-25 17:31:19,191 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-25 17:31:19,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11368 conditions, 5503 events. 3563/5503 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28850 event pairs, 2872 based on Foata normal form. 350/4045 useless extension candidates. Maximal degree in co-relation 11344. Up to 5503 conditions per place. [2022-11-25 17:31:19,226 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 44 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 17:31:19,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 45 transitions, 312 flow [2022-11-25 17:31:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2022-11-25 17:31:19,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45255474452554745 [2022-11-25 17:31:19,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2022-11-25 17:31:19,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2022-11-25 17:31:19,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:19,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2022-11-25 17:31:19,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:19,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:19,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:19,235 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 259 flow. Second operand 3 states and 558 transitions. [2022-11-25 17:31:19,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 45 transitions, 312 flow [2022-11-25 17:31:19,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 45 transitions, 294 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 17:31:19,237 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 206 flow [2022-11-25 17:31:19,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2022-11-25 17:31:19,238 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2022-11-25 17:31:19,238 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 206 flow [2022-11-25 17:31:19,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:19,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:19,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:19,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-25 17:31:19,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:19,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1924196858, now seen corresponding path program 1 times [2022-11-25 17:31:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:19,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894275585] [2022-11-25 17:31:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:19,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:19,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:19,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:19,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:31:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:31:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:19,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:19,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894275585] [2022-11-25 17:31:19,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894275585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:19,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:19,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:31:19,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223910670] [2022-11-25 17:31:19,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:19,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:31:19,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:31:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:31:19,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 411 [2022-11-25 17:31:20,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 170.16666666666666) internal successors, (1021), 6 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:20,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:20,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 411 [2022-11-25 17:31:20,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:21,404 INFO L130 PetriNetUnfolder]: 5147/7999 cut-off events. [2022-11-25 17:31:21,404 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-11-25 17:31:21,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16442 conditions, 7999 events. 5147/7999 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 46312 event pairs, 2872 based on Foata normal form. 0/5343 useless extension candidates. Maximal degree in co-relation 16418. Up to 5490 conditions per place. [2022-11-25 17:31:21,456 INFO L137 encePairwiseOnDemand]: 406/411 looper letters, 60 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2022-11-25 17:31:21,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 393 flow [2022-11-25 17:31:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:31:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:31:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 900 transitions. [2022-11-25 17:31:21,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2022-11-25 17:31:21,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 900 transitions. [2022-11-25 17:31:21,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 900 transitions. [2022-11-25 17:31:21,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:21,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 900 transitions. [2022-11-25 17:31:21,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:21,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:21,467 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:21,467 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 206 flow. Second operand 5 states and 900 transitions. [2022-11-25 17:31:21,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 393 flow [2022-11-25 17:31:21,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:21,470 INFO L231 Difference]: Finished difference. Result has 67 places, 46 transitions, 229 flow [2022-11-25 17:31:21,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=67, PETRI_TRANSITIONS=46} [2022-11-25 17:31:21,471 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2022-11-25 17:31:21,471 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 46 transitions, 229 flow [2022-11-25 17:31:21,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.16666666666666) internal successors, (1021), 6 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:21,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:21,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:21,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:21,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:21,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1924006016, now seen corresponding path program 1 times [2022-11-25 17:31:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:21,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169343671] [2022-11-25 17:31:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:21,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:21,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:21,687 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:21,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:31:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:21,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:31:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:21,925 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 17:31:21,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-25 17:31:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:21,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:21,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:21,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169343671] [2022-11-25 17:31:21,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169343671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:21,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:21,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:31:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064145727] [2022-11-25 17:31:21,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:21,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:21,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:21,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:22,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 411 [2022-11-25 17:31:22,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 46 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:22,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:22,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 411 [2022-11-25 17:31:22,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:23,227 INFO L130 PetriNetUnfolder]: 4571/7111 cut-off events. [2022-11-25 17:31:23,227 INFO L131 PetriNetUnfolder]: For 1491/1491 co-relation queries the response was YES. [2022-11-25 17:31:23,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16158 conditions, 7111 events. 4571/7111 cut-off events. For 1491/1491 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 39035 event pairs, 3816 based on Foata normal form. 0/5591 useless extension candidates. Maximal degree in co-relation 16132. Up to 7111 conditions per place. [2022-11-25 17:31:23,268 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 17:31:23,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 44 transitions, 313 flow [2022-11-25 17:31:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2022-11-25 17:31:23,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44120032441200324 [2022-11-25 17:31:23,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2022-11-25 17:31:23,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2022-11-25 17:31:23,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:23,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2022-11-25 17:31:23,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:23,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:23,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:23,276 INFO L175 Difference]: Start difference. First operand has 67 places, 46 transitions, 229 flow. Second operand 3 states and 544 transitions. [2022-11-25 17:31:23,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 44 transitions, 313 flow [2022-11-25 17:31:23,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 299 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:31:23,279 INFO L231 Difference]: Finished difference. Result has 64 places, 44 transitions, 213 flow [2022-11-25 17:31:23,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=213, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2022-11-25 17:31:23,280 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2022-11-25 17:31:23,280 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 213 flow [2022-11-25 17:31:23,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:23,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:23,281 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:23,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:23,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:23,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1924006014, now seen corresponding path program 1 times [2022-11-25 17:31:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436645030] [2022-11-25 17:31:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:23,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:23,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:23,496 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:23,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:31:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:31:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:23,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:31:23,747 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 17:31:23,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 17:31:23,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 17:31:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:23,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:23,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:23,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436645030] [2022-11-25 17:31:23,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436645030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:23,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:23,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:31:23,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965776149] [2022-11-25 17:31:23,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:23,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:31:23,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:31:23,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:31:23,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 411 [2022-11-25 17:31:23,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:23,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:23,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 411 [2022-11-25 17:31:23,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:24,667 INFO L130 PetriNetUnfolder]: 3995/6223 cut-off events. [2022-11-25 17:31:24,667 INFO L131 PetriNetUnfolder]: For 767/767 co-relation queries the response was YES. [2022-11-25 17:31:24,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13916 conditions, 6223 events. 3995/6223 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 33564 event pairs, 3336 based on Foata normal form. 0/5167 useless extension candidates. Maximal degree in co-relation 13890. Up to 6223 conditions per place. [2022-11-25 17:31:24,697 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 17:31:24,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 42 transitions, 293 flow [2022-11-25 17:31:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:31:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:31:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-25 17:31:24,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44931062449310627 [2022-11-25 17:31:24,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-25 17:31:24,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-25 17:31:24,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:24,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-25 17:31:24,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:24,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:24,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:24,704 INFO L175 Difference]: Start difference. First operand has 64 places, 44 transitions, 213 flow. Second operand 3 states and 554 transitions. [2022-11-25 17:31:24,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 42 transitions, 293 flow [2022-11-25 17:31:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:24,707 INFO L231 Difference]: Finished difference. Result has 63 places, 42 transitions, 210 flow [2022-11-25 17:31:24,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=63, PETRI_TRANSITIONS=42} [2022-11-25 17:31:24,708 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2022-11-25 17:31:24,708 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 42 transitions, 210 flow [2022-11-25 17:31:24,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:24,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:24,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:24,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:24,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:24,921 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash 479444496, now seen corresponding path program 1 times [2022-11-25 17:31:24,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:24,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403608663] [2022-11-25 17:31:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:24,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:24,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:24,923 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:31:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:31:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:25,184 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:31:25,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:31:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:25,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:25,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403608663] [2022-11-25 17:31:25,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403608663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:25,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:25,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:31:25,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715747432] [2022-11-25 17:31:25,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:31:25,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:31:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:31:28,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 411 [2022-11-25 17:31:28,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 42 transitions, 210 flow. Second operand has 10 states, 10 states have (on average 165.6) internal successors, (1656), 10 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:28,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:28,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 411 [2022-11-25 17:31:28,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:31,122 INFO L130 PetriNetUnfolder]: 5995/8991 cut-off events. [2022-11-25 17:31:31,122 INFO L131 PetriNetUnfolder]: For 535/535 co-relation queries the response was YES. [2022-11-25 17:31:31,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20365 conditions, 8991 events. 5995/8991 cut-off events. For 535/535 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 51107 event pairs, 1544 based on Foata normal form. 256/7903 useless extension candidates. Maximal degree in co-relation 20338. Up to 3026 conditions per place. [2022-11-25 17:31:31,185 INFO L137 encePairwiseOnDemand]: 405/411 looper letters, 85 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2022-11-25 17:31:31,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 535 flow [2022-11-25 17:31:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:31:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:31:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1400 transitions. [2022-11-25 17:31:31,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4257907542579075 [2022-11-25 17:31:31,191 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1400 transitions. [2022-11-25 17:31:31,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1400 transitions. [2022-11-25 17:31:31,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:31,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1400 transitions. [2022-11-25 17:31:31,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 175.0) internal successors, (1400), 8 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:31,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 411.0) internal successors, (3699), 9 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:31,202 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 411.0) internal successors, (3699), 9 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:31,203 INFO L175 Difference]: Start difference. First operand has 63 places, 42 transitions, 210 flow. Second operand 8 states and 1400 transitions. [2022-11-25 17:31:31,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 535 flow [2022-11-25 17:31:31,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 532 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:31:31,208 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 282 flow [2022-11-25 17:31:31,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=282, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2022-11-25 17:31:31,209 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2022-11-25 17:31:31,209 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 282 flow [2022-11-25 17:31:31,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.6) internal successors, (1656), 10 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:31,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:31,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:31,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:31,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2133989611, now seen corresponding path program 1 times [2022-11-25 17:31:31,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:31,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918987511] [2022-11-25 17:31:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:31,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:31,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:31,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:31:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:31:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:31,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:31:31,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918987511] [2022-11-25 17:31:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918987511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:31:31,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:31:31,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:31:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990911957] [2022-11-25 17:31:31,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:31:31,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:31:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:31:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:31:32,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 411 [2022-11-25 17:31:32,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 170.5) internal successors, (1023), 6 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:32,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:32,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 411 [2022-11-25 17:31:32,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:33,681 INFO L130 PetriNetUnfolder]: 8331/12511 cut-off events. [2022-11-25 17:31:33,682 INFO L131 PetriNetUnfolder]: For 16753/16753 co-relation queries the response was YES. [2022-11-25 17:31:33,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36349 conditions, 12511 events. 8331/12511 cut-off events. For 16753/16753 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 72426 event pairs, 4680 based on Foata normal form. 0/10879 useless extension candidates. Maximal degree in co-relation 36316. Up to 8978 conditions per place. [2022-11-25 17:31:33,776 INFO L137 encePairwiseOnDemand]: 406/411 looper letters, 62 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2022-11-25 17:31:33,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 526 flow [2022-11-25 17:31:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:31:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:31:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 890 transitions. [2022-11-25 17:31:33,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43309002433090027 [2022-11-25 17:31:33,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 890 transitions. [2022-11-25 17:31:33,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 890 transitions. [2022-11-25 17:31:33,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:33,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 890 transitions. [2022-11-25 17:31:33,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:33,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:33,786 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:33,786 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 282 flow. Second operand 5 states and 890 transitions. [2022-11-25 17:31:33,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 526 flow [2022-11-25 17:31:33,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 499 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 17:31:33,809 INFO L231 Difference]: Finished difference. Result has 76 places, 48 transitions, 289 flow [2022-11-25 17:31:33,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=76, PETRI_TRANSITIONS=48} [2022-11-25 17:31:33,810 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2022-11-25 17:31:33,810 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 48 transitions, 289 flow [2022-11-25 17:31:33,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.5) internal successors, (1023), 6 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:33,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:33,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:33,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:34,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:34,023 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:34,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1729164689, now seen corresponding path program 1 times [2022-11-25 17:31:34,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:34,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429906360] [2022-11-25 17:31:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:34,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:34,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:34,025 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:34,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:31:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:31:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:34,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:31:34,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:31:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:34,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:31:34,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:34,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429906360] [2022-11-25 17:31:34,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429906360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:34,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:34,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:31:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882956324] [2022-11-25 17:31:34,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:31:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:31:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:31:38,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 411 [2022-11-25 17:31:38,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 48 transitions, 289 flow. Second operand has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:38,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:38,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 411 [2022-11-25 17:31:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:41,839 INFO L130 PetriNetUnfolder]: 12875/18687 cut-off events. [2022-11-25 17:31:41,839 INFO L131 PetriNetUnfolder]: For 22561/22561 co-relation queries the response was YES. [2022-11-25 17:31:41,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55144 conditions, 18687 events. 12875/18687 cut-off events. For 22561/22561 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 107022 event pairs, 3640 based on Foata normal form. 544/18687 useless extension candidates. Maximal degree in co-relation 55110. Up to 7154 conditions per place. [2022-11-25 17:31:41,980 INFO L137 encePairwiseOnDemand]: 405/411 looper letters, 113 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2022-11-25 17:31:41,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 126 transitions, 889 flow [2022-11-25 17:31:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:31:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:31:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1398 transitions. [2022-11-25 17:31:41,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4251824817518248 [2022-11-25 17:31:41,985 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1398 transitions. [2022-11-25 17:31:41,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1398 transitions. [2022-11-25 17:31:41,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:41,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1398 transitions. [2022-11-25 17:31:41,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.75) internal successors, (1398), 8 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:41,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 411.0) internal successors, (3699), 9 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:41,994 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 411.0) internal successors, (3699), 9 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:41,994 INFO L175 Difference]: Start difference. First operand has 76 places, 48 transitions, 289 flow. Second operand 8 states and 1398 transitions. [2022-11-25 17:31:41,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 126 transitions, 889 flow [2022-11-25 17:31:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 126 transitions, 873 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 17:31:42,024 INFO L231 Difference]: Finished difference. Result has 85 places, 53 transitions, 348 flow [2022-11-25 17:31:42,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=348, PETRI_PLACES=85, PETRI_TRANSITIONS=53} [2022-11-25 17:31:42,025 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2022-11-25 17:31:42,025 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 53 transitions, 348 flow [2022-11-25 17:31:42,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:42,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:42,026 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:42,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-25 17:31:42,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:42,238 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:31:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1925330810, now seen corresponding path program 2 times [2022-11-25 17:31:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:31:42,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225260114] [2022-11-25 17:31:42,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:31:42,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:31:42,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:31:42,240 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:31:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:31:42,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:31:42,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:42,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:31:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:42,548 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:31:42,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:31:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:42,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:44,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:31:44,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225260114] [2022-11-25 17:31:44,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225260114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:44,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:44,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-25 17:31:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603925014] [2022-11-25 17:31:44,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:44,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:31:44,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:31:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:31:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:31:56,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2022-11-25 17:31:56,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 53 transitions, 348 flow. Second operand has 18 states, 18 states have (on average 158.22222222222223) internal successors, (2848), 18 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:56,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:56,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2022-11-25 17:31:56,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:10,875 INFO L130 PetriNetUnfolder]: 12915/18945 cut-off events. [2022-11-25 17:32:10,875 INFO L131 PetriNetUnfolder]: For 39682/39682 co-relation queries the response was YES. [2022-11-25 17:32:10,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67564 conditions, 18945 events. 12915/18945 cut-off events. For 39682/39682 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 111365 event pairs, 5312 based on Foata normal form. 186/19131 useless extension candidates. Maximal degree in co-relation 67525. Up to 7861 conditions per place. [2022-11-25 17:32:11,049 INFO L137 encePairwiseOnDemand]: 403/411 looper letters, 301 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2022-11-25 17:32:11,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 325 transitions, 2372 flow [2022-11-25 17:32:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:32:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:32:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3212 transitions. [2022-11-25 17:32:11,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41132027148162376 [2022-11-25 17:32:11,057 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3212 transitions. [2022-11-25 17:32:11,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3212 transitions. [2022-11-25 17:32:11,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:11,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3212 transitions. [2022-11-25 17:32:11,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 169.05263157894737) internal successors, (3212), 19 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:11,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:11,078 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:11,078 INFO L175 Difference]: Start difference. First operand has 85 places, 53 transitions, 348 flow. Second operand 19 states and 3212 transitions. [2022-11-25 17:32:11,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 325 transitions, 2372 flow [2022-11-25 17:32:11,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 325 transitions, 2224 flow, removed 56 selfloop flow, removed 3 redundant places. [2022-11-25 17:32:11,207 INFO L231 Difference]: Finished difference. Result has 105 places, 68 transitions, 514 flow [2022-11-25 17:32:11,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=514, PETRI_PLACES=105, PETRI_TRANSITIONS=68} [2022-11-25 17:32:11,208 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2022-11-25 17:32:11,209 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 68 transitions, 514 flow [2022-11-25 17:32:11,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 158.22222222222223) internal successors, (2848), 18 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:11,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:11,210 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:32:11,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:11,422 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:32:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash 593743972, now seen corresponding path program 3 times [2022-11-25 17:32:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:11,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226917881] [2022-11-25 17:32:11,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:32:11,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:11,424 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:11,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:32:11,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:32:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:32:11,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:11,797 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:32:11,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:32:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:12,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:15,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226917881] [2022-11-25 17:32:15,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226917881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:15,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:15,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:32:15,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537130415] [2022-11-25 17:32:15,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:15,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:32:15,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:32:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:32:37,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 411 [2022-11-25 17:32:37,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 68 transitions, 514 flow. Second operand has 24 states, 24 states have (on average 170.0) internal successors, (4080), 24 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:37,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:37,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 411 [2022-11-25 17:32:37,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:06,724 INFO L130 PetriNetUnfolder]: 32223/46965 cut-off events. [2022-11-25 17:33:06,724 INFO L131 PetriNetUnfolder]: For 132686/132686 co-relation queries the response was YES. [2022-11-25 17:33:07,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176561 conditions, 46965 events. 32223/46965 cut-off events. For 132686/132686 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 284392 event pairs, 24676 based on Foata normal form. 12/46977 useless extension candidates. Maximal degree in co-relation 176517. Up to 6891 conditions per place. [2022-11-25 17:33:07,316 INFO L137 encePairwiseOnDemand]: 407/411 looper letters, 721 selfloop transitions, 25 changer transitions 0/746 dead transitions. [2022-11-25 17:33:07,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 746 transitions, 5720 flow [2022-11-25 17:33:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:33:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:33:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4574 transitions. [2022-11-25 17:33:07,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46370640713706407 [2022-11-25 17:33:07,322 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4574 transitions. [2022-11-25 17:33:07,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4574 transitions. [2022-11-25 17:33:07,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:07,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4574 transitions. [2022-11-25 17:33:07,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 190.58333333333334) internal successors, (4574), 24 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:07,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:07,344 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:07,344 INFO L175 Difference]: Start difference. First operand has 105 places, 68 transitions, 514 flow. Second operand 24 states and 4574 transitions. [2022-11-25 17:33:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 746 transitions, 5720 flow [2022-11-25 17:33:07,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 746 transitions, 5624 flow, removed 29 selfloop flow, removed 7 redundant places. [2022-11-25 17:33:07,860 INFO L231 Difference]: Finished difference. Result has 134 places, 82 transitions, 660 flow [2022-11-25 17:33:07,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=660, PETRI_PLACES=134, PETRI_TRANSITIONS=82} [2022-11-25 17:33:07,861 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2022-11-25 17:33:07,861 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 82 transitions, 660 flow [2022-11-25 17:33:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 170.0) internal successors, (4080), 24 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:07,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:07,862 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:07,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:08,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:08,076 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:33:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 296283541, now seen corresponding path program 2 times [2022-11-25 17:33:08,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419277036] [2022-11-25 17:33:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:33:08,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:08,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:08,078 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:08,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 17:33:08,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:33:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:33:08,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:08,387 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:33:08,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:33:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:08,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:10,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:10,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419277036] [2022-11-25 17:33:10,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419277036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:10,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:10,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-25 17:33:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996708865] [2022-11-25 17:33:10,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:10,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:33:10,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:10,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:33:10,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:33:23,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2022-11-25 17:33:23,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 82 transitions, 660 flow. Second operand has 18 states, 18 states have (on average 158.44444444444446) internal successors, (2852), 18 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:23,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:23,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2022-11-25 17:33:23,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:42,799 INFO L130 PetriNetUnfolder]: 32779/48005 cut-off events. [2022-11-25 17:33:42,799 INFO L131 PetriNetUnfolder]: For 133176/133176 co-relation queries the response was YES. [2022-11-25 17:33:43,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178811 conditions, 48005 events. 32779/48005 cut-off events. For 133176/133176 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 299762 event pairs, 17652 based on Foata normal form. 222/48227 useless extension candidates. Maximal degree in co-relation 178756. Up to 29637 conditions per place. [2022-11-25 17:33:43,334 INFO L137 encePairwiseOnDemand]: 403/411 looper letters, 315 selfloop transitions, 24 changer transitions 0/339 dead transitions. [2022-11-25 17:33:43,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 339 transitions, 2700 flow [2022-11-25 17:33:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:33:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:33:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3203 transitions. [2022-11-25 17:33:43,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41016775515430914 [2022-11-25 17:33:43,340 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3203 transitions. [2022-11-25 17:33:43,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3203 transitions. [2022-11-25 17:33:43,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:43,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3203 transitions. [2022-11-25 17:33:43,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 168.57894736842104) internal successors, (3203), 19 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:43,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:43,352 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:43,353 INFO L175 Difference]: Start difference. First operand has 134 places, 82 transitions, 660 flow. Second operand 19 states and 3203 transitions. [2022-11-25 17:33:43,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 339 transitions, 2700 flow [2022-11-25 17:33:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 339 transitions, 2668 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-25 17:33:43,829 INFO L231 Difference]: Finished difference. Result has 147 places, 96 transitions, 797 flow [2022-11-25 17:33:43,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=797, PETRI_PLACES=147, PETRI_TRANSITIONS=96} [2022-11-25 17:33:43,829 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 87 predicate places. [2022-11-25 17:33:43,830 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 96 transitions, 797 flow [2022-11-25 17:33:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 158.44444444444446) internal successors, (2852), 18 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:43,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:43,831 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:43,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:44,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:44,032 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:33:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1076746200, now seen corresponding path program 3 times [2022-11-25 17:33:44,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:44,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812321663] [2022-11-25 17:33:44,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:33:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:44,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 17:33:44,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:33:44,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:44,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:33:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:44,515 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:33:44,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:33:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:45,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:45,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:33:45,073 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 17:33:45,076 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 17:33:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:46,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:46,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812321663] [2022-11-25 17:33:46,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812321663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:46,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:46,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-25 17:33:46,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033703617] [2022-11-25 17:33:46,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:33:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:33:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:33:58,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 411 [2022-11-25 17:33:58,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 96 transitions, 797 flow. Second operand has 20 states, 20 states have (on average 162.25) internal successors, (3245), 20 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:58,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:58,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 411 [2022-11-25 17:33:58,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:19,832 INFO L130 PetriNetUnfolder]: 31193/45855 cut-off events. [2022-11-25 17:34:19,832 INFO L131 PetriNetUnfolder]: For 166601/166601 co-relation queries the response was YES. [2022-11-25 17:34:20,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186672 conditions, 45855 events. 31193/45855 cut-off events. For 166601/166601 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 286642 event pairs, 18350 based on Foata normal form. 222/46077 useless extension candidates. Maximal degree in co-relation 186611. Up to 34230 conditions per place. [2022-11-25 17:34:20,397 INFO L137 encePairwiseOnDemand]: 404/411 looper letters, 412 selfloop transitions, 27 changer transitions 0/439 dead transitions. [2022-11-25 17:34:20,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 439 transitions, 3793 flow [2022-11-25 17:34:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:34:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:34:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3636 transitions. [2022-11-25 17:34:20,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42127215849843586 [2022-11-25 17:34:20,407 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3636 transitions. [2022-11-25 17:34:20,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3636 transitions. [2022-11-25 17:34:20,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:20,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3636 transitions. [2022-11-25 17:34:20,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 173.14285714285714) internal successors, (3636), 21 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:20,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:20,417 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:20,417 INFO L175 Difference]: Start difference. First operand has 147 places, 96 transitions, 797 flow. Second operand 21 states and 3636 transitions. [2022-11-25 17:34:20,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 439 transitions, 3793 flow [2022-11-25 17:34:21,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 439 transitions, 3583 flow, removed 99 selfloop flow, removed 4 redundant places. [2022-11-25 17:34:21,954 INFO L231 Difference]: Finished difference. Result has 171 places, 104 transitions, 935 flow [2022-11-25 17:34:21,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=935, PETRI_PLACES=171, PETRI_TRANSITIONS=104} [2022-11-25 17:34:21,955 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 111 predicate places. [2022-11-25 17:34:21,956 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 104 transitions, 935 flow [2022-11-25 17:34:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.25) internal successors, (3245), 20 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:21,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:21,956 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:21,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:22,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:22,157 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:34:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:22,157 INFO L85 PathProgramCache]: Analyzing trace with hash 183905342, now seen corresponding path program 4 times [2022-11-25 17:34:22,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:22,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695271497] [2022-11-25 17:34:22,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:34:22,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:22,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:22,159 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:22,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 17:34:22,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:34:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:34:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:22,494 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:34:22,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:34:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:23,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:25,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695271497] [2022-11-25 17:34:25,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695271497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:25,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:34:25,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:34:25,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398430812] [2022-11-25 17:34:25,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:34:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:34:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:34:47,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 411 [2022-11-25 17:34:47,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 104 transitions, 935 flow. Second operand has 24 states, 24 states have (on average 161.16666666666666) internal successors, (3868), 24 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:47,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:47,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 411 [2022-11-25 17:34:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:31,768 INFO L130 PetriNetUnfolder]: 46281/66491 cut-off events. [2022-11-25 17:35:31,768 INFO L131 PetriNetUnfolder]: For 288805/288805 co-relation queries the response was YES. [2022-11-25 17:35:32,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287088 conditions, 66491 events. 46281/66491 cut-off events. For 288805/288805 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 419408 event pairs, 7150 based on Foata normal form. 9176/75667 useless extension candidates. Maximal degree in co-relation 287018. Up to 13216 conditions per place. [2022-11-25 17:35:32,681 INFO L137 encePairwiseOnDemand]: 404/411 looper letters, 614 selfloop transitions, 51 changer transitions 0/665 dead transitions. [2022-11-25 17:35:32,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 665 transitions, 5349 flow [2022-11-25 17:35:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:35:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 17:35:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6365 transitions. [2022-11-25 17:35:32,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41855724337476163 [2022-11-25 17:35:32,694 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6365 transitions. [2022-11-25 17:35:32,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6365 transitions. [2022-11-25 17:35:32,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:32,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6365 transitions. [2022-11-25 17:35:32,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 172.02702702702703) internal successors, (6365), 37 states have internal predecessors, (6365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:32,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 411.0) internal successors, (15618), 38 states have internal predecessors, (15618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:32,722 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 411.0) internal successors, (15618), 38 states have internal predecessors, (15618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:32,722 INFO L175 Difference]: Start difference. First operand has 171 places, 104 transitions, 935 flow. Second operand 37 states and 6365 transitions. [2022-11-25 17:35:32,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 665 transitions, 5349 flow [2022-11-25 17:35:34,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 665 transitions, 5285 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-25 17:35:34,842 INFO L231 Difference]: Finished difference. Result has 203 places, 115 transitions, 1099 flow [2022-11-25 17:35:34,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1099, PETRI_PLACES=203, PETRI_TRANSITIONS=115} [2022-11-25 17:35:34,842 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 143 predicate places. [2022-11-25 17:35:34,843 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 115 transitions, 1099 flow [2022-11-25 17:35:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 161.16666666666666) internal successors, (3868), 24 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:34,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:34,844 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:34,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:35:35,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:35,057 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:35:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:35,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1501995465, now seen corresponding path program 3 times [2022-11-25 17:35:35,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:35,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926656961] [2022-11-25 17:35:35,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:35:35,058 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 [2022-11-25 17:35:35,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:35,059 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:35:35,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 17:35:35,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:35:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:35:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:35:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:35,467 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:35:35,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:35:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:35:35,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:36,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:35:36,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 17:35:36,171 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 17:35:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:35:38,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:38,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926656961] [2022-11-25 17:35:38,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926656961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:38,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:35:38,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-25 17:35:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106257191] [2022-11-25 17:35:38,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:35:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:35:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:35:59,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 411 [2022-11-25 17:35:59,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 115 transitions, 1099 flow. Second operand has 21 states, 21 states have (on average 162.42857142857142) internal successors, (3411), 21 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:59,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:59,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 411 [2022-11-25 17:35:59,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:26,527 INFO L130 PetriNetUnfolder]: 46549/67065 cut-off events. [2022-11-25 17:36:26,527 INFO L131 PetriNetUnfolder]: For 312967/312967 co-relation queries the response was YES. [2022-11-25 17:36:27,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314028 conditions, 67065 events. 46549/67065 cut-off events. For 312967/312967 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 416003 event pairs, 28606 based on Foata normal form. 184/67249 useless extension candidates. Maximal degree in co-relation 313955. Up to 53750 conditions per place. [2022-11-25 17:36:27,479 INFO L137 encePairwiseOnDemand]: 404/411 looper letters, 391 selfloop transitions, 31 changer transitions 0/422 dead transitions. [2022-11-25 17:36:27,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 422 transitions, 3976 flow [2022-11-25 17:36:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:36:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:36:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3803 transitions. [2022-11-25 17:36:27,486 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4205927892059279 [2022-11-25 17:36:27,486 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3803 transitions. [2022-11-25 17:36:27,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3803 transitions. [2022-11-25 17:36:27,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:27,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3803 transitions. [2022-11-25 17:36:27,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 172.86363636363637) internal successors, (3803), 22 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:27,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 411.0) internal successors, (9453), 23 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:27,501 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 411.0) internal successors, (9453), 23 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:27,502 INFO L175 Difference]: Start difference. First operand has 203 places, 115 transitions, 1099 flow. Second operand 22 states and 3803 transitions. [2022-11-25 17:36:27,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 422 transitions, 3976 flow [2022-11-25 17:36:31,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 422 transitions, 3287 flow, removed 120 selfloop flow, removed 24 redundant places. [2022-11-25 17:36:31,269 INFO L231 Difference]: Finished difference. Result has 207 places, 127 transitions, 1126 flow [2022-11-25 17:36:31,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1126, PETRI_PLACES=207, PETRI_TRANSITIONS=127} [2022-11-25 17:36:31,270 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 147 predicate places. [2022-11-25 17:36:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 127 transitions, 1126 flow [2022-11-25 17:36:31,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 162.42857142857142) internal successors, (3411), 21 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:31,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:31,271 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:31,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:36:31,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:31,472 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-25 17:36:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 47661901, now seen corresponding path program 4 times [2022-11-25 17:36:31,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:31,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736703931] [2022-11-25 17:36:31,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:36:31,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:31,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:31,474 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:36:31,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f2854d-87af-4cc7-bf29-92abd025a186/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 17:36:31,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:36:31,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:36:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:36:31,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:31,780 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:36:31,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:36:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:32,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:36:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:34,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:34,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736703931] [2022-11-25 17:36:34,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736703931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:36:34,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:36:34,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:36:34,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463464879] [2022-11-25 17:36:34,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:34,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:36:34,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:36:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:36:58,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 411 [2022-11-25 17:36:58,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 127 transitions, 1126 flow. Second operand has 24 states, 24 states have (on average 161.33333333333334) internal successors, (3872), 24 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:58,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:58,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 411 [2022-11-25 17:36:58,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand