./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.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_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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_1c36aded-2ff5-48f6-97b3-18593edd7263/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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 15:37:18,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:37:18,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:37:18,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:37:18,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:37:18,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:37:18,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:37:18,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:37:18,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:37:18,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:37:18,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:37:18,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:37:18,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:37:18,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:37:18,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:37:18,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:37:18,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:37:18,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:37:18,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:37:18,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:37:18,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:37:18,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:37:18,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:37:18,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:37:18,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:37:18,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:37:18,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:37:18,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:37:18,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:37:18,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:37:18,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:37:18,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:37:18,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:37:18,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:37:18,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:37:18,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:37:18,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:37:18,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:37:18,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:37:18,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:37:18,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:37:18,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:37:18,991 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:37:18,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:37:18,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:37:18,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:37:18,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:37:18,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:37:18,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:37:18,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:37:18,994 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:37:18,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:37:18,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:37:18,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:37:18,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:37:18,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:37:18,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:37:18,996 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:37:18,997 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:37:18,997 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:37:18,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:37:18,997 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:37:18,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:37:18,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:37:18,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:37:18,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:37:18,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:37:18,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:37:18,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:37:18,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:37:19,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:37:19,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:37:19,000 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:37:19,000 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:37:19,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:37:19,001 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_1c36aded-2ff5-48f6-97b3-18593edd7263/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-11-25 15:37:19,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:37:19,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:37:19,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:37:19,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:37:19,316 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:37:19,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-25 15:37:22,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:37:22,561 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:37:22,561 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-25 15:37:22,571 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data/58fe12885/3d2d4c839f5440a6aba4a3aa43d6c0a0/FLAGf21227540 [2022-11-25 15:37:22,591 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data/58fe12885/3d2d4c839f5440a6aba4a3aa43d6c0a0 [2022-11-25 15:37:22,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:37:22,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:37:22,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:22,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:37:22,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:37:22,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:22" (1/1) ... [2022-11-25 15:37:22,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b370b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:22, skipping insertion in model container [2022-11-25 15:37:22,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:22" (1/1) ... [2022-11-25 15:37:22,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:37:22,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:37:22,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:22,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:22,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:22,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:22,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:22,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:22,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:22,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:22,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:22,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:22,830 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_1c36aded-2ff5-48f6-97b3-18593edd7263/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-25 15:37:22,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:22,848 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 15:37:22,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b095bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:22, skipping insertion in model container [2022-11-25 15:37:22,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:22,850 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 15:37:22,851 INFO L158 Benchmark]: Toolchain (without parser) took 249.44ms. Allocated memory is still 155.2MB. Free memory was 126.8MB in the beginning and 116.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 15:37:22,852 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 155.2MB. Free memory is still 128.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:37:22,852 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.74ms. Allocated memory is still 155.2MB. Free memory was 126.8MB in the beginning and 116.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 15:37:22,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 155.2MB. Free memory is still 128.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.74ms. Allocated memory is still 155.2MB. Free memory was 126.8MB in the beginning and 116.3MB 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: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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_1c36aded-2ff5-48f6-97b3-18593edd7263/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 cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- 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 15:37:25,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:37:25,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:37:25,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:37:25,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:37:25,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:37:25,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:37:25,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:37:25,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:37:25,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:37:25,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:37:25,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:37:25,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:37:25,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:37:25,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:37:25,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:37:25,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:37:25,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:37:25,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:37:25,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:37:25,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:37:25,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:37:25,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:37:25,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:37:25,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:37:25,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:37:25,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:37:25,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:37:25,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:37:25,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:37:25,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:37:25,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:37:25,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:37:25,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:37:25,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:37:25,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:37:25,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:37:25,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:37:25,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:37:25,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:37:25,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:37:25,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 15:37:25,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:37:25,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:37:25,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:37:25,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:37:25,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:37:25,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:37:25,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:37:25,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:37:25,293 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:37:25,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:37:25,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:37:25,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:37:25,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:37:25,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:37:25,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:37:25,295 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:37:25,296 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:37:25,296 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:37:25,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:37:25,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:37:25,297 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 15:37:25,297 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 15:37:25,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:37:25,298 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:37:25,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:37:25,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:37:25,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:37:25,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:37:25,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:37:25,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:37:25,300 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 15:37:25,301 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 15:37:25,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:37:25,301 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:37:25,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:37:25,302 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 15:37:25,302 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_1c36aded-2ff5-48f6-97b3-18593edd7263/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2022-11-25 15:37:25,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:37:25,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:37:25,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:37:25,652 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:37:25,653 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:37:25,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-25 15:37:28,819 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:37:29,018 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:37:29,019 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2022-11-25 15:37:29,026 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data/724021664/c8b38b60b8544bfea3645f1d65191ff5/FLAG25895f357 [2022-11-25 15:37:29,047 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/data/724021664/c8b38b60b8544bfea3645f1d65191ff5 [2022-11-25 15:37:29,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:37:29,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:37:29,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:29,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:37:29,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:37:29,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee88399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29, skipping insertion in model container [2022-11-25 15:37:29,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:37:29,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:37:29,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,302 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,302 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,307 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,322 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_1c36aded-2ff5-48f6-97b3-18593edd7263/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-25 15:37:29,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:29,352 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 15:37:29,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:37:29,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,408 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,415 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,416 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,422 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,429 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_1c36aded-2ff5-48f6-97b3-18593edd7263/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-25 15:37:29,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:29,450 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:37:29,483 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,485 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,493 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:37:29,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:37:29,513 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_1c36aded-2ff5-48f6-97b3-18593edd7263/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-11-25 15:37:29,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:37:29,544 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:37:29,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29 WrapperNode [2022-11-25 15:37:29,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:37:29,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:37:29,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:37:29,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:37:29,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,630 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-11-25 15:37:29,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:37:29,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:37:29,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:37:29,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:37:29,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,693 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:37:29,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:37:29,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:37:29,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:37:29,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (1/1) ... [2022-11-25 15:37:29,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:37:29,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:29,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:37:29,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:37:29,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:37:29,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 15:37:29,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:37:29,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 15:37:29,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:37:29,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:37:29,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:37:29,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:37:29,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:37:29,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:37:29,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:37:29,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:37:29,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:37:29,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:37:29,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 15:37:29,819 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 15:37:29,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:37:29,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:37:30,830 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:37:30,970 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:37:30,970 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 15:37:30,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:37:30 BoogieIcfgContainer [2022-11-25 15:37:30,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:37:30,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:37:30,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:37:30,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:37:30,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:37:29" (1/3) ... [2022-11-25 15:37:30,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eac13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:37:30, skipping insertion in model container [2022-11-25 15:37:30,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:37:29" (2/3) ... [2022-11-25 15:37:30,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eac13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:37:30, skipping insertion in model container [2022-11-25 15:37:30,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:37:30" (3/3) ... [2022-11-25 15:37:30,987 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2022-11-25 15:37:31,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:37:31,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-25 15:37:31,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:37:31,115 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:37:31,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-11-25 15:37:31,235 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-11-25 15:37:31,235 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:37:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-25 15:37:31,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 212 transitions, 440 flow [2022-11-25 15:37:31,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 205 transitions, 422 flow [2022-11-25 15:37:31,252 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:37:31,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 205 transitions, 422 flow [2022-11-25 15:37:31,272 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 205 transitions, 422 flow [2022-11-25 15:37:31,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 205 transitions, 422 flow [2022-11-25 15:37:31,375 INFO L130 PetriNetUnfolder]: 15/205 cut-off events. [2022-11-25 15:37:31,378 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:37:31,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 15/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 212 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-25 15:37:31,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-11-25 15:38:04,495 INFO L134 LiptonReduction]: Checked pairs total: 3006 [2022-11-25 15:38:04,495 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-25 15:38:04,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:38:04,519 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;@23e9d0fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:38:04,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-25 15:38:04,523 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 15:38:04,524 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:38:04,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:04,525 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:38:04,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash 28050, now seen corresponding path program 1 times [2022-11-25 15:38:04,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:04,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222691553] [2022-11-25 15:38:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:04,552 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 15:38:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:04,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:04,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:04,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:38:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:04,935 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:38:04,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:38:04,981 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 15:38:04,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:04,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:04,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222691553] [2022-11-25 15:38:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222691553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:04,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:04,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:38:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106516198] [2022-11-25 15:38:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:05,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 15:38:05,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:05,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:05,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 15:38:05,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:05,890 INFO L130 PetriNetUnfolder]: 569/872 cut-off events. [2022-11-25 15:38:05,891 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 15:38:05,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1771 conditions, 872 events. 569/872 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4036 event pairs, 348 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 1609. Up to 859 conditions per place. [2022-11-25 15:38:05,899 INFO L137 encePairwiseOnDemand]: 432/444 looper letters, 46 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-11-25 15:38:05,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 214 flow [2022-11-25 15:38:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-11-25 15:38:05,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-11-25 15:38:05,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-11-25 15:38:05,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-11-25 15:38:05,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:05,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-11-25 15:38:05,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:05,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:05,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:05,936 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 3 states and 592 transitions. [2022-11-25 15:38:05,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 214 flow [2022-11-25 15:38:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:38:05,943 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 130 flow [2022-11-25 15:38:05,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2022-11-25 15:38:05,948 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-25 15:38:05,948 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 130 flow [2022-11-25 15:38:05,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:05,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:05,949 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 15:38:05,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:06,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:06,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 28049, now seen corresponding path program 1 times [2022-11-25 15:38:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537851071] [2022-11-25 15:38:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:06,164 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 15:38:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:06,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:06,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:38:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:06,307 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:38:06,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:38:06,340 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 15:38:06,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:06,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537851071] [2022-11-25 15:38:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537851071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:06,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:06,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:38:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605742537] [2022-11-25 15:38:06,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:06,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:06,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 15:38:06,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:06,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:06,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 15:38:06,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:06,906 INFO L130 PetriNetUnfolder]: 569/866 cut-off events. [2022-11-25 15:38:06,906 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:38:06,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757 conditions, 866 events. 569/866 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 4018 event pairs, 348 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 1726. Up to 859 conditions per place. [2022-11-25 15:38:06,912 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 42 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 15:38:06,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 210 flow [2022-11-25 15:38:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-25 15:38:06,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43318318318318316 [2022-11-25 15:38:06,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-25 15:38:06,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-25 15:38:06,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:06,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-25 15:38:06,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:06,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:06,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:06,922 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 130 flow. Second operand 3 states and 577 transitions. [2022-11-25 15:38:06,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 210 flow [2022-11-25 15:38:06,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:06,924 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 118 flow [2022-11-25 15:38:06,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-25 15:38:06,925 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-11-25 15:38:06,925 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 118 flow [2022-11-25 15:38:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:06,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:06,926 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:38:06,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:07,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:07,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 876505, now seen corresponding path program 1 times [2022-11-25 15:38:07,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:07,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347710232] [2022-11-25 15:38:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:07,149 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 15:38:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:07,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:07,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:07,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 15:38:07,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:07,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 15:38:07,292 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 15:38:07,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:07,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:07,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347710232] [2022-11-25 15:38:07,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347710232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:07,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:07,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:38:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652934399] [2022-11-25 15:38:07,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:07,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:07,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:07,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 15:38:07,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:07,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:07,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 15:38:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:07,872 INFO L130 PetriNetUnfolder]: 569/864 cut-off events. [2022-11-25 15:38:07,872 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:38:07,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 864 events. 569/864 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 3982 event pairs, 348 based on Foata normal form. 2/277 useless extension candidates. Maximal degree in co-relation 1742. Up to 853 conditions per place. [2022-11-25 15:38:07,877 INFO L137 encePairwiseOnDemand]: 442/444 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-25 15:38:07,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 200 flow [2022-11-25 15:38:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 574 transitions. [2022-11-25 15:38:07,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43093093093093093 [2022-11-25 15:38:07,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 574 transitions. [2022-11-25 15:38:07,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 574 transitions. [2022-11-25 15:38:07,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:07,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 574 transitions. [2022-11-25 15:38:07,882 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 15:38:07,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:07,886 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:07,886 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 118 flow. Second operand 3 states and 574 transitions. [2022-11-25 15:38:07,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 200 flow [2022-11-25 15:38:07,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:07,888 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 119 flow [2022-11-25 15:38:07,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2022-11-25 15:38:07,889 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2022-11-25 15:38:07,889 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 119 flow [2022-11-25 15:38:07,890 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 15:38:07,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:07,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:38:07,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:08,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:08,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:08,102 INFO L85 PathProgramCache]: Analyzing trace with hash 875745, now seen corresponding path program 1 times [2022-11-25 15:38:08,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:08,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684049997] [2022-11-25 15:38:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:08,103 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 15:38:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:08,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:08,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:08,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 15:38:08,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:08,251 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:38:08,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:38:08,319 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 15:38:08,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:08,571 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 15:38:08,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:08,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684049997] [2022-11-25 15:38:08,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684049997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:08,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:08,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 15:38:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140987264] [2022-11-25 15:38:08,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:08,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:38:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:38:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:38:10,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 15:38:10,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:10,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:10,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 15:38:10,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:12,119 INFO L130 PetriNetUnfolder]: 1144/1734 cut-off events. [2022-11-25 15:38:12,121 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:38:12,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 1734 events. 1144/1734 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 9165 event pairs, 696 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 3510. Up to 856 conditions per place. [2022-11-25 15:38:12,136 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 71 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2022-11-25 15:38:12,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 441 flow [2022-11-25 15:38:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:38:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:38:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1104 transitions. [2022-11-25 15:38:12,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4144144144144144 [2022-11-25 15:38:12,141 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1104 transitions. [2022-11-25 15:38:12,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1104 transitions. [2022-11-25 15:38:12,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:12,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1104 transitions. [2022-11-25 15:38:12,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,176 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,177 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 119 flow. Second operand 6 states and 1104 transitions. [2022-11-25 15:38:12,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 441 flow [2022-11-25 15:38:12,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 91 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:12,182 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 277 flow [2022-11-25 15:38:12,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2022-11-25 15:38:12,185 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2022-11-25 15:38:12,185 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 277 flow [2022-11-25 15:38:12,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:12,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:12,186 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:38:12,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:12,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:12,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash 27170950, now seen corresponding path program 1 times [2022-11-25 15:38:12,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:12,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706873335] [2022-11-25 15:38:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:12,397 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 15:38:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:12,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:12,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:38:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:12,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:12,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:12,584 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:38:12,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 15:38:12,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 15:38:12,707 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:38:12,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-25 15:38:12,838 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 15:38:12,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:13,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706873335] [2022-11-25 15:38:13,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706873335] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:13,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:38:13,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-25 15:38:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860815549] [2022-11-25 15:38:13,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:13,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:13,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:38:14,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 15:38:14,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:14,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:14,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 15:38:14,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:15,206 INFO L130 PetriNetUnfolder]: 860/1338 cut-off events. [2022-11-25 15:38:15,207 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 15:38:15,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2773 conditions, 1338 events. 860/1338 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 6894 event pairs, 522 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 2760. Up to 1312 conditions per place. [2022-11-25 15:38:15,215 INFO L137 encePairwiseOnDemand]: 439/444 looper letters, 46 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2022-11-25 15:38:15,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 357 flow [2022-11-25 15:38:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:38:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:38:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2022-11-25 15:38:15,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3963963963963964 [2022-11-25 15:38:15,220 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2022-11-25 15:38:15,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2022-11-25 15:38:15,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:15,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2022-11-25 15:38:15,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,228 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 277 flow. Second operand 5 states and 880 transitions. [2022-11-25 15:38:15,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 357 flow [2022-11-25 15:38:15,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 342 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:15,232 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 250 flow [2022-11-25 15:38:15,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2022-11-25 15:38:15,233 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 15:38:15,233 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 250 flow [2022-11-25 15:38:15,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.8) internal successors, (844), 5 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:15,234 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:38:15,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:15,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:15,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash 27170951, now seen corresponding path program 1 times [2022-11-25 15:38:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:15,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564649994] [2022-11-25 15:38:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:15,458 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 15:38:15,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:15,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:15,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:15,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:38:15,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:15,706 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 15:38:15,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 15:38:15,767 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 15:38:15,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 15:38:15,798 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 15:38:15,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:15,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:15,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564649994] [2022-11-25 15:38:15,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564649994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:15,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:15,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:38:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810850680] [2022-11-25 15:38:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:15,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:15,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:15,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:15,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 444 [2022-11-25 15:38:15,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:15,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:15,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 444 [2022-11-25 15:38:15,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:16,354 INFO L130 PetriNetUnfolder]: 576/942 cut-off events. [2022-11-25 15:38:16,355 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 15:38:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 942 events. 576/942 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 4748 event pairs, 348 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 1955. Up to 928 conditions per place. [2022-11-25 15:38:16,361 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 48 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-11-25 15:38:16,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 324 flow [2022-11-25 15:38:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2022-11-25 15:38:16,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2022-11-25 15:38:16,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2022-11-25 15:38:16,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2022-11-25 15:38:16,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:16,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2022-11-25 15:38:16,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,369 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 250 flow. Second operand 3 states and 580 transitions. [2022-11-25 15:38:16,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 324 flow [2022-11-25 15:38:16,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 315 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:16,372 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 219 flow [2022-11-25 15:38:16,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-11-25 15:38:16,373 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-11-25 15:38:16,373 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 219 flow [2022-11-25 15:38:16,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:16,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:16,374 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 15:38:16,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:16,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:16,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash 325667154, now seen corresponding path program 2 times [2022-11-25 15:38:16,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:16,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045736281] [2022-11-25 15:38:16,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:38:16,597 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 15:38:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:16,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:16,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:16,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:38:16,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:38:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:16,798 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:38:16,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:38:16,974 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 15:38:16,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:17,769 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 15:38:17,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045736281] [2022-11-25 15:38:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045736281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:17,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:17,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:38:17,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049351436] [2022-11-25 15:38:17,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:38:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:38:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:38:22,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 15:38:22,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 219 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:22,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:22,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 15:38:22,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:27,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:38:29,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:38:31,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:38:34,009 INFO L130 PetriNetUnfolder]: 1717/2800 cut-off events. [2022-11-25 15:38:34,009 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-25 15:38:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5755 conditions, 2800 events. 1717/2800 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 16899 event pairs, 1044 based on Foata normal form. 9/1170 useless extension candidates. Maximal degree in co-relation 5741. Up to 456 conditions per place. [2022-11-25 15:38:34,026 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 178 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2022-11-25 15:38:34,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 209 transitions, 1069 flow [2022-11-25 15:38:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:38:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:38:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2257 transitions. [2022-11-25 15:38:34,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2022-11-25 15:38:34,038 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2257 transitions. [2022-11-25 15:38:34,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2257 transitions. [2022-11-25 15:38:34,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:34,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2257 transitions. [2022-11-25 15:38:34,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.08333333333334) internal successors, (2257), 12 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states 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 15:38:34,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 444.0) internal successors, (5772), 13 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states 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 15:38:34,055 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 444.0) internal successors, (5772), 13 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states 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 15:38:34,055 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 219 flow. Second operand 12 states and 2257 transitions. [2022-11-25 15:38:34,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 209 transitions, 1069 flow [2022-11-25 15:38:34,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 209 transitions, 1068 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:34,061 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 454 flow [2022-11-25 15:38:34,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=454, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2022-11-25 15:38:34,062 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2022-11-25 15:38:34,062 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 454 flow [2022-11-25 15:38:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:34,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:34,064 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:38:34,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:34,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash 341498121, now seen corresponding path program 1 times [2022-11-25 15:38:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:34,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648562790] [2022-11-25 15:38:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:34,278 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 15:38:34,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:34,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:34,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:38:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:34,473 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 15:38:34,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 15:38:34,508 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 15:38:34,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 15:38:34,524 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 15:38:34,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:34,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:34,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648562790] [2022-11-25 15:38:34,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648562790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:34,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:34,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:38:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492229524] [2022-11-25 15:38:34,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:38:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:38:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:38:34,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 444 [2022-11-25 15:38:34,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:34,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:34,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 444 [2022-11-25 15:38:34,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:35,229 INFO L130 PetriNetUnfolder]: 1597/2584 cut-off events. [2022-11-25 15:38:35,229 INFO L131 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2022-11-25 15:38:35,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5393 conditions, 2584 events. 1597/2584 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 15342 event pairs, 960 based on Foata normal form. 0/1119 useless extension candidates. Maximal degree in co-relation 5371. Up to 2542 conditions per place. [2022-11-25 15:38:35,245 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 63 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2022-11-25 15:38:35,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 578 flow [2022-11-25 15:38:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:38:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:38:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-11-25 15:38:35,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4294294294294294 [2022-11-25 15:38:35,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-11-25 15:38:35,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-11-25 15:38:35,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:35,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-11-25 15:38:35,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:35,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:35,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:35,280 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 454 flow. Second operand 3 states and 572 transitions. [2022-11-25 15:38:35,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 578 flow [2022-11-25 15:38:35,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 518 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-11-25 15:38:35,284 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 392 flow [2022-11-25 15:38:35,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2022-11-25 15:38:35,285 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 14 predicate places. [2022-11-25 15:38:35,285 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 392 flow [2022-11-25 15:38:35,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:35,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:35,286 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:38:35,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:35,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:35,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:35,496 INFO L85 PathProgramCache]: Analyzing trace with hash 341498119, now seen corresponding path program 1 times [2022-11-25 15:38:35,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:35,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574987069] [2022-11-25 15:38:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:35,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:38:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:35,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:35,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 15:38:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:35,720 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:38:35,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 15:38:35,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 15:38:35,778 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-25 15:38:35,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 15:38:35,954 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 15:38:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:36,415 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 15:38:36,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:36,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574987069] [2022-11-25 15:38:36,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574987069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:36,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:36,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-11-25 15:38:36,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516604078] [2022-11-25 15:38:36,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:36,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:38:36,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:38:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:38:37,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 444 [2022-11-25 15:38:37,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 392 flow. Second operand has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:37,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:37,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 444 [2022-11-25 15:38:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:40,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 15:38:41,486 INFO L130 PetriNetUnfolder]: 1477/2368 cut-off events. [2022-11-25 15:38:41,487 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-25 15:38:41,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4927 conditions, 2368 events. 1477/2368 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 13702 event pairs, 876 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 4904. Up to 1919 conditions per place. [2022-11-25 15:38:41,500 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 70 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2022-11-25 15:38:41,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 622 flow [2022-11-25 15:38:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:38:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:38:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1394 transitions. [2022-11-25 15:38:41,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39245495495495497 [2022-11-25 15:38:41,517 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1394 transitions. [2022-11-25 15:38:41,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1394 transitions. [2022-11-25 15:38:41,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:41,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1394 transitions. [2022-11-25 15:38:41,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.25) internal successors, (1394), 8 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states 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 15:38:41,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:41,537 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:41,537 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 392 flow. Second operand 8 states and 1394 transitions. [2022-11-25 15:38:41,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 622 flow [2022-11-25 15:38:41,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:38:41,542 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 434 flow [2022-11-25 15:38:41,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=434, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-11-25 15:38:41,543 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2022-11-25 15:38:41,544 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 434 flow [2022-11-25 15:38:41,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 167.33333333333334) internal successors, (1506), 9 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:41,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:41,545 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:38:41,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:41,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:41,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:41,756 INFO L85 PathProgramCache]: Analyzing trace with hash 341498028, now seen corresponding path program 1 times [2022-11-25 15:38:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:41,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117839783] [2022-11-25 15:38:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:41,757 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 15:38:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:41,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:41,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:38:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:41,921 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 15:38:41,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:41,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117839783] [2022-11-25 15:38:41,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117839783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:41,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:41,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:38:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003907813] [2022-11-25 15:38:41,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:41,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:38:41,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:38:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:38:42,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 444 [2022-11-25 15:38:42,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:42,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:42,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 444 [2022-11-25 15:38:42,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:43,391 INFO L130 PetriNetUnfolder]: 2923/4534 cut-off events. [2022-11-25 15:38:43,392 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2022-11-25 15:38:43,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9340 conditions, 4534 events. 2923/4534 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 28390 event pairs, 774 based on Foata normal form. 0/2074 useless extension candidates. Maximal degree in co-relation 9315. Up to 2689 conditions per place. [2022-11-25 15:38:43,422 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 75 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2022-11-25 15:38:43,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 647 flow [2022-11-25 15:38:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 758 transitions. [2022-11-25 15:38:43,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42680180180180183 [2022-11-25 15:38:43,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 758 transitions. [2022-11-25 15:38:43,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 758 transitions. [2022-11-25 15:38:43,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:43,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 758 transitions. [2022-11-25 15:38:43,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.5) internal successors, (758), 4 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:43,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:43,434 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:43,434 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 434 flow. Second operand 4 states and 758 transitions. [2022-11-25 15:38:43,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 647 flow [2022-11-25 15:38:43,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 600 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-25 15:38:43,439 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 425 flow [2022-11-25 15:38:43,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=425, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2022-11-25 15:38:43,440 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2022-11-25 15:38:43,440 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 425 flow [2022-11-25 15:38:43,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:43,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:43,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:38:43,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:43,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash 341498134, now seen corresponding path program 1 times [2022-11-25 15:38:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:43,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668767199] [2022-11-25 15:38:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:43,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:38:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:43,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:43,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:38:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:43,826 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 15:38:43,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:43,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668767199] [2022-11-25 15:38:43,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668767199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:43,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:43,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:38:43,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258848262] [2022-11-25 15:38:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:43,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:43,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:43,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 444 [2022-11-25 15:38:43,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:43,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:43,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 444 [2022-11-25 15:38:43,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:45,191 INFO L130 PetriNetUnfolder]: 3278/5324 cut-off events. [2022-11-25 15:38:45,191 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2022-11-25 15:38:45,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11700 conditions, 5324 events. 3278/5324 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 35796 event pairs, 2064 based on Foata normal form. 72/3008 useless extension candidates. Maximal degree in co-relation 11674. Up to 4497 conditions per place. [2022-11-25 15:38:45,216 INFO L137 encePairwiseOnDemand]: 433/444 looper letters, 92 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2022-11-25 15:38:45,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 801 flow [2022-11-25 15:38:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 770 transitions. [2022-11-25 15:38:45,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43355855855855857 [2022-11-25 15:38:45,219 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 770 transitions. [2022-11-25 15:38:45,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 770 transitions. [2022-11-25 15:38:45,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:45,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 770 transitions. [2022-11-25 15:38:45,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:45,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:45,226 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:45,226 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 425 flow. Second operand 4 states and 770 transitions. [2022-11-25 15:38:45,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 801 flow [2022-11-25 15:38:45,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 784 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:45,231 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 438 flow [2022-11-25 15:38:45,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2022-11-25 15:38:45,232 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2022-11-25 15:38:45,233 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 438 flow [2022-11-25 15:38:45,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:45,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:45,233 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:38:45,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:45,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:45,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash 341498027, now seen corresponding path program 1 times [2022-11-25 15:38:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:45,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459632483] [2022-11-25 15:38:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:45,446 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 15:38:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:45,448 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:45,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:45,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:38:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 15:38:45,573 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 15:38:45,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:38:45,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:45,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459632483] [2022-11-25 15:38:45,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459632483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:45,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:45,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:38:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806723108] [2022-11-25 15:38:45,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:38:45,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:38:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:38:45,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 15:38:45,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:45,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:45,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 15:38:45,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:46,548 INFO L130 PetriNetUnfolder]: 2690/4370 cut-off events. [2022-11-25 15:38:46,548 INFO L131 PetriNetUnfolder]: For 847/865 co-relation queries the response was YES. [2022-11-25 15:38:46,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11289 conditions, 4370 events. 2690/4370 cut-off events. For 847/865 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 28555 event pairs, 1650 based on Foata normal form. 0/3188 useless extension candidates. Maximal degree in co-relation 11262. Up to 4280 conditions per place. [2022-11-25 15:38:46,576 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 56 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2022-11-25 15:38:46,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 558 flow [2022-11-25 15:38:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:38:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:38:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 711 transitions. [2022-11-25 15:38:46,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40033783783783783 [2022-11-25 15:38:46,580 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 711 transitions. [2022-11-25 15:38:46,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 711 transitions. [2022-11-25 15:38:46,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:46,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 711 transitions. [2022-11-25 15:38:46,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:46,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:46,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:46,586 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 438 flow. Second operand 4 states and 711 transitions. [2022-11-25 15:38:46,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 558 flow [2022-11-25 15:38:46,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 553 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:38:46,591 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 441 flow [2022-11-25 15:38:46,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2022-11-25 15:38:46,592 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2022-11-25 15:38:46,592 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 441 flow [2022-11-25 15:38:46,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:46,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:46,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:46,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:46,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:46,806 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:38:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1521584357, now seen corresponding path program 1 times [2022-11-25 15:38:46,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:38:46,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462634291] [2022-11-25 15:38:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:38:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:38:46,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:38:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:38:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:47,085 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:38:47,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:38:47,155 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:38:47,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:38:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:47,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:38:47,334 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:38:47,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:38:47,397 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 15:38:47,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:54,869 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 15:38:54,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:38:54,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462634291] [2022-11-25 15:38:54,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462634291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:54,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:54,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 15:38:54,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759428816] [2022-11-25 15:38:54,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:54,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:38:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:38:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:38:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:39:04,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:39:10,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 444 [2022-11-25 15:39:10,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:10,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:10,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 444 [2022-11-25 15:39:10,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:21,475 WARN L233 SmtUtils]: Spent 11.22s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:39:22,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:39:32,035 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:39:33,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:39:45,731 INFO L130 PetriNetUnfolder]: 6070/9700 cut-off events. [2022-11-25 15:39:45,731 INFO L131 PetriNetUnfolder]: For 2077/2077 co-relation queries the response was YES. [2022-11-25 15:39:45,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24968 conditions, 9700 events. 6070/9700 cut-off events. For 2077/2077 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 68419 event pairs, 3600 based on Foata normal form. 0/7593 useless extension candidates. Maximal degree in co-relation 24941. Up to 3721 conditions per place. [2022-11-25 15:39:45,820 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 118 selfloop transitions, 36 changer transitions 0/155 dead transitions. [2022-11-25 15:39:45,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 155 transitions, 1250 flow [2022-11-25 15:39:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:39:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:39:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2506 transitions. [2022-11-25 15:39:45,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3762762762762763 [2022-11-25 15:39:45,833 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2506 transitions. [2022-11-25 15:39:45,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2506 transitions. [2022-11-25 15:39:45,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:45,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2506 transitions. [2022-11-25 15:39:45,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.06666666666666) internal successors, (2506), 15 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:45,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:45,857 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 444.0) internal successors, (7104), 16 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:45,857 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 441 flow. Second operand 15 states and 2506 transitions. [2022-11-25 15:39:45,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 155 transitions, 1250 flow [2022-11-25 15:39:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 155 transitions, 1229 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:39:45,871 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 748 flow [2022-11-25 15:39:45,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=748, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2022-11-25 15:39:45,873 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2022-11-25 15:39:45,874 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 748 flow [2022-11-25 15:39:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 161.75) internal successors, (1294), 8 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:45,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:45,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:45,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:46,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:39:46,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1521584356, now seen corresponding path program 1 times [2022-11-25 15:39:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:39:46,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893471756] [2022-11-25 15:39:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:46,091 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 15:39:46,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:39:46,093 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:46,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:39:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:46,385 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:39:46,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:39:46,449 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 15:39:46,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 15:39:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:39:46,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:39:46,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:39:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893471756] [2022-11-25 15:39:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893471756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:39:46,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:39:46,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:39:46,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567251103] [2022-11-25 15:39:46,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:39:46,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:39:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:39:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:39:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:39:46,927 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 444 [2022-11-25 15:39:46,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 748 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:46,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:46,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 444 [2022-11-25 15:39:46,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:48,121 INFO L130 PetriNetUnfolder]: 4144/6862 cut-off events. [2022-11-25 15:39:48,122 INFO L131 PetriNetUnfolder]: For 3524/3524 co-relation queries the response was YES. [2022-11-25 15:39:48,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18295 conditions, 6862 events. 4144/6862 cut-off events. For 3524/3524 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 47523 event pairs, 2448 based on Foata normal form. 294/6742 useless extension candidates. Maximal degree in co-relation 18262. Up to 6777 conditions per place. [2022-11-25 15:39:48,160 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 68 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2022-11-25 15:39:48,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 900 flow [2022-11-25 15:39:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:39:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:39:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2022-11-25 15:39:48,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4127252252252252 [2022-11-25 15:39:48,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2022-11-25 15:39:48,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2022-11-25 15:39:48,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:48,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2022-11-25 15:39:48,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:48,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:48,171 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:48,171 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 748 flow. Second operand 4 states and 733 transitions. [2022-11-25 15:39:48,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 81 transitions, 900 flow [2022-11-25 15:39:48,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 880 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 15:39:48,185 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 744 flow [2022-11-25 15:39:48,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2022-11-25 15:39:48,186 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2022-11-25 15:39:48,186 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 744 flow [2022-11-25 15:39:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:48,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:48,187 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:48,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:48,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:48,401 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:39:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1762112242, now seen corresponding path program 1 times [2022-11-25 15:39:48,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:39:48,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256756661] [2022-11-25 15:39:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:48,402 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 15:39:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:39:48,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:48,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 15:39:48,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:48,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 15:39:48,839 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 15:39:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:49,847 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 15:39:49,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:39:49,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256756661] [2022-11-25 15:39:49,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256756661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:49,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:39:49,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 15:39:49,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496524718] [2022-11-25 15:39:49,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:49,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:39:49,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:39:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:39:49,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:39:52,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 15:39:52,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 744 flow. Second operand has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:52,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:52,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 15:39:52,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:56,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:39:59,187 INFO L130 PetriNetUnfolder]: 8548/13660 cut-off events. [2022-11-25 15:39:59,187 INFO L131 PetriNetUnfolder]: For 6701/6773 co-relation queries the response was YES. [2022-11-25 15:39:59,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36453 conditions, 13660 events. 8548/13660 cut-off events. For 6701/6773 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 99941 event pairs, 714 based on Foata normal form. 576/13426 useless extension candidates. Maximal degree in co-relation 36419. Up to 4105 conditions per place. [2022-11-25 15:39:59,274 INFO L137 encePairwiseOnDemand]: 435/444 looper letters, 93 selfloop transitions, 42 changer transitions 0/136 dead transitions. [2022-11-25 15:39:59,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 136 transitions, 1210 flow [2022-11-25 15:39:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:39:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:39:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1432 transitions. [2022-11-25 15:39:59,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40315315315315314 [2022-11-25 15:39:59,281 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1432 transitions. [2022-11-25 15:39:59,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1432 transitions. [2022-11-25 15:39:59,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:59,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1432 transitions. [2022-11-25 15:39:59,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:59,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:59,293 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 444.0) internal successors, (3996), 9 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:59,294 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 744 flow. Second operand 8 states and 1432 transitions. [2022-11-25 15:39:59,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 136 transitions, 1210 flow [2022-11-25 15:39:59,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 136 transitions, 1197 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:39:59,315 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 899 flow [2022-11-25 15:39:59,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2022-11-25 15:39:59,316 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 47 predicate places. [2022-11-25 15:39:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 899 flow [2022-11-25 15:39:59,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.6) internal successors, (1696), 10 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:59,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:59,317 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:59,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:59,531 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:39:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 432256953, now seen corresponding path program 1 times [2022-11-25 15:39:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:39:59,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117419707] [2022-11-25 15:39:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:59,532 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 15:39:59,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:39:59,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:59,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:39:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:59,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:39:59,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:39:59,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:59,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-25 15:40:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:40:00,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:40:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117419707] [2022-11-25 15:40:00,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117419707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:40:00,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:40:00,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 15:40:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868745429] [2022-11-25 15:40:00,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:40:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:40:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:40:00,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:40:03,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 444 [2022-11-25 15:40:03,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 899 flow. Second operand has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:03,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:03,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 444 [2022-11-25 15:40:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:07,785 INFO L130 PetriNetUnfolder]: 8044/13072 cut-off events. [2022-11-25 15:40:07,785 INFO L131 PetriNetUnfolder]: For 12855/12927 co-relation queries the response was YES. [2022-11-25 15:40:07,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40559 conditions, 13072 events. 8044/13072 cut-off events. For 12855/12927 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 96777 event pairs, 636 based on Foata normal form. 468/13306 useless extension candidates. Maximal degree in co-relation 40520. Up to 3541 conditions per place. [2022-11-25 15:40:07,879 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 118 selfloop transitions, 36 changer transitions 0/155 dead transitions. [2022-11-25 15:40:07,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1450 flow [2022-11-25 15:40:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:40:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:40:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1816 transitions. [2022-11-25 15:40:07,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.409009009009009 [2022-11-25 15:40:07,884 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1816 transitions. [2022-11-25 15:40:07,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1816 transitions. [2022-11-25 15:40:07,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:07,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1816 transitions. [2022-11-25 15:40:07,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.6) internal successors, (1816), 10 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 444.0) internal successors, (4884), 11 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,899 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 444.0) internal successors, (4884), 11 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,899 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 899 flow. Second operand 10 states and 1816 transitions. [2022-11-25 15:40:07,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1450 flow [2022-11-25 15:40:07,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 1375 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 15:40:07,978 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 936 flow [2022-11-25 15:40:07,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=936, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2022-11-25 15:40:07,979 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2022-11-25 15:40:07,979 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 936 flow [2022-11-25 15:40:07,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 172.66666666666666) internal successors, (2072), 12 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:07,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:07,981 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:08,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:08,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:08,202 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:40:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1282397398, now seen corresponding path program 2 times [2022-11-25 15:40:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:40:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060825477] [2022-11-25 15:40:08,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:40:08,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:40:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:40:08,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:08,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:08,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:40:08,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:40:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:08,484 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:40:08,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:40:08,603 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 15:40:08,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 15:40:08,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:40:08,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 15:40:08,791 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:40:08,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 15:40:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:40:08,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:40:08,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:40:08,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060825477] [2022-11-25 15:40:08,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060825477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:40:08,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:40:08,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:40:08,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991196058] [2022-11-25 15:40:08,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:40:08,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:40:08,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:40:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:40:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:40:09,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 444 [2022-11-25 15:40:09,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:09,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:09,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 444 [2022-11-25 15:40:09,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:11,670 INFO L130 PetriNetUnfolder]: 6694/11176 cut-off events. [2022-11-25 15:40:11,670 INFO L131 PetriNetUnfolder]: For 12855/12903 co-relation queries the response was YES. [2022-11-25 15:40:11,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33799 conditions, 11176 events. 6694/11176 cut-off events. For 12855/12903 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 82860 event pairs, 4104 based on Foata normal form. 816/11872 useless extension candidates. Maximal degree in co-relation 33759. Up to 11091 conditions per place. [2022-11-25 15:40:11,740 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 74 selfloop transitions, 12 changer transitions 0/87 dead transitions. [2022-11-25 15:40:11,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 87 transitions, 1038 flow [2022-11-25 15:40:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:40:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:40:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 714 transitions. [2022-11-25 15:40:11,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40202702702702703 [2022-11-25 15:40:11,744 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 714 transitions. [2022-11-25 15:40:11,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 714 transitions. [2022-11-25 15:40:11,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:11,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 714 transitions. [2022-11-25 15:40:11,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:11,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:11,750 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:11,751 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 936 flow. Second operand 4 states and 714 transitions. [2022-11-25 15:40:11,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 87 transitions, 1038 flow [2022-11-25 15:40:11,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 965 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-25 15:40:11,801 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 817 flow [2022-11-25 15:40:11,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=817, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2022-11-25 15:40:11,802 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2022-11-25 15:40:11,803 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 817 flow [2022-11-25 15:40:11,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:11,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:11,803 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-11-25 15:40:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:12,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:12,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:40:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash -5630497, now seen corresponding path program 1 times [2022-11-25 15:40:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:40:12,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379629592] [2022-11-25 15:40:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:12,025 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 15:40:12,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:40:12,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:40:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:12,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 15:40:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:12,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 15:40:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:12,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:15,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:40:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379629592] [2022-11-25 15:40:15,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379629592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:40:15,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:40:15,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-25 15:40:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448599542] [2022-11-25 15:40:15,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:15,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:40:15,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:40:15,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:40:15,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:40:38,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 15:40:38,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 817 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:38,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:38,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 15:40:38,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:44,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:40:46,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:40:47,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:40:49,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:40:51,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:40:53,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:40:55,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:41:10,805 INFO L130 PetriNetUnfolder]: 15602/26032 cut-off events. [2022-11-25 15:41:10,806 INFO L131 PetriNetUnfolder]: For 13108/13114 co-relation queries the response was YES. [2022-11-25 15:41:10,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74256 conditions, 26032 events. 15602/26032 cut-off events. For 13108/13114 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 209615 event pairs, 9576 based on Foata normal form. 36/25628 useless extension candidates. Maximal degree in co-relation 74218. Up to 5545 conditions per place. [2022-11-25 15:41:11,027 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 442 selfloop transitions, 47 changer transitions 0/490 dead transitions. [2022-11-25 15:41:11,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 490 transitions, 4062 flow [2022-11-25 15:41:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:41:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:41:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3365 transitions. [2022-11-25 15:41:11,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42104604604604606 [2022-11-25 15:41:11,036 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3365 transitions. [2022-11-25 15:41:11,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3365 transitions. [2022-11-25 15:41:11,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:41:11,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3365 transitions. [2022-11-25 15:41:11,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.94444444444446) internal successors, (3365), 18 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states 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 15:41:11,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 444.0) internal successors, (8436), 19 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:11,057 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 444.0) internal successors, (8436), 19 states have internal predecessors, (8436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:11,058 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 817 flow. Second operand 18 states and 3365 transitions. [2022-11-25 15:41:11,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 490 transitions, 4062 flow [2022-11-25 15:41:11,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 490 transitions, 4049 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:41:11,227 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 1165 flow [2022-11-25 15:41:11,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1165, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2022-11-25 15:41:11,228 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 70 predicate places. [2022-11-25 15:41:11,229 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 1165 flow [2022-11-25 15:41:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:11,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:41:11,230 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 15:41:11,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:41:11,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:41:11,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:41:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1694781170, now seen corresponding path program 3 times [2022-11-25 15:41:11,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:41:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137462940] [2022-11-25 15:41:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:41:11,446 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 15:41:11,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:41:11,447 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:41:11,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:41:11,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 15:41:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:41:11,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:41:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:41:11,815 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-25 15:41:11,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-25 15:41:12,665 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 15:41:12,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:41:17,020 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 15:41:17,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:41:17,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137462940] [2022-11-25 15:41:17,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137462940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:41:17,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:41:17,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 15:41:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897452770] [2022-11-25 15:41:17,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:41:17,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:41:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:41:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:41:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:41:51,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 444 [2022-11-25 15:41:51,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 1165 flow. Second operand has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:41:51,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:41:51,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 444 [2022-11-25 15:41:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:42:06,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:08,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:10,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:12,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:14,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:16,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:18,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:20,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:22,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:24,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:42:45,676 INFO L130 PetriNetUnfolder]: 15614/26056 cut-off events. [2022-11-25 15:42:45,676 INFO L131 PetriNetUnfolder]: For 13760/13760 co-relation queries the response was YES. [2022-11-25 15:42:45,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74681 conditions, 26056 events. 15614/26056 cut-off events. For 13760/13760 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 209153 event pairs, 9576 based on Foata normal form. 12/25634 useless extension candidates. Maximal degree in co-relation 74633. Up to 5545 conditions per place. [2022-11-25 15:42:45,965 INFO L137 encePairwiseOnDemand]: 438/444 looper letters, 380 selfloop transitions, 74 changer transitions 0/455 dead transitions. [2022-11-25 15:42:45,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 455 transitions, 4195 flow [2022-11-25 15:42:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:42:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:42:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4372 transitions. [2022-11-25 15:42:45,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4102852852852853 [2022-11-25 15:42:45,973 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4372 transitions. [2022-11-25 15:42:45,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4372 transitions. [2022-11-25 15:42:45,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:42:45,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4372 transitions. [2022-11-25 15:42:45,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 182.16666666666666) internal successors, (4372), 24 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 444.0) internal successors, (11100), 25 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,998 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 444.0) internal successors, (11100), 25 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:45,998 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 1165 flow. Second operand 24 states and 4372 transitions. [2022-11-25 15:42:45,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 455 transitions, 4195 flow [2022-11-25 15:42:46,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 455 transitions, 4129 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-25 15:42:46,443 INFO L231 Difference]: Finished difference. Result has 149 places, 132 transitions, 1733 flow [2022-11-25 15:42:46,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1733, PETRI_PLACES=149, PETRI_TRANSITIONS=132} [2022-11-25 15:42:46,444 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 100 predicate places. [2022-11-25 15:42:46,444 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 132 transitions, 1733 flow [2022-11-25 15:42:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 171.0) internal successors, (4104), 24 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:42:46,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:42:46,446 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:42:46,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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)] Forceful destruction successful, exit code 0 [2022-11-25 15:42:46,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:42:46,647 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:42:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:42:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash 294054084, now seen corresponding path program 2 times [2022-11-25 15:42:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:42:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067470355] [2022-11-25 15:42:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:42:46,648 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 15:42:46,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:42:46,649 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:42:46,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:42:46,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:42:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:42:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:42:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:46,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 15:42:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:47,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:42:49,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:42:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067470355] [2022-11-25 15:42:49,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067470355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:42:49,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:42:49,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-11-25 15:42:49,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970299230] [2022-11-25 15:42:49,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:49,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:42:49,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:42:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:42:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:43:06,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 444 [2022-11-25 15:43:06,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 132 transitions, 1733 flow. Second operand has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:06,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:06,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 444 [2022-11-25 15:43:06,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:14,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:43:18,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:43:26,285 INFO L130 PetriNetUnfolder]: 15444/25674 cut-off events. [2022-11-25 15:43:26,285 INFO L131 PetriNetUnfolder]: For 11553/11562 co-relation queries the response was YES. [2022-11-25 15:43:26,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73800 conditions, 25674 events. 15444/25674 cut-off events. For 11553/11562 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 206897 event pairs, 1190 based on Foata normal form. 90/25308 useless extension candidates. Maximal degree in co-relation 73738. Up to 9026 conditions per place. [2022-11-25 15:43:26,625 INFO L137 encePairwiseOnDemand]: 433/444 looper letters, 163 selfloop transitions, 95 changer transitions 0/259 dead transitions. [2022-11-25 15:43:26,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 259 transitions, 2657 flow [2022-11-25 15:43:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:43:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 15:43:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3394 transitions. [2022-11-25 15:43:26,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3822072072072072 [2022-11-25 15:43:26,634 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3394 transitions. [2022-11-25 15:43:26,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3394 transitions. [2022-11-25 15:43:26,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:26,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3394 transitions. [2022-11-25 15:43:26,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 169.7) internal successors, (3394), 20 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:26,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 444.0) internal successors, (9324), 21 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:26,649 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 444.0) internal successors, (9324), 21 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:26,649 INFO L175 Difference]: Start difference. First operand has 149 places, 132 transitions, 1733 flow. Second operand 20 states and 3394 transitions. [2022-11-25 15:43:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 259 transitions, 2657 flow [2022-11-25 15:43:26,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 2514 flow, removed 35 selfloop flow, removed 9 redundant places. [2022-11-25 15:43:26,867 INFO L231 Difference]: Finished difference. Result has 161 places, 146 transitions, 1891 flow [2022-11-25 15:43:26,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1891, PETRI_PLACES=161, PETRI_TRANSITIONS=146} [2022-11-25 15:43:26,868 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2022-11-25 15:43:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 146 transitions, 1891 flow [2022-11-25 15:43:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.55555555555554) internal successors, (2926), 18 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:26,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:26,869 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-11-25 15:43:26,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:27,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:27,070 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:43:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1277528044, now seen corresponding path program 3 times [2022-11-25 15:43:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:43:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290637497] [2022-11-25 15:43:27,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:43:27,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:43:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:43:27,073 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:27,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:27,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:43:27,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 15:43:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:43:27,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-25 15:43:27,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-25 15:43:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 15:43:27,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:43:27,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:43:27,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290637497] [2022-11-25 15:43:27,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290637497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:27,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:27,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:43:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625817741] [2022-11-25 15:43:27,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:27,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:43:27,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:43:27,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:43:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:43:29,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 444 [2022-11-25 15:43:29,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 146 transitions, 1891 flow. Second operand has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:29,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:29,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 444 [2022-11-25 15:43:29,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:36,999 INFO L130 PetriNetUnfolder]: 15351/25795 cut-off events. [2022-11-25 15:43:36,999 INFO L131 PetriNetUnfolder]: For 21604/21604 co-relation queries the response was YES. [2022-11-25 15:43:37,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80649 conditions, 25795 events. 15351/25795 cut-off events. For 21604/21604 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 211076 event pairs, 1214 based on Foata normal form. 378/26173 useless extension candidates. Maximal degree in co-relation 80584. Up to 21790 conditions per place. [2022-11-25 15:43:37,346 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 118 selfloop transitions, 46 changer transitions 0/165 dead transitions. [2022-11-25 15:43:37,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 165 transitions, 2292 flow [2022-11-25 15:43:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:43:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:43:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1054 transitions. [2022-11-25 15:43:37,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39564564564564564 [2022-11-25 15:43:37,349 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1054 transitions. [2022-11-25 15:43:37,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1054 transitions. [2022-11-25 15:43:37,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:37,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1054 transitions. [2022-11-25 15:43:37,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.66666666666666) internal successors, (1054), 6 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:37,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:37,353 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:37,353 INFO L175 Difference]: Start difference. First operand has 161 places, 146 transitions, 1891 flow. Second operand 6 states and 1054 transitions. [2022-11-25 15:43:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 165 transitions, 2292 flow [2022-11-25 15:43:37,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 165 transitions, 2069 flow, removed 23 selfloop flow, removed 11 redundant places. [2022-11-25 15:43:37,679 INFO L231 Difference]: Finished difference. Result has 158 places, 154 transitions, 1853 flow [2022-11-25 15:43:37,680 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1853, PETRI_PLACES=158, PETRI_TRANSITIONS=154} [2022-11-25 15:43:37,680 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2022-11-25 15:43:37,680 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 154 transitions, 1853 flow [2022-11-25 15:43:37,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.66666666666666) internal successors, (1018), 6 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:37,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:37,681 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:37,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:37,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:37,883 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:43:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash 638970780, now seen corresponding path program 1 times [2022-11-25 15:43:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:43:37,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280467487] [2022-11-25 15:43:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:37,885 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 15:43:37,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:43:37,886 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:37,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:38,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:43:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:43:38,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:43:38,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:43:38,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280467487] [2022-11-25 15:43:38,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280467487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:38,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:38,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:43:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124285912] [2022-11-25 15:43:38,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:38,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:43:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:43:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:43:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:43:38,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 444 [2022-11-25 15:43:38,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 154 transitions, 1853 flow. Second operand has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:38,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:38,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 444 [2022-11-25 15:43:38,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:45,508 INFO L130 PetriNetUnfolder]: 16191/28346 cut-off events. [2022-11-25 15:43:45,508 INFO L131 PetriNetUnfolder]: For 32700/32700 co-relation queries the response was YES. [2022-11-25 15:43:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94969 conditions, 28346 events. 16191/28346 cut-off events. For 32700/32700 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 229845 event pairs, 4260 based on Foata normal form. 2400/30746 useless extension candidates. Maximal degree in co-relation 94905. Up to 12744 conditions per place. [2022-11-25 15:43:45,892 INFO L137 encePairwiseOnDemand]: 437/444 looper letters, 137 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2022-11-25 15:43:45,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 199 transitions, 2560 flow [2022-11-25 15:43:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:43:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:43:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 946 transitions. [2022-11-25 15:43:45,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4261261261261261 [2022-11-25 15:43:45,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 946 transitions. [2022-11-25 15:43:45,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 946 transitions. [2022-11-25 15:43:45,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:45,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 946 transitions. [2022-11-25 15:43:45,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:45,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:45,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 444.0) internal successors, (2664), 6 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:45,898 INFO L175 Difference]: Start difference. First operand has 158 places, 154 transitions, 1853 flow. Second operand 5 states and 946 transitions. [2022-11-25 15:43:45,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 199 transitions, 2560 flow [2022-11-25 15:43:46,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 199 transitions, 2558 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 15:43:46,909 INFO L231 Difference]: Finished difference. Result has 165 places, 184 transitions, 2328 flow [2022-11-25 15:43:46,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2328, PETRI_PLACES=165, PETRI_TRANSITIONS=184} [2022-11-25 15:43:46,910 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 116 predicate places. [2022-11-25 15:43:46,910 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 184 transitions, 2328 flow [2022-11-25 15:43:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:46,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:43:46,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:46,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:47,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:47,114 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:43:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1408728636, now seen corresponding path program 2 times [2022-11-25 15:43:47,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:43:47,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969507228] [2022-11-25 15:43:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:43:47,115 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 15:43:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:43:47,116 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:47,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:43:47,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:43:47,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:47,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:43:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:43:47,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:43:47,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:43:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969507228] [2022-11-25 15:43:47,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969507228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:47,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:47,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:43:47,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461071646] [2022-11-25 15:43:47,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:47,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:47,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:43:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:47,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:47,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 444 [2022-11-25 15:43:47,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 184 transitions, 2328 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:47,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:43:47,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 444 [2022-11-25 15:43:47,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:43:58,809 INFO L130 PetriNetUnfolder]: 23188/40380 cut-off events. [2022-11-25 15:43:58,809 INFO L131 PetriNetUnfolder]: For 112457/113921 co-relation queries the response was YES. [2022-11-25 15:43:59,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177413 conditions, 40380 events. 23188/40380 cut-off events. For 112457/113921 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 347468 event pairs, 7793 based on Foata normal form. 722/40620 useless extension candidates. Maximal degree in co-relation 177345. Up to 20128 conditions per place. [2022-11-25 15:43:59,607 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 244 selfloop transitions, 4 changer transitions 2/252 dead transitions. [2022-11-25 15:43:59,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 252 transitions, 3577 flow [2022-11-25 15:43:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:43:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2022-11-25 15:43:59,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4451951951951952 [2022-11-25 15:43:59,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2022-11-25 15:43:59,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2022-11-25 15:43:59,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:43:59,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2022-11-25 15:43:59,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:59,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:59,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:43:59,612 INFO L175 Difference]: Start difference. First operand has 165 places, 184 transitions, 2328 flow. Second operand 3 states and 593 transitions. [2022-11-25 15:43:59,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 252 transitions, 3577 flow [2022-11-25 15:44:01,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 252 transitions, 3569 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 15:44:01,927 INFO L231 Difference]: Finished difference. Result has 168 places, 186 transitions, 2350 flow [2022-11-25 15:44:01,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2350, PETRI_PLACES=168, PETRI_TRANSITIONS=186} [2022-11-25 15:44:01,927 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 119 predicate places. [2022-11-25 15:44:01,928 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 186 transitions, 2350 flow [2022-11-25 15:44:01,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:01,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:44:01,928 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:01,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:44:02,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:44:02,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:44:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash -811140752, now seen corresponding path program 1 times [2022-11-25 15:44:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:44:02,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952483070] [2022-11-25 15:44:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:02,130 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 15:44:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:44:02,131 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:44:02,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:44:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:02,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 15:44:02,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:02,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 15:44:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:44:03,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:44:06,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:44:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952483070] [2022-11-25 15:44:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952483070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:06,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:44:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-25 15:44:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142425136] [2022-11-25 15:44:06,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:06,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:44:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:44:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:44:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:44:20,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 444 [2022-11-25 15:44:20,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 186 transitions, 2350 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:20,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:44:20,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 444 [2022-11-25 15:44:20,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:44:33,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:35,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:40,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:44:43,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:45,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:47,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:49,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:51,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:53,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:44:57,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:00,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:01,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:03,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:05,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:09,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:11,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:16,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:45:32,773 INFO L130 PetriNetUnfolder]: 52917/91014 cut-off events. [2022-11-25 15:45:32,773 INFO L131 PetriNetUnfolder]: For 275415/278358 co-relation queries the response was YES. [2022-11-25 15:45:33,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422152 conditions, 91014 events. 52917/91014 cut-off events. For 275415/278358 co-relation queries the response was YES. Maximal size of possible extension queue 2170. Compared 820546 event pairs, 2628 based on Foata normal form. 6717/97473 useless extension candidates. Maximal degree in co-relation 422081. Up to 25012 conditions per place. [2022-11-25 15:45:34,343 INFO L137 encePairwiseOnDemand]: 436/444 looper letters, 297 selfloop transitions, 134 changer transitions 0/433 dead transitions. [2022-11-25 15:45:34,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 433 transitions, 4975 flow [2022-11-25 15:45:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 15:45:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 15:45:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3881 transitions. [2022-11-25 15:45:34,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3973177723177723 [2022-11-25 15:45:34,351 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3881 transitions. [2022-11-25 15:45:34,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3881 transitions. [2022-11-25 15:45:34,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:45:34,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3881 transitions. [2022-11-25 15:45:34,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 176.4090909090909) internal successors, (3881), 22 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states 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 15:45:34,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 444.0) internal successors, (10212), 23 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states 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 15:45:34,372 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 444.0) internal successors, (10212), 23 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states 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 15:45:34,372 INFO L175 Difference]: Start difference. First operand has 168 places, 186 transitions, 2350 flow. Second operand 22 states and 3881 transitions. [2022-11-25 15:45:34,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 433 transitions, 4975 flow [2022-11-25 15:45:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 433 transitions, 4930 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:45:38,662 INFO L231 Difference]: Finished difference. Result has 195 places, 227 transitions, 3230 flow [2022-11-25 15:45:38,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3230, PETRI_PLACES=195, PETRI_TRANSITIONS=227} [2022-11-25 15:45:38,663 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 146 predicate places. [2022-11-25 15:45:38,663 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 227 transitions, 3230 flow [2022-11-25 15:45:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:38,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:45:38,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:38,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:45:38,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:45:38,864 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-25 15:45:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1770229785, now seen corresponding path program 1 times [2022-11-25 15:45:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:45:38,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347427457] [2022-11-25 15:45:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:38,866 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 15:45:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:45:38,868 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:45:38,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c36aded-2ff5-48f6-97b3-18593edd7263/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 15:45:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:45:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:45:39,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:45:39,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:45:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347427457] [2022-11-25 15:45:39,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347427457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:45:39,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:45:39,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:45:39,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293832525] [2022-11-25 15:45:39,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:45:39,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:45:39,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:45:39,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:45:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:45:39,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 444 [2022-11-25 15:45:39,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 227 transitions, 3230 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 15:45:39,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:45:39,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 444 [2022-11-25 15:45:39,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand