./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:24:04,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:24:04,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:24:04,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:24:04,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:24:04,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:24:04,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:24:04,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:24:04,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:24:04,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:24:04,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:24:04,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:24:04,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:24:04,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:24:04,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:24:04,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:24:04,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:24:04,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:24:04,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:24:04,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:24:04,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:24:04,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:24:04,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:24:04,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:24:04,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:24:04,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:24:04,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:24:04,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:24:04,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:24:04,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:24:04,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:24:04,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:24:04,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:24:04,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:24:04,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:24:04,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:24:04,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:24:04,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:24:04,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:24:04,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:24:04,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:24:04,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:24:04,584 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:24:04,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:24:04,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:24:04,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:24:04,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:24:04,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:24:04,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:24:04,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:24:04,588 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:24:04,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:24:04,589 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:24:04,589 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:24:04,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:24:04,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:24:04,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:24:04,590 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:24:04,591 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:24:04,591 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:24:04,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:24:04,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:24:04,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:24:04,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:24:04,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:24:04,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:24:04,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:24:04,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:04,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:24:04,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:24:04,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:24:04,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:24:04,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:24:04,595 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:24:04,596 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:24:04,596 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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-11-25 17:24:04,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:24:04,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:24:04,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:24:04,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:24:04,946 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:24:04,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-11-25 17:24:07,888 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:24:08,147 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:24:08,148 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-11-25 17:24:08,156 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data/edc9e9ef7/8b47c74583a64a24a78c6bd6f4806d7f/FLAGe750bb841 [2022-11-25 17:24:08,174 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data/edc9e9ef7/8b47c74583a64a24a78c6bd6f4806d7f [2022-11-25 17:24:08,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:24:08,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:24:08,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:08,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:24:08,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:24:08,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:08" (1/1) ... [2022-11-25 17:24:08,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c55ae40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:08, skipping insertion in model container [2022-11-25 17:24:08,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:08" (1/1) ... [2022-11-25 17:24:08,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:24:08,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:08,368 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:08,370 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:08,374 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:08,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:08,377 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:08,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:08,386 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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-11-25 17:24:08,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:08,408 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 17:24:08,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fdabc71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:08, skipping insertion in model container [2022-11-25 17:24:08,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:08,409 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:24:08,411 INFO L158 Benchmark]: Toolchain (without parser) took 230.52ms. Allocated memory is still 148.9MB. Free memory was 119.0MB in the beginning and 108.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:24:08,411 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 117.4MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:24:08,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.05ms. Allocated memory is still 148.9MB. Free memory was 119.0MB in the beginning and 108.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:24:08,413 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 117.4MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.05ms. Allocated memory is still 148.9MB. Free memory was 119.0MB in the beginning and 108.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:24:10,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:24:10,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:24:10,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:24:10,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:24:10,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:24:10,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:24:10,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:24:10,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:24:10,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:24:10,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:24:10,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:24:10,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:24:10,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:24:10,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:24:10,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:24:10,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:24:10,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:24:10,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:24:10,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:24:10,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:24:10,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:24:10,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:24:10,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:24:10,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:24:10,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:24:10,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:24:10,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:24:10,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:24:10,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:24:10,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:24:10,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:24:10,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:24:10,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:24:10,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:24:10,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:24:10,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:24:10,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:24:10,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:24:10,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:24:10,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:24:10,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:24:10,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:24:10,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:24:10,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:24:10,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:24:10,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:24:10,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:24:10,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:24:10,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:24:10,772 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:24:10,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:24:10,773 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:24:10,774 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:24:10,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:24:10,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:24:10,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:24:10,775 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:24:10,775 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:24:10,775 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:24:10,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:24:10,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:24:10,776 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:24:10,777 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:24:10,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:24:10,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:24:10,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:24:10,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:24:10,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:24:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:10,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:24:10,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:24:10,779 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:24:10,779 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:24:10,780 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:24:10,780 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:24:10,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:24:10,781 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:24:10,781 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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-11-25 17:24:11,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:24:11,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:24:11,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:24:11,211 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:24:11,211 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:24:11,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-11-25 17:24:14,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:24:14,638 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:24:14,639 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-11-25 17:24:14,646 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data/11a342a6b/1706b3c307b84491b6cc589e9918f157/FLAG77184b31a [2022-11-25 17:24:14,662 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/data/11a342a6b/1706b3c307b84491b6cc589e9918f157 [2022-11-25 17:24:14,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:24:14,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:24:14,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:14,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:24:14,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:24:14,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:14,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c76b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14, skipping insertion in model container [2022-11-25 17:24:14,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:14,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:24:14,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:14,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,869 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,872 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,873 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,881 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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-11-25 17:24:14,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:14,911 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:24:14,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:14,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,922 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,926 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,930 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-11-25 17:24:14,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:14,947 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:24:14,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:14,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:14,973 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_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-11-25 17:24:14,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:14,994 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:24:14,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14 WrapperNode [2022-11-25 17:24:14,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:14,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:24:14,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:24:14,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:24:15,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,038 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-11-25 17:24:15,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:24:15,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:24:15,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:24:15,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:24:15,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:24:15,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:24:15,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:24:15,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:24:15,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (1/1) ... [2022-11-25 17:24:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:15,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:24:15,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:24:15,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:24:15,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:24:15,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:24:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:24:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:24:15,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:24:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:24:15,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:24:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:24:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:24:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:24:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:24:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:24:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:24:15,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:24:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:24:15,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:24:15,219 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:24:15,349 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:24:15,351 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:24:16,027 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:24:16,159 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:24:16,160 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:24:16,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:24:16 BoogieIcfgContainer [2022-11-25 17:24:16,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:24:16,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:24:16,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:24:16,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:24:16,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:24:14" (1/3) ... [2022-11-25 17:24:16,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa7e650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:24:16, skipping insertion in model container [2022-11-25 17:24:16,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:14" (2/3) ... [2022-11-25 17:24:16,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa7e650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:24:16, skipping insertion in model container [2022-11-25 17:24:16,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:24:16" (3/3) ... [2022-11-25 17:24:16,173 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2022-11-25 17:24:16,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:24:16,195 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-25 17:24:16,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:24:16,326 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:24:16,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-11-25 17:24:16,500 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-11-25 17:24:16,501 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:24:16,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-11-25 17:24:16,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 180 transitions, 384 flow [2022-11-25 17:24:16,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 172 transitions, 362 flow [2022-11-25 17:24:16,521 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:24:16,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 172 transitions, 362 flow [2022-11-25 17:24:16,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 172 transitions, 362 flow [2022-11-25 17:24:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 362 flow [2022-11-25 17:24:16,577 INFO L130 PetriNetUnfolder]: 12/172 cut-off events. [2022-11-25 17:24:16,578 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:24:16,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 12/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 201 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-11-25 17:24:16,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-25 17:24:42,872 INFO L134 LiptonReduction]: Checked pairs total: 3477 [2022-11-25 17:24:42,872 INFO L136 LiptonReduction]: Total number of compositions: 169 [2022-11-25 17:24:42,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:24:42,902 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;@40264680, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:24:42,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-25 17:24:42,905 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:24:42,905 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:24:42,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:42,906 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:24:42,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 22923, now seen corresponding path program 1 times [2022-11-25 17:24:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:42,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013993139] [2022-11-25 17:24:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:42,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:42,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:42,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:24:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:43,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:24:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:43,275 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:24:43,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:24:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:43,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:43,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:43,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013993139] [2022-11-25 17:24:43,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013993139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:43,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:43,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:24:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416554048] [2022-11-25 17:24:43,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:24:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:24:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:24:43,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:24:43,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:43,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:43,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:24:43,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:45,022 INFO L130 PetriNetUnfolder]: 5413/6908 cut-off events. [2022-11-25 17:24:45,022 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-11-25 17:24:45,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13945 conditions, 6908 events. 5413/6908 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 31044 event pairs, 2582 based on Foata normal form. 0/1945 useless extension candidates. Maximal degree in co-relation 5975. Up to 3425 conditions per place. [2022-11-25 17:24:45,082 INFO L137 encePairwiseOnDemand]: 339/349 looper letters, 78 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-11-25 17:24:45,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 362 flow [2022-11-25 17:24:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-11-25 17:24:45,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5176695319961796 [2022-11-25 17:24:45,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-11-25 17:24:45,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-11-25 17:24:45,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:45,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-11-25 17:24:45,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:45,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:45,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:45,135 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 542 transitions. [2022-11-25 17:24:45,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 362 flow [2022-11-25 17:24:45,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 338 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:24:45,152 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2022-11-25 17:24:45,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2022-11-25 17:24:45,159 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-11-25 17:24:45,160 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2022-11-25 17:24:45,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:45,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:45,161 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:24:45,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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 17:24:45,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:45,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash 22922, now seen corresponding path program 1 times [2022-11-25 17:24:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773934939] [2022-11-25 17:24:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:45,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:45,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:45,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:45,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:24:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:24:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:45,591 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:24:45,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:24:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:45,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:45,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:45,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773934939] [2022-11-25 17:24:45,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773934939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:45,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:45,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:24:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255543022] [2022-11-25 17:24:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:24:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:24:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:24:45,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:24:45,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:45,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:45,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:24:45,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:47,058 INFO L130 PetriNetUnfolder]: 5413/6906 cut-off events. [2022-11-25 17:24:47,058 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:24:47,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13821 conditions, 6906 events. 5413/6906 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 31295 event pairs, 2582 based on Foata normal form. 0/1947 useless extension candidates. Maximal degree in co-relation 6908. Up to 6844 conditions per place. [2022-11-25 17:24:47,107 INFO L137 encePairwiseOnDemand]: 347/349 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 17:24:47,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 186 flow [2022-11-25 17:24:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-11-25 17:24:47,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46609360076408785 [2022-11-25 17:24:47,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-11-25 17:24:47,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-11-25 17:24:47,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:47,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-11-25 17:24:47,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:47,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:47,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:47,118 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 488 transitions. [2022-11-25 17:24:47,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 186 flow [2022-11-25 17:24:47,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:47,122 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 104 flow [2022-11-25 17:24:47,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=104, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-11-25 17:24:47,124 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-11-25 17:24:47,124 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 104 flow [2022-11-25 17:24:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:47,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:47,126 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:24:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:47,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:47,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash 23069, now seen corresponding path program 1 times [2022-11-25 17:24:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:47,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254669396] [2022-11-25 17:24:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:47,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:47,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:47,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:24:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:24:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:47,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:47,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254669396] [2022-11-25 17:24:47,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254669396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:47,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:47,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:24:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357538272] [2022-11-25 17:24:47,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:47,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:24:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:24:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:24:47,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 349 [2022-11-25 17:24:47,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:47,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:47,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 349 [2022-11-25 17:24:47,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:48,173 INFO L130 PetriNetUnfolder]: 2707/3455 cut-off events. [2022-11-25 17:24:48,173 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 17:24:48,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6919 conditions, 3455 events. 2707/3455 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 14121 event pairs, 1291 based on Foata normal form. 1/976 useless extension candidates. Maximal degree in co-relation 6911. Up to 3424 conditions per place. [2022-11-25 17:24:48,198 INFO L137 encePairwiseOnDemand]: 344/349 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-11-25 17:24:48,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 186 flow [2022-11-25 17:24:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-11-25 17:24:48,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47468958930276983 [2022-11-25 17:24:48,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-11-25 17:24:48,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-11-25 17:24:48,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:48,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-11-25 17:24:48,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:48,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:48,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:48,214 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 104 flow. Second operand 3 states and 497 transitions. [2022-11-25 17:24:48,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 186 flow [2022-11-25 17:24:48,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 183 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:48,218 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 113 flow [2022-11-25 17:24:48,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-11-25 17:24:48,219 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2022-11-25 17:24:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 113 flow [2022-11-25 17:24:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:48,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:48,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:24:48,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:48,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:48,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:48,433 INFO L85 PathProgramCache]: Analyzing trace with hash 715175, now seen corresponding path program 1 times [2022-11-25 17:24:48,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:48,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152746487] [2022-11-25 17:24:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:48,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:48,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:48,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:24:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:24:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:48,649 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 17:24:48,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-25 17:24:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:48,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:48,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152746487] [2022-11-25 17:24:48,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152746487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:48,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:48,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:24:48,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523874950] [2022-11-25 17:24:48,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:48,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:24:48,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:24:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:24:48,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:24:48,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:48,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:48,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:24:48,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:49,408 INFO L130 PetriNetUnfolder]: 2132/2754 cut-off events. [2022-11-25 17:24:49,408 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-25 17:24:49,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5522 conditions, 2754 events. 2132/2754 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 11139 event pairs, 1016 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 5512. Up to 2723 conditions per place. [2022-11-25 17:24:49,424 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 17:24:49,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 42 transitions, 185 flow [2022-11-25 17:24:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-11-25 17:24:49,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46513849092645654 [2022-11-25 17:24:49,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-11-25 17:24:49,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-11-25 17:24:49,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:49,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-11-25 17:24:49,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:49,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:49,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:49,432 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 113 flow. Second operand 3 states and 487 transitions. [2022-11-25 17:24:49,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 42 transitions, 185 flow [2022-11-25 17:24:49,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:24:49,435 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 105 flow [2022-11-25 17:24:49,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 17:24:49,437 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-11-25 17:24:49,437 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 105 flow [2022-11-25 17:24:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:49,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:49,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:24:49,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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)] Ended with exit code 0 [2022-11-25 17:24:49,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:49,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash 715029, now seen corresponding path program 1 times [2022-11-25 17:24:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:49,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343935068] [2022-11-25 17:24:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:49,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:49,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:49,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:24:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:24:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:49,872 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:24:49,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:24:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:50,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:50,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343935068] [2022-11-25 17:24:50,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343935068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:50,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:24:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:24:50,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474125336] [2022-11-25 17:24:50,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:50,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:24:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:24:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:24:51,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 349 [2022-11-25 17:24:51,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:51,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:51,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 349 [2022-11-25 17:24:51,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:52,724 INFO L130 PetriNetUnfolder]: 4267/5511 cut-off events. [2022-11-25 17:24:52,724 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:24:52,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11044 conditions, 5511 events. 4267/5511 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 24810 event pairs, 2032 based on Foata normal form. 0/1652 useless extension candidates. Maximal degree in co-relation 11034. Up to 2724 conditions per place. [2022-11-25 17:24:52,759 INFO L137 encePairwiseOnDemand]: 344/349 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2022-11-25 17:24:52,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 375 flow [2022-11-25 17:24:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:24:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:24:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 948 transitions. [2022-11-25 17:24:52,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45272206303724927 [2022-11-25 17:24:52,764 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 948 transitions. [2022-11-25 17:24:52,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 948 transitions. [2022-11-25 17:24:52,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:52,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 948 transitions. [2022-11-25 17:24:52,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:52,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:52,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:52,772 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 105 flow. Second operand 6 states and 948 transitions. [2022-11-25 17:24:52,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 375 flow [2022-11-25 17:24:52,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 84 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:52,775 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 182 flow [2022-11-25 17:24:52,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2022-11-25 17:24:52,776 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-11-25 17:24:52,776 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 182 flow [2022-11-25 17:24:52,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:52,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:52,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:24:52,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:52,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:52,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash 715176, now seen corresponding path program 1 times [2022-11-25 17:24:52,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:52,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46412493] [2022-11-25 17:24:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:52,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:52,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:52,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:52,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:24:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:53,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:24:53,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:53,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:53,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:53,192 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-25 17:24:53,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-25 17:24:53,221 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:24:53,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 17:24:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:53,456 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 17:24:53,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:53,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46412493] [2022-11-25 17:24:53,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46412493] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:53,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:24:53,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-25 17:24:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965088048] [2022-11-25 17:24:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:24:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:24:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:24:54,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2022-11-25 17:24:54,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:54,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2022-11-25 17:24:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:54,703 INFO L130 PetriNetUnfolder]: 3115/4107 cut-off events. [2022-11-25 17:24:54,703 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:24:54,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 4107 events. 3115/4107 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 18644 event pairs, 1482 based on Foata normal form. 0/1353 useless extension candidates. Maximal degree in co-relation 8241. Up to 4045 conditions per place. [2022-11-25 17:24:54,728 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 41 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-11-25 17:24:54,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 240 flow [2022-11-25 17:24:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2022-11-25 17:24:54,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44030563514804205 [2022-11-25 17:24:54,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2022-11-25 17:24:54,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2022-11-25 17:24:54,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:54,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2022-11-25 17:24:54,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,735 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 182 flow. Second operand 3 states and 461 transitions. [2022-11-25 17:24:54,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 240 flow [2022-11-25 17:24:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 226 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:54,737 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 144 flow [2022-11-25 17:24:54,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 17:24:54,738 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-11-25 17:24:54,739 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 144 flow [2022-11-25 17:24:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:54,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:54,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:24:54,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:54,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:54,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash 687298896, now seen corresponding path program 1 times [2022-11-25 17:24:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:54,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128542965] [2022-11-25 17:24:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:54,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:54,955 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:54,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:24:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:24:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:55,148 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 17:24:55,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 17:24:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:55,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:55,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:55,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128542965] [2022-11-25 17:24:55,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128542965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:55,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:55,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:24:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954908658] [2022-11-25 17:24:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:24:55,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:24:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:24:55,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 349 [2022-11-25 17:24:55,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:55,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:55,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 349 [2022-11-25 17:24:55,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:56,166 INFO L130 PetriNetUnfolder]: 2941/3873 cut-off events. [2022-11-25 17:24:56,167 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:24:56,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 3873 events. 2941/3873 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 17301 event pairs, 1396 based on Foata normal form. 0/1309 useless extension candidates. Maximal degree in co-relation 7767. Up to 3811 conditions per place. [2022-11-25 17:24:56,190 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 17:24:56,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 220 flow [2022-11-25 17:24:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:24:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:24:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2022-11-25 17:24:56,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46131805157593125 [2022-11-25 17:24:56,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2022-11-25 17:24:56,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2022-11-25 17:24:56,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:56,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2022-11-25 17:24:56,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:56,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:56,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:56,198 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 144 flow. Second operand 3 states and 483 transitions. [2022-11-25 17:24:56,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 220 flow [2022-11-25 17:24:56,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:56,200 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 141 flow [2022-11-25 17:24:56,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2022-11-25 17:24:56,200 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2022-11-25 17:24:56,201 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 141 flow [2022-11-25 17:24:56,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:56,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:56,201 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:24:56,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:56,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:56,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:56,413 INFO L85 PathProgramCache]: Analyzing trace with hash 687298897, now seen corresponding path program 1 times [2022-11-25 17:24:56,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:56,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15427858] [2022-11-25 17:24:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:56,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:56,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:56,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:56,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:24:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:24:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:56,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:24:56,652 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-25 17:24:56,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-25 17:24:56,667 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 17:24:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:56,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:57,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15427858] [2022-11-25 17:24:57,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15427858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:57,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:24:57,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:24:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546214161] [2022-11-25 17:24:57,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:24:57,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:24:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:24:58,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:24:58,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 141 flow. Second operand has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:58,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:58,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:24:58,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:24:59,142 INFO L130 PetriNetUnfolder]: 2767/3639 cut-off events. [2022-11-25 17:24:59,143 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 17:24:59,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7316 conditions, 3639 events. 2767/3639 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 15989 event pairs, 1310 based on Foata normal form. 0/1265 useless extension candidates. Maximal degree in co-relation 7299. Up to 1791 conditions per place. [2022-11-25 17:24:59,164 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-11-25 17:24:59,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 341 flow [2022-11-25 17:24:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:24:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:24:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2022-11-25 17:24:59,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.439541547277937 [2022-11-25 17:24:59,168 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2022-11-25 17:24:59,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2022-11-25 17:24:59,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:24:59,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2022-11-25 17:24:59,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,173 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,173 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 141 flow. Second operand 5 states and 767 transitions. [2022-11-25 17:24:59,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 341 flow [2022-11-25 17:24:59,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:24:59,176 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 142 flow [2022-11-25 17:24:59,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2022-11-25 17:24:59,177 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-11-25 17:24:59,177 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 142 flow [2022-11-25 17:24:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:24:59,178 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:24:59,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:59,390 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:24:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -168575793, now seen corresponding path program 1 times [2022-11-25 17:24:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:24:59,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637108757] [2022-11-25 17:24:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:24:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:24:59,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:24:59,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:24:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:24:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:59,576 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:24:59,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:24:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:24:59,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:24:59,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:24:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637108757] [2022-11-25 17:24:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637108757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:24:59,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:24:59,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:24:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13861039] [2022-11-25 17:24:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:24:59,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:24:59,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:24:59,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:24:59,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:24:59,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 349 [2022-11-25 17:24:59,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:24:59,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:24:59,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 349 [2022-11-25 17:24:59,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:00,085 INFO L130 PetriNetUnfolder]: 1427/1935 cut-off events. [2022-11-25 17:25:00,085 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:25:00,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 1935 events. 1427/1935 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8064 event pairs, 662 based on Foata normal form. 0/827 useless extension candidates. Maximal degree in co-relation 3893. Up to 1886 conditions per place. [2022-11-25 17:25:00,094 INFO L137 encePairwiseOnDemand]: 344/349 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-11-25 17:25:00,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 38 transitions, 206 flow [2022-11-25 17:25:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:25:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:25:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2022-11-25 17:25:00,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4355300859598854 [2022-11-25 17:25:00,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2022-11-25 17:25:00,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2022-11-25 17:25:00,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:00,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2022-11-25 17:25:00,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,102 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,102 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 142 flow. Second operand 4 states and 608 transitions. [2022-11-25 17:25:00,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 38 transitions, 206 flow [2022-11-25 17:25:00,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 201 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:25:00,104 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 139 flow [2022-11-25 17:25:00,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-11-25 17:25:00,104 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2022-11-25 17:25:00,105 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 139 flow [2022-11-25 17:25:00,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:00,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:00,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:25:00,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:00,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:00,317 INFO L85 PathProgramCache]: Analyzing trace with hash -168575792, now seen corresponding path program 1 times [2022-11-25 17:25:00,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:00,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495685838] [2022-11-25 17:25:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:00,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:00,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:00,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:25:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:25:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:00,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:00,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-25 17:25:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:00,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:00,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495685838] [2022-11-25 17:25:00,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495685838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:00,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:00,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:25:00,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491490073] [2022-11-25 17:25:00,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:00,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:25:00,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:25:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:25:02,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:25:02,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 139 flow. Second operand has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 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 17:25:02,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:02,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:25:02,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:04,058 INFO L130 PetriNetUnfolder]: 2129/2937 cut-off events. [2022-11-25 17:25:04,058 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-25 17:25:04,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5944 conditions, 2937 events. 2129/2937 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 13921 event pairs, 686 based on Foata normal form. 0/1359 useless extension candidates. Maximal degree in co-relation 5926. Up to 875 conditions per place. [2022-11-25 17:25:04,072 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 98 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2022-11-25 17:25:04,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 527 flow [2022-11-25 17:25:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:25:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:25:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1385 transitions. [2022-11-25 17:25:04,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409423750397962 [2022-11-25 17:25:04,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1385 transitions. [2022-11-25 17:25:04,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1385 transitions. [2022-11-25 17:25:04,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:04,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1385 transitions. [2022-11-25 17:25:04,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.88888888888889) internal successors, (1385), 9 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:04,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:04,088 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:04,088 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 139 flow. Second operand 9 states and 1385 transitions. [2022-11-25 17:25:04,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 527 flow [2022-11-25 17:25:04,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 521 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:25:04,091 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 183 flow [2022-11-25 17:25:04,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2022-11-25 17:25:04,092 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2022-11-25 17:25:04,092 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 183 flow [2022-11-25 17:25:04,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 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 17:25:04,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:04,094 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:25:04,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:04,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:04,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -169022453, now seen corresponding path program 2 times [2022-11-25 17:25:04,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:04,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201583382] [2022-11-25 17:25:04,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:04,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:04,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:04,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:04,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:25:04,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:25:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:04,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:25:04,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:04,581 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:04,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:05,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201583382] [2022-11-25 17:25:05,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201583382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:05,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:05,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:25:05,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234144695] [2022-11-25 17:25:05,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:05,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:25:05,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:25:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:25:09,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2022-11-25 17:25:09,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 183 flow. Second operand has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:09,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:09,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2022-11-25 17:25:09,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:14,981 INFO L130 PetriNetUnfolder]: 7891/11071 cut-off events. [2022-11-25 17:25:14,982 INFO L131 PetriNetUnfolder]: For 2407/2802 co-relation queries the response was YES. [2022-11-25 17:25:14,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24679 conditions, 11071 events. 7891/11071 cut-off events. For 2407/2802 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 63121 event pairs, 4269 based on Foata normal form. 401/6199 useless extension candidates. Maximal degree in co-relation 24659. Up to 1278 conditions per place. [2022-11-25 17:25:15,025 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 245 selfloop transitions, 12 changer transitions 0/261 dead transitions. [2022-11-25 17:25:15,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 261 transitions, 1334 flow [2022-11-25 17:25:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:25:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:25:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1994 transitions. [2022-11-25 17:25:15,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4761222540592168 [2022-11-25 17:25:15,032 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1994 transitions. [2022-11-25 17:25:15,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1994 transitions. [2022-11-25 17:25:15,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:15,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1994 transitions. [2022-11-25 17:25:15,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.16666666666666) internal successors, (1994), 12 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:15,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:15,046 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:15,046 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 183 flow. Second operand 12 states and 1994 transitions. [2022-11-25 17:25:15,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 261 transitions, 1334 flow [2022-11-25 17:25:15,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 261 transitions, 1317 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 17:25:15,054 INFO L231 Difference]: Finished difference. Result has 73 places, 49 transitions, 267 flow [2022-11-25 17:25:15,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=49} [2022-11-25 17:25:15,055 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-11-25 17:25:15,055 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 49 transitions, 267 flow [2022-11-25 17:25:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:15,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:15,056 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:15,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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)] Ended with exit code 0 [2022-11-25 17:25:15,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:15,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash -930879191, now seen corresponding path program 1 times [2022-11-25 17:25:15,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:15,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900521221] [2022-11-25 17:25:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:15,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:15,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:15,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:25:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:25:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:15,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:15,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:15,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:16,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900521221] [2022-11-25 17:25:16,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900521221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:16,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:25:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684312686] [2022-11-25 17:25:16,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:25:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:25:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:25:19,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:25:19,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 49 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:19,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:19,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:25:19,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:22,518 INFO L130 PetriNetUnfolder]: 14951/19922 cut-off events. [2022-11-25 17:25:22,518 INFO L131 PetriNetUnfolder]: For 2338/2338 co-relation queries the response was YES. [2022-11-25 17:25:22,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45911 conditions, 19922 events. 14951/19922 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 112016 event pairs, 963 based on Foata normal form. 450/11543 useless extension candidates. Maximal degree in co-relation 45885. Up to 6057 conditions per place. [2022-11-25 17:25:22,613 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2022-11-25 17:25:22,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 648 flow [2022-11-25 17:25:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:25:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:25:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1237 transitions. [2022-11-25 17:25:22,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44305157593123207 [2022-11-25 17:25:22,618 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1237 transitions. [2022-11-25 17:25:22,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1237 transitions. [2022-11-25 17:25:22,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:22,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1237 transitions. [2022-11-25 17:25:22,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:22,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:22,627 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:22,628 INFO L175 Difference]: Start difference. First operand has 73 places, 49 transitions, 267 flow. Second operand 8 states and 1237 transitions. [2022-11-25 17:25:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 648 flow [2022-11-25 17:25:22,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 619 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-25 17:25:22,637 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 327 flow [2022-11-25 17:25:22,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2022-11-25 17:25:22,637 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2022-11-25 17:25:22,638 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 327 flow [2022-11-25 17:25:22,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:22,639 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:22,639 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:22,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:22,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:22,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash -930708855, now seen corresponding path program 1 times [2022-11-25 17:25:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410403281] [2022-11-25 17:25:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:22,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:22,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:22,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:25:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:25:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:23,115 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:23,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:23,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:23,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410403281] [2022-11-25 17:25:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410403281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:23,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:23,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:25:23,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362500554] [2022-11-25 17:25:23,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:23,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:25:23,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:25:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:25:26,354 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] [2022-11-25 17:25:26,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:25:26,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:26,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:26,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:25:26,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:28,784 INFO L130 PetriNetUnfolder]: 11936/16106 cut-off events. [2022-11-25 17:25:28,784 INFO L131 PetriNetUnfolder]: For 27079/28519 co-relation queries the response was YES. [2022-11-25 17:25:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45225 conditions, 16106 events. 11936/16106 cut-off events. For 27079/28519 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 88069 event pairs, 6228 based on Foata normal form. 1440/11042 useless extension candidates. Maximal degree in co-relation 45193. Up to 14100 conditions per place. [2022-11-25 17:25:28,862 INFO L137 encePairwiseOnDemand]: 345/349 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-11-25 17:25:28,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 591 flow [2022-11-25 17:25:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:25:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:25:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2022-11-25 17:25:28,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.433810888252149 [2022-11-25 17:25:28,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2022-11-25 17:25:28,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2022-11-25 17:25:28,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:28,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2022-11-25 17:25:28,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,872 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,872 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 327 flow. Second operand 5 states and 757 transitions. [2022-11-25 17:25:28,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 591 flow [2022-11-25 17:25:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 552 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-11-25 17:25:28,894 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 304 flow [2022-11-25 17:25:28,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2022-11-25 17:25:28,895 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2022-11-25 17:25:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 304 flow [2022-11-25 17:25:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:28,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:28,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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 17:25:29,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:29,108 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:29,108 INFO L85 PathProgramCache]: Analyzing trace with hash -930708856, now seen corresponding path program 1 times [2022-11-25 17:25:29,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:29,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835639502] [2022-11-25 17:25:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:29,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:29,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:29,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:29,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:25:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:25:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:29,344 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 17:25:29,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-25 17:25:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:29,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:29,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:29,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835639502] [2022-11-25 17:25:29,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835639502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:29,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:29,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:29,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286854668] [2022-11-25 17:25:29,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:29,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:29,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:29,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:29,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 349 [2022-11-25 17:25:29,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:29,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:29,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 349 [2022-11-25 17:25:29,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:31,263 INFO L130 PetriNetUnfolder]: 11054/14864 cut-off events. [2022-11-25 17:25:31,263 INFO L131 PetriNetUnfolder]: For 19989/21253 co-relation queries the response was YES. [2022-11-25 17:25:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39170 conditions, 14864 events. 11054/14864 cut-off events. For 19989/21253 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 80071 event pairs, 5724 based on Foata normal form. 1264/10270 useless extension candidates. Maximal degree in co-relation 39138. Up to 14621 conditions per place. [2022-11-25 17:25:31,352 INFO L137 encePairwiseOnDemand]: 346/349 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-11-25 17:25:31,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 50 transitions, 392 flow [2022-11-25 17:25:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2022-11-25 17:25:31,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44412607449856734 [2022-11-25 17:25:31,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2022-11-25 17:25:31,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2022-11-25 17:25:31,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:31,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2022-11-25 17:25:31,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,360 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 304 flow. Second operand 3 states and 465 transitions. [2022-11-25 17:25:31,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 50 transitions, 392 flow [2022-11-25 17:25:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:25:31,379 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 297 flow [2022-11-25 17:25:31,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=297, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2022-11-25 17:25:31,380 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2022-11-25 17:25:31,380 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 297 flow [2022-11-25 17:25:31,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:31,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:31,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:31,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:31,594 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1212791490, now seen corresponding path program 1 times [2022-11-25 17:25:31,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823566235] [2022-11-25 17:25:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:31,596 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:31,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:25:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:31,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:25:31,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:31,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:32,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-25 17:25:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:32,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:32,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823566235] [2022-11-25 17:25:32,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823566235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:32,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:32,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:25:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843436500] [2022-11-25 17:25:32,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:32,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:25:32,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:25:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:25:34,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:25:34,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:34,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:34,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:25:34,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:37,277 INFO L130 PetriNetUnfolder]: 15293/21011 cut-off events. [2022-11-25 17:25:37,277 INFO L131 PetriNetUnfolder]: For 33980/36104 co-relation queries the response was YES. [2022-11-25 17:25:37,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56773 conditions, 21011 events. 15293/21011 cut-off events. For 33980/36104 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 121108 event pairs, 5143 based on Foata normal form. 2124/16245 useless extension candidates. Maximal degree in co-relation 56741. Up to 12177 conditions per place. [2022-11-25 17:25:37,391 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2022-11-25 17:25:37,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 825 flow [2022-11-25 17:25:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:25:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:25:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1365 transitions. [2022-11-25 17:25:37,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43457497612225404 [2022-11-25 17:25:37,396 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1365 transitions. [2022-11-25 17:25:37,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1365 transitions. [2022-11-25 17:25:37,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:37,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1365 transitions. [2022-11-25 17:25:37,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.66666666666666) internal successors, (1365), 9 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,405 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 297 flow. Second operand 9 states and 1365 transitions. [2022-11-25 17:25:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 825 flow [2022-11-25 17:25:37,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:37,429 INFO L231 Difference]: Finished difference. Result has 86 places, 53 transitions, 338 flow [2022-11-25 17:25:37,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=53} [2022-11-25 17:25:37,430 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2022-11-25 17:25:37,430 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 53 transitions, 338 flow [2022-11-25 17:25:37,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:37,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:37,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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)] Ended with exit code 0 [2022-11-25 17:25:37,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:37,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1058166894, now seen corresponding path program 1 times [2022-11-25 17:25:37,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:37,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203055531] [2022-11-25 17:25:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:37,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:37,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:37,645 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:37,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:25:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:25:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:37,914 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:37,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:38,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:38,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203055531] [2022-11-25 17:25:38,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203055531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:38,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:38,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:25:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986294753] [2022-11-25 17:25:38,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:38,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:25:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:25:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:25:41,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:25:41,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 53 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:41,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:41,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:25:41,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:48,807 INFO L130 PetriNetUnfolder]: 29713/40111 cut-off events. [2022-11-25 17:25:48,808 INFO L131 PetriNetUnfolder]: For 67950/71874 co-relation queries the response was YES. [2022-11-25 17:25:49,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118378 conditions, 40111 events. 29713/40111 cut-off events. For 67950/71874 co-relation queries the response was YES. Maximal size of possible extension queue 1652. Compared 246805 event pairs, 4383 based on Foata normal form. 3924/34783 useless extension candidates. Maximal degree in co-relation 118343. Up to 10281 conditions per place. [2022-11-25 17:25:49,256 INFO L137 encePairwiseOnDemand]: 343/349 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2022-11-25 17:25:49,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 162 transitions, 1142 flow [2022-11-25 17:25:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:25:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:25:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1364 transitions. [2022-11-25 17:25:49,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43425660617637696 [2022-11-25 17:25:49,261 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1364 transitions. [2022-11-25 17:25:49,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1364 transitions. [2022-11-25 17:25:49,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:49,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1364 transitions. [2022-11-25 17:25:49,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.55555555555554) internal successors, (1364), 9 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,270 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,271 INFO L175 Difference]: Start difference. First operand has 86 places, 53 transitions, 338 flow. Second operand 9 states and 1364 transitions. [2022-11-25 17:25:49,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 162 transitions, 1142 flow [2022-11-25 17:25:49,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1131 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:25:49,320 INFO L231 Difference]: Finished difference. Result has 94 places, 58 transitions, 409 flow [2022-11-25 17:25:49,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=94, PETRI_TRANSITIONS=58} [2022-11-25 17:25:49,321 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2022-11-25 17:25:49,321 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 58 transitions, 409 flow [2022-11-25 17:25:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:49,321 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:49,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:49,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:49,535 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:25:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 784894736, now seen corresponding path program 2 times [2022-11-25 17:25:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:49,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841933863] [2022-11-25 17:25:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:49,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:49,537 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:49,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:25:49,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:25:49,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:49,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:25:49,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:49,857 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:49,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:50,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:51,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841933863] [2022-11-25 17:25:51,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841933863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:51,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:51,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-25 17:25:51,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725983978] [2022-11-25 17:25:51,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:51,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:25:51,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:25:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:26:05,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 349 [2022-11-25 17:26:05,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 58 transitions, 409 flow. Second operand has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:05,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:05,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 349 [2022-11-25 17:26:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:23,021 INFO L130 PetriNetUnfolder]: 29869/40797 cut-off events. [2022-11-25 17:26:23,021 INFO L131 PetriNetUnfolder]: For 106397/109178 co-relation queries the response was YES. [2022-11-25 17:26:23,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138922 conditions, 40797 events. 29869/40797 cut-off events. For 106397/109178 co-relation queries the response was YES. Maximal size of possible extension queue 1764. Compared 258438 event pairs, 9063 based on Foata normal form. 3087/35251 useless extension candidates. Maximal degree in co-relation 138883. Up to 15850 conditions per place. [2022-11-25 17:26:23,313 INFO L137 encePairwiseOnDemand]: 341/349 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2022-11-25 17:26:23,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 324 transitions, 2433 flow [2022-11-25 17:26:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:26:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:26:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2810 transitions. [2022-11-25 17:26:23,321 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42376715427537326 [2022-11-25 17:26:23,321 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2810 transitions. [2022-11-25 17:26:23,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2810 transitions. [2022-11-25 17:26:23,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:23,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2810 transitions. [2022-11-25 17:26:23,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.89473684210526) internal successors, (2810), 19 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:23,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 349.0) internal successors, (6980), 20 states have internal predecessors, (6980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:23,339 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 349.0) internal successors, (6980), 20 states have internal predecessors, (6980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:23,339 INFO L175 Difference]: Start difference. First operand has 94 places, 58 transitions, 409 flow. Second operand 19 states and 2810 transitions. [2022-11-25 17:26:23,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 324 transitions, 2433 flow [2022-11-25 17:26:23,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 324 transitions, 2214 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-11-25 17:26:23,588 INFO L231 Difference]: Finished difference. Result has 116 places, 70 transitions, 552 flow [2022-11-25 17:26:23,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=552, PETRI_PLACES=116, PETRI_TRANSITIONS=70} [2022-11-25 17:26:23,589 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2022-11-25 17:26:23,589 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 70 transitions, 552 flow [2022-11-25 17:26:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:23,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:23,590 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:23,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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)] Ended with exit code 0 [2022-11-25 17:26:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:23,802 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:26:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1561818899, now seen corresponding path program 1 times [2022-11-25 17:26:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:23,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004556231] [2022-11-25 17:26:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:23,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:23,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:23,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:23,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:26:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:26:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:24,059 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:26:24,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:26:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:24,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:25,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004556231] [2022-11-25 17:26:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004556231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:25,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:26:25,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:26:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481933954] [2022-11-25 17:26:25,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:26:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:26:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:26:31,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 349 [2022-11-25 17:26:31,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 70 transitions, 552 flow. Second operand has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:31,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:31,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 349 [2022-11-25 17:26:31,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:41,568 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2022-11-25 17:26:41,568 INFO L131 PetriNetUnfolder]: For 162406/169209 co-relation queries the response was YES. [2022-11-25 17:26:41,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143635 conditions, 38781 events. 27287/38781 cut-off events. For 162406/169209 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 248901 event pairs, 17843 based on Foata normal form. 6803/40814 useless extension candidates. Maximal degree in co-relation 143589. Up to 22069 conditions per place. [2022-11-25 17:26:41,880 INFO L137 encePairwiseOnDemand]: 341/349 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2022-11-25 17:26:41,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1388 flow [2022-11-25 17:26:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:26:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:26:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2022-11-25 17:26:41,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41417035686376663 [2022-11-25 17:26:41,885 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2022-11-25 17:26:41,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2022-11-25 17:26:41,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:41,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2022-11-25 17:26:41,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:41,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 349.0) internal successors, (4188), 12 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:41,894 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 349.0) internal successors, (4188), 12 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:41,894 INFO L175 Difference]: Start difference. First operand has 116 places, 70 transitions, 552 flow. Second operand 11 states and 1590 transitions. [2022-11-25 17:26:41,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1388 flow [2022-11-25 17:26:42,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1299 flow, removed 31 selfloop flow, removed 9 redundant places. [2022-11-25 17:26:42,132 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 545 flow [2022-11-25 17:26:42,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=545, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2022-11-25 17:26:42,133 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2022-11-25 17:26:42,133 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 545 flow [2022-11-25 17:26:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:42,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:42,133 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:42,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:42,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:42,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:26:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:42,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1171749636, now seen corresponding path program 1 times [2022-11-25 17:26:42,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:42,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595680942] [2022-11-25 17:26:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:42,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:42,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:42,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:26:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:26:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:42,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:43,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:43,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595680942] [2022-11-25 17:26:43,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595680942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:43,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:26:43,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:26:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129092395] [2022-11-25 17:26:43,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:26:43,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:26:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:26:44,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2022-11-25 17:26:44,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 545 flow. Second operand has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:44,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:44,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2022-11-25 17:26:44,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:50,623 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2022-11-25 17:26:50,624 INFO L131 PetriNetUnfolder]: For 130321/135879 co-relation queries the response was YES. [2022-11-25 17:26:50,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123942 conditions, 30859 events. 21755/30859 cut-off events. For 130321/135879 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 192015 event pairs, 11742 based on Foata normal form. 5646/34866 useless extension candidates. Maximal degree in co-relation 123896. Up to 22599 conditions per place. [2022-11-25 17:26:50,897 INFO L137 encePairwiseOnDemand]: 341/349 looper letters, 147 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2022-11-25 17:26:50,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 160 transitions, 1341 flow [2022-11-25 17:26:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:26:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:26:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1360 transitions. [2022-11-25 17:26:50,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329831263928685 [2022-11-25 17:26:50,902 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1360 transitions. [2022-11-25 17:26:50,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1360 transitions. [2022-11-25 17:26:50,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:50,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1360 transitions. [2022-11-25 17:26:50,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.11111111111111) internal successors, (1360), 9 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:50,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:50,911 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:50,911 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 545 flow. Second operand 9 states and 1360 transitions. [2022-11-25 17:26:50,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 160 transitions, 1341 flow [2022-11-25 17:26:51,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1320 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-25 17:26:51,474 INFO L231 Difference]: Finished difference. Result has 124 places, 75 transitions, 555 flow [2022-11-25 17:26:51,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=555, PETRI_PLACES=124, PETRI_TRANSITIONS=75} [2022-11-25 17:26:51,474 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2022-11-25 17:26:51,474 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 75 transitions, 555 flow [2022-11-25 17:26:51,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:51,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:51,475 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-25 17:26:51,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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 17:26:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:51,688 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:26:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -884592993, now seen corresponding path program 3 times [2022-11-25 17:26:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:51,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976965605] [2022-11-25 17:26:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:26:51,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:51,690 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:51,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:26:51,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:26:51,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:26:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:52,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:26:52,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:26:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:52,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:52,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-25 17:26:52,858 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 17:26:52,862 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 17:26:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:55,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:55,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976965605] [2022-11-25 17:26:55,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976965605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:55,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:26:55,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-25 17:26:55,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869652341] [2022-11-25 17:26:55,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:55,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:26:55,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:55,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:26:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:27:14,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 349 [2022-11-25 17:27:14,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 75 transitions, 555 flow. Second operand has 21 states, 21 states have (on average 141.14285714285714) internal successors, (2964), 21 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:14,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:14,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 349 [2022-11-25 17:27:14,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:35,229 INFO L130 PetriNetUnfolder]: 31437/43945 cut-off events. [2022-11-25 17:27:35,230 INFO L131 PetriNetUnfolder]: For 161102/165101 co-relation queries the response was YES. [2022-11-25 17:27:35,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191531 conditions, 43945 events. 31437/43945 cut-off events. For 161102/165101 co-relation queries the response was YES. Maximal size of possible extension queue 1957. Compared 294564 event pairs, 10865 based on Foata normal form. 4345/44443 useless extension candidates. Maximal degree in co-relation 191483. Up to 19699 conditions per place. [2022-11-25 17:27:35,621 INFO L137 encePairwiseOnDemand]: 340/349 looper letters, 395 selfloop transitions, 46 changer transitions 0/446 dead transitions. [2022-11-25 17:27:35,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 446 transitions, 3412 flow [2022-11-25 17:27:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:27:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:27:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3659 transitions. [2022-11-25 17:27:35,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368433619866285 [2022-11-25 17:27:35,627 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3659 transitions. [2022-11-25 17:27:35,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3659 transitions. [2022-11-25 17:27:35,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:35,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3659 transitions. [2022-11-25 17:27:35,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 152.45833333333334) internal successors, (3659), 24 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:35,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 349.0) internal successors, (8725), 25 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:35,640 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 349.0) internal successors, (8725), 25 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:35,640 INFO L175 Difference]: Start difference. First operand has 124 places, 75 transitions, 555 flow. Second operand 24 states and 3659 transitions. [2022-11-25 17:27:35,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 446 transitions, 3412 flow [2022-11-25 17:27:36,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 446 transitions, 3396 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:27:36,976 INFO L231 Difference]: Finished difference. Result has 153 places, 103 transitions, 963 flow [2022-11-25 17:27:36,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=963, PETRI_PLACES=153, PETRI_TRANSITIONS=103} [2022-11-25 17:27:36,977 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2022-11-25 17:27:36,977 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 103 transitions, 963 flow [2022-11-25 17:27:36,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 141.14285714285714) internal successors, (2964), 21 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:27:36,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:36,978 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:27:36,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/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)] Ended with exit code 0 [2022-11-25 17:27:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:27:37,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 17:27:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1002901557, now seen corresponding path program 3 times [2022-11-25 17:27:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:27:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734817949] [2022-11-25 17:27:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:27:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:27:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:27:37,193 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:27:37,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5b81b2-30b3-4f12-9b0f-156651adcfd0/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:27:37,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:27:37,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:27:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:37,551 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:27:37,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:27:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:38,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:41,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:27:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734817949] [2022-11-25 17:27:41,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734817949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:41,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:27:41,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:27:41,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556150540] [2022-11-25 17:27:41,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:41,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:27:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:27:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:27:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:28:00,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2022-11-25 17:28:00,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 103 transitions, 963 flow. Second operand has 24 states, 24 states have (on average 146.0) internal successors, (3504), 24 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:00,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:00,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2022-11-25 17:28:00,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:42,451 INFO L130 PetriNetUnfolder]: 64229/88630 cut-off events. [2022-11-25 17:28:42,452 INFO L131 PetriNetUnfolder]: For 584724/600216 co-relation queries the response was YES. [2022-11-25 17:28:42,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436872 conditions, 88630 events. 64229/88630 cut-off events. For 584724/600216 co-relation queries the response was YES. Maximal size of possible extension queue 2395. Compared 583782 event pairs, 41969 based on Foata normal form. 15462/103980 useless extension candidates. Maximal degree in co-relation 436813. Up to 26169 conditions per place.