./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/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_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/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_e01834c9-301e-4c34-ac23-3057a8290c50/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 17:32:45,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:32:45,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:32:45,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:32:45,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:32:45,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:32:45,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:32:45,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:32:45,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:32:45,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:32:45,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:32:45,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:32:45,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:32:45,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:32:45,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:32:45,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:32:45,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:32:45,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:32:45,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:32:45,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:32:45,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:32:45,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:32:45,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:32:45,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:32:45,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:32:45,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:32:45,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:32:45,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:32:45,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:32:45,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:32:45,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:32:45,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:32:45,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:32:45,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:32:45,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:32:45,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:32:45,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:32:45,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:32:45,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:32:45,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:32:45,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:32:45,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:32:45,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:32:45,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:32:45,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:32:45,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:32:45,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:32:45,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:32:45,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:32:45,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:32:45,637 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:32:45,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:32:45,639 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:32:45,639 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:32:45,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:32:45,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:32:45,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:32:45,640 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:32:45,641 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:32:45,641 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:32:45,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:32:45,641 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:32:45,642 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:32:45,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:32:45,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:32:45,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:32:45,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:32:45,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:32:45,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:32:45,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:32:45,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:32:45,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:32:45,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:32:45,645 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:32:45,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:32:45,646 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_e01834c9-301e-4c34-ac23-3057a8290c50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-25 17:32:46,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:32:46,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:32:46,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:32:46,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:32:46,065 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:32:46,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-25 17:32:49,708 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:32:50,022 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:32:50,023 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-25 17:32:50,036 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data/217a71bd7/0ae8d6a7d366412fb6a3488eaf9a3a62/FLAG405772179 [2022-11-25 17:32:50,062 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data/217a71bd7/0ae8d6a7d366412fb6a3488eaf9a3a62 [2022-11-25 17:32:50,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:32:50,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:32:50,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:50,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:32:50,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:32:50,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:50" (1/1) ... [2022-11-25 17:32:50,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8b8385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:50, skipping insertion in model container [2022-11-25 17:32:50,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:50" (1/1) ... [2022-11-25 17:32:50,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:32:50,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:32:50,435 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_e01834c9-301e-4c34-ac23-3057a8290c50/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-25 17:32:50,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:50,477 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 17:32:50,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e537e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:50, skipping insertion in model container [2022-11-25 17:32:50,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:50,481 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:32:50,485 INFO L158 Benchmark]: Toolchain (without parser) took 410.93ms. Allocated memory is still 172.0MB. Free memory was 131.7MB in the beginning and 121.9MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 17:32:50,485 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 172.0MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:32:50,486 INFO L158 Benchmark]: CACSL2BoogieTranslator took 404.06ms. Allocated memory is still 172.0MB. Free memory was 131.4MB in the beginning and 121.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 17:32:50,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 172.0MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 404.06ms. Allocated memory is still 172.0MB. Free memory was 131.4MB in the beginning and 121.9MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/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_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/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_e01834c9-301e-4c34-ac23-3057a8290c50/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 17:32:53,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:32:53,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:32:53,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:32:53,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:32:53,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:32:53,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:32:53,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:32:53,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:32:53,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:32:53,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:32:53,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:32:53,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:32:53,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:32:53,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:32:53,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:32:53,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:32:53,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:32:53,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:32:53,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:32:53,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:32:53,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:32:53,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:32:53,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:32:53,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:32:53,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:32:53,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:32:53,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:32:53,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:32:53,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:32:53,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:32:53,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:32:53,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:32:53,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:32:53,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:32:53,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:32:53,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:32:53,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:32:53,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:32:53,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:32:53,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:32:53,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:32:53,426 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:32:53,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:32:53,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:32:53,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:32:53,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:32:53,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:32:53,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:32:53,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:32:53,431 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:32:53,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:32:53,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:32:53,432 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:32:53,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:32:53,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:32:53,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:32:53,433 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:32:53,434 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:32:53,434 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:32:53,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:32:53,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:32:53,435 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:32:53,436 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:32:53,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:32:53,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:32:53,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:32:53,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:32:53,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:32:53,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:32:53,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:32:53,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:32:53,439 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:32:53,439 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:32:53,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:32:53,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:32:53,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:32:53,441 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:32:53,441 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_e01834c9-301e-4c34-ac23-3057a8290c50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-25 17:32:53,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:32:53,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:32:53,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:32:53,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:32:53,992 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:32:53,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-25 17:32:57,488 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:32:57,775 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:32:57,775 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-25 17:32:57,784 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data/3249306d0/3bb80fe658e94b9f96a5319376dacd69/FLAGab400782f [2022-11-25 17:32:57,800 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/data/3249306d0/3bb80fe658e94b9f96a5319376dacd69 [2022-11-25 17:32:57,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:32:57,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:32:57,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:57,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:32:57,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:32:57,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:57" (1/1) ... [2022-11-25 17:32:57,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381b0d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:57, skipping insertion in model container [2022-11-25 17:32:57,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:32:57" (1/1) ... [2022-11-25 17:32:57,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:32:57,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:32:58,089 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_e01834c9-301e-4c34-ac23-3057a8290c50/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-25 17:32:58,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:58,122 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:32:58,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:32:58,145 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_e01834c9-301e-4c34-ac23-3057a8290c50/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-25 17:32:58,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:58,158 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:32:58,187 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_e01834c9-301e-4c34-ac23-3057a8290c50/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-25 17:32:58,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:32:58,216 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:32:58,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58 WrapperNode [2022-11-25 17:32:58,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:32:58,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:32:58,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:32:58,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:32:58,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,284 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-11-25 17:32:58,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:32:58,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:32:58,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:32:58,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:32:58,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,328 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:32:58,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:32:58,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:32:58,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:32:58,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (1/1) ... [2022-11-25 17:32:58,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:32:58,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:58,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:32:58,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:32:58,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:32:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:32:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:32:58,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:32:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:32:58,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:32:58,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:32:58,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:32:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:32:58,476 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:32:58,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:32:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:32:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:32:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:32:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:32:58,480 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 17:32:58,717 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:32:58,719 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:32:59,732 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:32:59,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:32:59,752 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 17:32:59,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:32:59 BoogieIcfgContainer [2022-11-25 17:32:59,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:32:59,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:32:59,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:32:59,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:32:59,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:32:57" (1/3) ... [2022-11-25 17:32:59,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:32:59, skipping insertion in model container [2022-11-25 17:32:59,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:32:58" (2/3) ... [2022-11-25 17:32:59,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:32:59, skipping insertion in model container [2022-11-25 17:32:59,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:32:59" (3/3) ... [2022-11-25 17:32:59,773 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-11-25 17:32:59,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:32:59,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-25 17:32:59,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:32:59,995 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:33:00,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-11-25 17:33:00,305 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-11-25 17:33:00,305 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:33:00,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 390 events. 29/390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 654 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-11-25 17:33:00,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 393 transitions, 810 flow [2022-11-25 17:33:00,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 366 places, 385 transitions, 788 flow [2022-11-25 17:33:00,343 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:33:00,362 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 366 places, 385 transitions, 788 flow [2022-11-25 17:33:00,366 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 366 places, 385 transitions, 788 flow [2022-11-25 17:33:00,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 366 places, 385 transitions, 788 flow [2022-11-25 17:33:00,499 INFO L130 PetriNetUnfolder]: 29/385 cut-off events. [2022-11-25 17:33:00,499 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:33:00,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 385 events. 29/385 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 654 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-11-25 17:33:00,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-11-25 17:34:16,827 INFO L134 LiptonReduction]: Checked pairs total: 21310 [2022-11-25 17:34:16,828 INFO L136 LiptonReduction]: Total number of compositions: 462 [2022-11-25 17:34:16,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:34:16,857 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;@76ffb2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:34:16,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-25 17:34:16,862 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:34:16,862 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:34:16,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:16,863 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:34:16,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:34:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 49740, now seen corresponding path program 1 times [2022-11-25 17:34:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:16,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105960770] [2022-11-25 17:34:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:16,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:16,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:34:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:17,389 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:34:17,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:34:17,467 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 17:34:17,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:17,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105960770] [2022-11-25 17:34:17,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105960770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:17,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:17,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:34:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162837563] [2022-11-25 17:34:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:18,186 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 855 [2022-11-25 17:34:18,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:18,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:18,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 855 [2022-11-25 17:34:18,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:22,311 INFO L130 PetriNetUnfolder]: 9817/12314 cut-off events. [2022-11-25 17:34:22,311 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-11-25 17:34:22,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24805 conditions, 12314 events. 9817/12314 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 57908 event pairs, 4782 based on Foata normal form. 0/2949 useless extension candidates. Maximal degree in co-relation 10535. Up to 6129 conditions per place. [2022-11-25 17:34:22,421 INFO L137 encePairwiseOnDemand]: 843/855 looper letters, 96 selfloop transitions, 6 changer transitions 0/105 dead transitions. [2022-11-25 17:34:22,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 105 transitions, 450 flow [2022-11-25 17:34:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1155 transitions. [2022-11-25 17:34:22,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4502923976608187 [2022-11-25 17:34:22,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1155 transitions. [2022-11-25 17:34:22,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1155 transitions. [2022-11-25 17:34:22,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:22,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1155 transitions. [2022-11-25 17:34:22,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:22,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:22,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:22,486 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 136 flow. Second operand 3 states and 1155 transitions. [2022-11-25 17:34:22,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 105 transitions, 450 flow [2022-11-25 17:34:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 105 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:34:22,501 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 168 flow [2022-11-25 17:34:22,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2022-11-25 17:34:22,510 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2022-11-25 17:34:22,510 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 168 flow [2022-11-25 17:34:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:22,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:22,513 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:34:22,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:22,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:22,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:34:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash 49739, now seen corresponding path program 1 times [2022-11-25 17:34:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:22,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818731528] [2022-11-25 17:34:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:22,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:22,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:22,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:22,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:22,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:34:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:22,921 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:34:22,921 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 17:34:22,958 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 17:34:22,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:22,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818731528] [2022-11-25 17:34:22,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818731528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:22,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:22,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:34:22,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939605641] [2022-11-25 17:34:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:22,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:23,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 855 [2022-11-25 17:34:23,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:23,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:23,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 855 [2022-11-25 17:34:23,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:26,297 INFO L130 PetriNetUnfolder]: 9817/12308 cut-off events. [2022-11-25 17:34:26,297 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:34:26,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24640 conditions, 12308 events. 9817/12308 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 58031 event pairs, 4782 based on Foata normal form. 4/2959 useless extension candidates. Maximal degree in co-relation 12300. Up to 12246 conditions per place. [2022-11-25 17:34:26,406 INFO L137 encePairwiseOnDemand]: 851/855 looper letters, 54 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-11-25 17:34:26,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 272 flow [2022-11-25 17:34:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1097 transitions. [2022-11-25 17:34:26,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4276803118908382 [2022-11-25 17:34:26,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1097 transitions. [2022-11-25 17:34:26,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1097 transitions. [2022-11-25 17:34:26,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:26,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1097 transitions. [2022-11-25 17:34:26,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:26,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:26,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:26,431 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 168 flow. Second operand 3 states and 1097 transitions. [2022-11-25 17:34:26,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 272 flow [2022-11-25 17:34:26,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:34:26,436 INFO L231 Difference]: Finished difference. Result has 55 places, 58 transitions, 152 flow [2022-11-25 17:34:26,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=58} [2022-11-25 17:34:26,438 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2022-11-25 17:34:26,439 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 58 transitions, 152 flow [2022-11-25 17:34:26,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:26,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:26,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:34:26,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:26,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:26,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:34:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1548032, now seen corresponding path program 1 times [2022-11-25 17:34:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:26,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655229315] [2022-11-25 17:34:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:26,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:26,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:26,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:26,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:26,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:34:26,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:26,943 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:34:26,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:34:27,038 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 17:34:27,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:27,361 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 17:34:27,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:27,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655229315] [2022-11-25 17:34:27,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655229315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:27,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:34:27,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:34:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069591349] [2022-11-25 17:34:27,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:27,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:34:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:34:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:34:29,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 855 [2022-11-25 17:34:29,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 58 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:29,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:29,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 855 [2022-11-25 17:34:29,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:31,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:33,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:34:38,100 INFO L130 PetriNetUnfolder]: 14732/18472 cut-off events. [2022-11-25 17:34:38,100 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:34:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36977 conditions, 18472 events. 14732/18472 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 1607. Compared 90974 event pairs, 7173 based on Foata normal form. 0/4432 useless extension candidates. Maximal degree in co-relation 36969. Up to 6127 conditions per place. [2022-11-25 17:34:38,374 INFO L137 encePairwiseOnDemand]: 843/855 looper letters, 131 selfloop transitions, 23 changer transitions 0/157 dead transitions. [2022-11-25 17:34:38,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 157 transitions, 698 flow [2022-11-25 17:34:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:34:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:34:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2160 transitions. [2022-11-25 17:34:38,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2022-11-25 17:34:38,386 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2160 transitions. [2022-11-25 17:34:38,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2160 transitions. [2022-11-25 17:34:38,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:38,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2160 transitions. [2022-11-25 17:34:38,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 360.0) internal successors, (2160), 6 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 855.0) internal successors, (5985), 7 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,412 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 855.0) internal successors, (5985), 7 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,413 INFO L175 Difference]: Start difference. First operand has 55 places, 58 transitions, 152 flow. Second operand 6 states and 2160 transitions. [2022-11-25 17:34:38,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 157 transitions, 698 flow [2022-11-25 17:34:38,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 157 transitions, 697 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:38,421 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 321 flow [2022-11-25 17:34:38,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2022-11-25 17:34:38,427 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-11-25 17:34:38,427 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 321 flow [2022-11-25 17:34:38,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 334.0) internal successors, (2004), 6 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:38,429 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:34:38,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:38,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:38,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:34:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash 48120262, now seen corresponding path program 1 times [2022-11-25 17:34:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:38,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147903368] [2022-11-25 17:34:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:38,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:38,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:38,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:38,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:38,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:34:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:38,995 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-25 17:34:38,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-25 17:34:39,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:39,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:34:39,232 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:34:39,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:34:39,256 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 17:34:39,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:39,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:39,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147903368] [2022-11-25 17:34:39,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147903368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:39,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:39,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:34:39,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361007487] [2022-11-25 17:34:39,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:39,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:34:39,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:34:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:34:39,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 855 [2022-11-25 17:34:39,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:39,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:39,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 855 [2022-11-25 17:34:39,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:42,985 INFO L130 PetriNetUnfolder]: 11446/14508 cut-off events. [2022-11-25 17:34:42,985 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:34:43,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29110 conditions, 14508 events. 11446/14508 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 71177 event pairs, 5568 based on Foata normal form. 0/3753 useless extension candidates. Maximal degree in co-relation 29097. Up to 14415 conditions per place. [2022-11-25 17:34:43,079 INFO L137 encePairwiseOnDemand]: 852/855 looper letters, 68 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-11-25 17:34:43,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 447 flow [2022-11-25 17:34:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2022-11-25 17:34:43,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346978557504873 [2022-11-25 17:34:43,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2022-11-25 17:34:43,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2022-11-25 17:34:43,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:43,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2022-11-25 17:34:43,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:43,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:43,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:43,098 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 321 flow. Second operand 3 states and 1115 transitions. [2022-11-25 17:34:43,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 447 flow [2022-11-25 17:34:43,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 419 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:43,105 INFO L231 Difference]: Finished difference. Result has 62 places, 72 transitions, 283 flow [2022-11-25 17:34:43,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=62, PETRI_TRANSITIONS=72} [2022-11-25 17:34:43,109 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2022-11-25 17:34:43,110 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 72 transitions, 283 flow [2022-11-25 17:34:43,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:43,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:43,111 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:34:43,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:43,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:43,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:34:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 48120260, now seen corresponding path program 1 times [2022-11-25 17:34:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:43,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175963372] [2022-11-25 17:34:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:43,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:43,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:43,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:34:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:43,659 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:34:43,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 17:34:43,697 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:34:43,697 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 17:34:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:43,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:34:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:43,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:34:43,862 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 17:34:43,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:43,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175963372] [2022-11-25 17:34:43,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175963372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:43,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:43,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:34:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622903025] [2022-11-25 17:34:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:43,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:34:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:34:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:34:44,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 855 [2022-11-25 17:34:44,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 283 flow. Second operand has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:44,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:44,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 855 [2022-11-25 17:34:44,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:46,245 INFO L130 PetriNetUnfolder]: 8160/10544 cut-off events. [2022-11-25 17:34:46,245 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-25 17:34:46,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21162 conditions, 10544 events. 8160/10544 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 52282 event pairs, 3963 based on Foata normal form. 0/3063 useless extension candidates. Maximal degree in co-relation 21148. Up to 10451 conditions per place. [2022-11-25 17:34:46,324 INFO L137 encePairwiseOnDemand]: 852/855 looper letters, 65 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2022-11-25 17:34:46,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 403 flow [2022-11-25 17:34:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1113 transitions. [2022-11-25 17:34:46,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43391812865497076 [2022-11-25 17:34:46,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1113 transitions. [2022-11-25 17:34:46,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1113 transitions. [2022-11-25 17:34:46,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:46,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1113 transitions. [2022-11-25 17:34:46,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:46,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:46,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:46,348 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 283 flow. Second operand 3 states and 1113 transitions. [2022-11-25 17:34:46,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 403 flow [2022-11-25 17:34:46,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:46,352 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 272 flow [2022-11-25 17:34:46,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2022-11-25 17:34:46,354 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2022-11-25 17:34:46,354 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 272 flow [2022-11-25 17:34:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:46,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:46,356 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:34:46,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Ended with exit code 0 [2022-11-25 17:34:46,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:46,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:34:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:46,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1121169588, now seen corresponding path program 2 times [2022-11-25 17:34:46,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:34:46,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459011285] [2022-11-25 17:34:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:34:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:34:46,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:34:46,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:34:46,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:34:46,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:34:46,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:34:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:46,931 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:34:46,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:34:47,200 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 17:34:47,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:48,337 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 17:34:48,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459011285] [2022-11-25 17:34:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459011285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:48,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:34:48,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:34:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367210766] [2022-11-25 17:34:48,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:34:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:34:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:34:57,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 855 [2022-11-25 17:34:57,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 272 flow. Second operand has 12 states, 12 states have (on average 337.0) internal successors, (4044), 12 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:57,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:57,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 855 [2022-11-25 17:34:57,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:02,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:04,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:06,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:08,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:11,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:13,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:15,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:17,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:35:24,814 INFO L130 PetriNetUnfolder]: 19031/24582 cut-off events. [2022-11-25 17:35:24,814 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-11-25 17:35:24,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49283 conditions, 24582 events. 19031/24582 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 132924 event pairs, 9247 based on Foata normal form. 11/7132 useless extension candidates. Maximal degree in co-relation 49268. Up to 3493 conditions per place. [2022-11-25 17:35:24,985 INFO L137 encePairwiseOnDemand]: 845/855 looper letters, 266 selfloop transitions, 40 changer transitions 0/309 dead transitions. [2022-11-25 17:35:24,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 309 transitions, 1492 flow [2022-11-25 17:35:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:35:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:35:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4349 transitions. [2022-11-25 17:35:25,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4238791423001949 [2022-11-25 17:35:25,004 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4349 transitions. [2022-11-25 17:35:25,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4349 transitions. [2022-11-25 17:35:25,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:25,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4349 transitions. [2022-11-25 17:35:25,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 362.4166666666667) internal successors, (4349), 12 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:25,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 855.0) internal successors, (11115), 13 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:25,052 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 855.0) internal successors, (11115), 13 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:25,061 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 272 flow. Second operand 12 states and 4349 transitions. [2022-11-25 17:35:25,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 309 transitions, 1492 flow [2022-11-25 17:35:25,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 309 transitions, 1491 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:25,069 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 545 flow [2022-11-25 17:35:25,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=545, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2022-11-25 17:35:25,071 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2022-11-25 17:35:25,072 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 545 flow [2022-11-25 17:35:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 337.0) internal successors, (4044), 12 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:25,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:25,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:35:25,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:35:25,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:25,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:35:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1001034788, now seen corresponding path program 1 times [2022-11-25 17:35:25,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:25,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954256493] [2022-11-25 17:35:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:25,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:35:25,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:35:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:35:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:25,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:25,578 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-25 17:35:25,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-25 17:35:25,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:25,917 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-25 17:35:25,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-25 17:35:26,191 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-25 17:35:26,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-25 17:35:26,361 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 17:35:26,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:26,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:26,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954256493] [2022-11-25 17:35:26,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954256493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:26,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:26,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:26,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836637447] [2022-11-25 17:35:26,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:26,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:26,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:27,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 855 [2022-11-25 17:35:27,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 545 flow. Second operand has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:27,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:27,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 855 [2022-11-25 17:35:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:30,721 INFO L130 PetriNetUnfolder]: 17918/23119 cut-off events. [2022-11-25 17:35:30,721 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-11-25 17:35:30,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46448 conditions, 23119 events. 17918/23119 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 123492 event pairs, 8694 based on Foata normal form. 0/6919 useless extension candidates. Maximal degree in co-relation 46424. Up to 22902 conditions per place. [2022-11-25 17:35:30,880 INFO L137 encePairwiseOnDemand]: 852/855 looper letters, 83 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2022-11-25 17:35:30,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 709 flow [2022-11-25 17:35:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:35:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:35:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1111 transitions. [2022-11-25 17:35:30,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331384015594542 [2022-11-25 17:35:30,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1111 transitions. [2022-11-25 17:35:30,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1111 transitions. [2022-11-25 17:35:30,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:30,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1111 transitions. [2022-11-25 17:35:30,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.3333333333333) internal successors, (1111), 3 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:30,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:30,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:30,897 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 545 flow. Second operand 3 states and 1111 transitions. [2022-11-25 17:35:30,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 709 flow [2022-11-25 17:35:30,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 631 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-11-25 17:35:30,903 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 465 flow [2022-11-25 17:35:30,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=465, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2022-11-25 17:35:30,905 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2022-11-25 17:35:30,905 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 465 flow [2022-11-25 17:35:30,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:30,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:30,906 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:35:30,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:35:31,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:31,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:35:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1001034787, now seen corresponding path program 1 times [2022-11-25 17:35:31,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:31,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194703646] [2022-11-25 17:35:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:31,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:31,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:35:31,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:35:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:35:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:31,467 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-25 17:35:31,468 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-25 17:35:31,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-25 17:35:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:31,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:35:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:31,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:35:31,693 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 17:35:31,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:31,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194703646] [2022-11-25 17:35:31,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194703646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:31,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:31,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:31,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904673573] [2022-11-25 17:35:31,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:31,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:35:31,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:31,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:35:31,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:35:32,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 855 [2022-11-25 17:35:32,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 465 flow. Second operand has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:32,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:32,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 855 [2022-11-25 17:35:32,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:35,348 INFO L130 PetriNetUnfolder]: 16805/21656 cut-off events. [2022-11-25 17:35:35,348 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2022-11-25 17:35:35,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43477 conditions, 21656 events. 16805/21656 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 114236 event pairs, 8141 based on Foata normal form. 0/6711 useless extension candidates. Maximal degree in co-relation 43452. Up to 21439 conditions per place. [2022-11-25 17:35:35,499 INFO L137 encePairwiseOnDemand]: 852/855 looper letters, 81 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2022-11-25 17:35:35,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 625 flow [2022-11-25 17:35:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:35:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:35:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1109 transitions. [2022-11-25 17:35:35,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4323586744639376 [2022-11-25 17:35:35,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1109 transitions. [2022-11-25 17:35:35,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1109 transitions. [2022-11-25 17:35:35,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:35,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1109 transitions. [2022-11-25 17:35:35,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,515 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 465 flow. Second operand 3 states and 1109 transitions. [2022-11-25 17:35:35,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 625 flow [2022-11-25 17:35:35,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 624 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:35,521 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 462 flow [2022-11-25 17:35:35,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2022-11-25 17:35:35,522 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2022-11-25 17:35:35,522 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 462 flow [2022-11-25 17:35:35,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:35,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:35,524 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:35,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Ended with exit code 0 [2022-11-25 17:35:35,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:35,738 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:35:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash -967321840, now seen corresponding path program 1 times [2022-11-25 17:35:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:35,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107923701] [2022-11-25 17:35:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:35,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:35:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:35:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:35:35,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:35,962 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 17:35:35,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:35,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:35,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107923701] [2022-11-25 17:35:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107923701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:35,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:35,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:35:35,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975509898] [2022-11-25 17:35:35,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:35,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:35:35,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:35:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:35:36,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 855 [2022-11-25 17:35:36,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 462 flow. Second operand has 5 states, 5 states have (on average 347.4) internal successors, (1737), 5 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:36,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:36,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 855 [2022-11-25 17:35:36,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:39,829 INFO L130 PetriNetUnfolder]: 13929/18558 cut-off events. [2022-11-25 17:35:39,829 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2022-11-25 17:35:39,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37303 conditions, 18558 events. 13929/18558 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 103439 event pairs, 7102 based on Foata normal form. 2/6518 useless extension candidates. Maximal degree in co-relation 37277. Up to 16487 conditions per place. [2022-11-25 17:35:39,963 INFO L137 encePairwiseOnDemand]: 844/855 looper letters, 111 selfloop transitions, 24 changer transitions 0/137 dead transitions. [2022-11-25 17:35:39,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 137 transitions, 850 flow [2022-11-25 17:35:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:35:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:35:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1835 transitions. [2022-11-25 17:35:39,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42923976608187137 [2022-11-25 17:35:39,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1835 transitions. [2022-11-25 17:35:39,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1835 transitions. [2022-11-25 17:35:39,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:35:39,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1835 transitions. [2022-11-25 17:35:39,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 367.0) internal successors, (1835), 5 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:39,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 855.0) internal successors, (5130), 6 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:39,984 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 855.0) internal successors, (5130), 6 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:39,984 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 462 flow. Second operand 5 states and 1835 transitions. [2022-11-25 17:35:39,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 137 transitions, 850 flow [2022-11-25 17:35:39,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 137 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:35:39,991 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 559 flow [2022-11-25 17:35:39,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2022-11-25 17:35:39,992 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2022-11-25 17:35:39,993 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 559 flow [2022-11-25 17:35:39,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.4) internal successors, (1737), 5 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:39,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:39,994 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:40,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-25 17:35:40,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:40,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:35:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 78276639, now seen corresponding path program 1 times [2022-11-25 17:35:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:35:40,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597005179] [2022-11-25 17:35:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:35:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:35:40,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:35:40,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:35:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:40,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:35:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:40,467 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-11-25 17:35:40,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 17:35:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:35:40,646 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-25 17:35:40,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-11-25 17:35:43,823 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-25 17:35:43,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-25 17:35:46,304 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 17:35:46,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:35:46,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:35:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597005179] [2022-11-25 17:35:46,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597005179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:46,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:46,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:35:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377980743] [2022-11-25 17:35:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:46,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:35:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:35:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:35:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-25 17:35:48,679 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 17:35:50,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:35:53,374 WARN L539 Checker$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 17:35:56,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:35:58,888 WARN L539 Checker$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 17:36:01,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:36:03,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:36:05,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:36:08,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:36:10,164 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 17:36:10,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 855 [2022-11-25 17:36:10,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 559 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:10,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:10,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 855 [2022-11-25 17:36:10,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:15,209 INFO L130 PetriNetUnfolder]: 15237/19532 cut-off events. [2022-11-25 17:36:15,210 INFO L131 PetriNetUnfolder]: For 1080/1180 co-relation queries the response was YES. [2022-11-25 17:36:15,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43038 conditions, 19532 events. 15237/19532 cut-off events. For 1080/1180 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 101089 event pairs, 7280 based on Foata normal form. 100/7541 useless extension candidates. Maximal degree in co-relation 43008. Up to 19369 conditions per place. [2022-11-25 17:36:15,377 INFO L137 encePairwiseOnDemand]: 852/855 looper letters, 81 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2022-11-25 17:36:15,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 719 flow [2022-11-25 17:36:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 978 transitions. [2022-11-25 17:36:15,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38128654970760234 [2022-11-25 17:36:15,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 978 transitions. [2022-11-25 17:36:15,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 978 transitions. [2022-11-25 17:36:15,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:15,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 978 transitions. [2022-11-25 17:36:15,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:15,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:15,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:15,392 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 559 flow. Second operand 3 states and 978 transitions. [2022-11-25 17:36:15,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 719 flow [2022-11-25 17:36:15,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 693 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 17:36:15,399 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 531 flow [2022-11-25 17:36:15,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=531, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2022-11-25 17:36:15,400 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2022-11-25 17:36:15,401 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 531 flow [2022-11-25 17:36:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:15,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:15,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:15,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:36:15,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:15,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:36:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash 78276641, now seen corresponding path program 1 times [2022-11-25 17:36:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:15,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418155185] [2022-11-25 17:36:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:15,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:15,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:15,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:36:15,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:36:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:15,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:36:15,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:15,954 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 17:36:15,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 17:36:15,977 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 510 treesize of output 494 [2022-11-25 17:36:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:16,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:36:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:16,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:36:16,253 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 17:36:16,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:36:16,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418155185] [2022-11-25 17:36:16,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418155185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:16,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:16,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:36:16,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802852366] [2022-11-25 17:36:16,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:16,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:36:16,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:36:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:36:17,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 855 [2022-11-25 17:36:17,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 354.6) internal successors, (1773), 5 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:17,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:17,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 855 [2022-11-25 17:36:17,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:19,830 INFO L130 PetriNetUnfolder]: 14650/18722 cut-off events. [2022-11-25 17:36:19,830 INFO L131 PetriNetUnfolder]: For 1015/1110 co-relation queries the response was YES. [2022-11-25 17:36:19,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41233 conditions, 18722 events. 14650/18722 cut-off events. For 1015/1110 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 95579 event pairs, 6997 based on Foata normal form. 95/7333 useless extension candidates. Maximal degree in co-relation 41202. Up to 18559 conditions per place. [2022-11-25 17:36:19,965 INFO L137 encePairwiseOnDemand]: 852/855 looper letters, 79 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-11-25 17:36:19,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 687 flow [2022-11-25 17:36:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1099 transitions. [2022-11-25 17:36:19,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42846003898635476 [2022-11-25 17:36:19,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1099 transitions. [2022-11-25 17:36:19,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1099 transitions. [2022-11-25 17:36:19,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:19,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1099 transitions. [2022-11-25 17:36:19,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.3333333333333) internal successors, (1099), 3 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:19,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:19,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 855.0) internal successors, (3420), 4 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:19,980 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 531 flow. Second operand 3 states and 1099 transitions. [2022-11-25 17:36:19,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 687 flow [2022-11-25 17:36:19,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:36:19,986 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 528 flow [2022-11-25 17:36:19,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=528, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2022-11-25 17:36:19,987 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2022-11-25 17:36:19,988 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 528 flow [2022-11-25 17:36:19,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 354.6) internal successors, (1773), 5 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:19,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:19,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:20,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:36:20,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:20,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:36:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1868404018, now seen corresponding path program 1 times [2022-11-25 17:36:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:20,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642531788] [2022-11-25 17:36:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:20,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:20,205 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:36:20,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:36:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:20,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:36:20,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:20,407 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 17:36:20,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:36:20,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642531788] [2022-11-25 17:36:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642531788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:20,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:20,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:36:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917539000] [2022-11-25 17:36:20,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:20,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:36:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:36:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:36:20,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 855 [2022-11-25 17:36:20,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 528 flow. Second operand has 5 states, 5 states have (on average 347.8) internal successors, (1739), 5 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:20,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:20,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 855 [2022-11-25 17:36:20,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:23,762 INFO L130 PetriNetUnfolder]: 11875/15831 cut-off events. [2022-11-25 17:36:23,762 INFO L131 PetriNetUnfolder]: For 1293/1353 co-relation queries the response was YES. [2022-11-25 17:36:23,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35380 conditions, 15831 events. 11875/15831 cut-off events. For 1293/1353 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 87714 event pairs, 6568 based on Foata normal form. 60/7105 useless extension candidates. Maximal degree in co-relation 35348. Up to 15029 conditions per place. [2022-11-25 17:36:23,880 INFO L137 encePairwiseOnDemand]: 844/855 looper letters, 95 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2022-11-25 17:36:23,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 854 flow [2022-11-25 17:36:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:36:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:36:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1817 transitions. [2022-11-25 17:36:23,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42502923976608187 [2022-11-25 17:36:23,887 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1817 transitions. [2022-11-25 17:36:23,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1817 transitions. [2022-11-25 17:36:23,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:23,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1817 transitions. [2022-11-25 17:36:23,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 363.4) internal successors, (1817), 5 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:23,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 855.0) internal successors, (5130), 6 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:23,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 855.0) internal successors, (5130), 6 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:23,894 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 528 flow. Second operand 5 states and 1817 transitions. [2022-11-25 17:36:23,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 854 flow [2022-11-25 17:36:23,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:36:23,900 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 590 flow [2022-11-25 17:36:23,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2022-11-25 17:36:23,901 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2022-11-25 17:36:23,902 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 590 flow [2022-11-25 17:36:23,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 347.8) internal successors, (1739), 5 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:23,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:23,903 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1] [2022-11-25 17:36:23,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:36:24,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:24,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:36:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash 76417101, now seen corresponding path program 1 times [2022-11-25 17:36:24,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:36:24,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855949106] [2022-11-25 17:36:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:24,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:36:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:36:24,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:36:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:36:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:24,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:36:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:24,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 17:36:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:36:24,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:36:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:26,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:36:26,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855949106] [2022-11-25 17:36:26,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855949106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:36:26,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:36:26,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2022-11-25 17:36:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042974552] [2022-11-25 17:36:26,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:36:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:36:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:36:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:36:46,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 855 [2022-11-25 17:36:46,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 590 flow. Second operand has 17 states, 17 states have (on average 329.11764705882354) internal successors, (5595), 17 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:46,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:46,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 855 [2022-11-25 17:36:46,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:52,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:36:55,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:36:58,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:37:00,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:37:17,239 INFO L130 PetriNetUnfolder]: 29853/38550 cut-off events. [2022-11-25 17:37:17,239 INFO L131 PetriNetUnfolder]: For 5542/5914 co-relation queries the response was YES. [2022-11-25 17:37:17,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93609 conditions, 38550 events. 29853/38550 cut-off events. For 5542/5914 co-relation queries the response was YES. Maximal size of possible extension queue 2058. Compared 222306 event pairs, 14678 based on Foata normal form. 376/18527 useless extension candidates. Maximal degree in co-relation 93574. Up to 8623 conditions per place. [2022-11-25 17:37:17,626 INFO L137 encePairwiseOnDemand]: 845/855 looper letters, 396 selfloop transitions, 61 changer transitions 0/462 dead transitions. [2022-11-25 17:37:17,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 462 transitions, 2681 flow [2022-11-25 17:37:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:37:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:37:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 6018 transitions. [2022-11-25 17:37:17,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41403508771929826 [2022-11-25 17:37:17,637 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 6018 transitions. [2022-11-25 17:37:17,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 6018 transitions. [2022-11-25 17:37:17,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:17,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 6018 transitions. [2022-11-25 17:37:17,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 354.0) internal successors, (6018), 17 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 855.0) internal successors, (15390), 18 states have internal predecessors, (15390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,670 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 855.0) internal successors, (15390), 18 states have internal predecessors, (15390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,670 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 590 flow. Second operand 17 states and 6018 transitions. [2022-11-25 17:37:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 462 transitions, 2681 flow [2022-11-25 17:37:17,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 462 transitions, 2612 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:17,709 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 934 flow [2022-11-25 17:37:17,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=934, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2022-11-25 17:37:17,711 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 40 predicate places. [2022-11-25 17:37:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 934 flow [2022-11-25 17:37:17,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 329.11764705882354) internal successors, (5595), 17 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:17,713 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:17,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:37:17,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:37:17,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:37:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1072054308, now seen corresponding path program 1 times [2022-11-25 17:37:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:17,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353026357] [2022-11-25 17:37:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:17,930 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 17:37:17,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:17,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:37:17,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:37:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:37:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:18,380 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:37:18,380 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 17:37:18,534 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:37:18,534 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 17:37:18,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:37:18,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:37:18,710 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:37:18,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:37:18,786 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-25 17:37:18,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:37:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:37:18,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:37:21,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:21,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353026357] [2022-11-25 17:37:21,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353026357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:21,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:37:21,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:37:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74402859] [2022-11-25 17:37:21,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:37:21,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:37:21,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:37:33,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 855 [2022-11-25 17:37:33,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 934 flow. Second operand has 12 states, 12 states have (on average 320.6666666666667) internal successors, (3848), 12 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:33,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:33,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 855 [2022-11-25 17:37:33,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:45,802 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:37:47,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:50,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:52,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:54,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:56,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:37:58,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:38:00,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:02,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:04,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:07,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:22,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:44,104 INFO L130 PetriNetUnfolder]: 74058/97437 cut-off events. [2022-11-25 17:38:44,104 INFO L131 PetriNetUnfolder]: For 14151/14511 co-relation queries the response was YES. [2022-11-25 17:38:44,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233943 conditions, 97437 events. 74058/97437 cut-off events. For 14151/14511 co-relation queries the response was YES. Maximal size of possible extension queue 5034. Compared 658051 event pairs, 29997 based on Foata normal form. 468/47283 useless extension candidates. Maximal degree in co-relation 233903. Up to 24472 conditions per place. [2022-11-25 17:38:45,176 INFO L137 encePairwiseOnDemand]: 841/855 looper letters, 381 selfloop transitions, 73 changer transitions 0/457 dead transitions. [2022-11-25 17:38:45,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 457 transitions, 2951 flow [2022-11-25 17:38:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:38:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:38:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 6787 transitions. [2022-11-25 17:38:45,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39690058479532164 [2022-11-25 17:38:45,188 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 6787 transitions. [2022-11-25 17:38:45,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 6787 transitions. [2022-11-25 17:38:45,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:45,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 6787 transitions. [2022-11-25 17:38:45,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 339.35) internal successors, (6787), 20 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 855.0) internal successors, (17955), 21 states have internal predecessors, (17955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,211 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 855.0) internal successors, (17955), 21 states have internal predecessors, (17955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,211 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 934 flow. Second operand 20 states and 6787 transitions. [2022-11-25 17:38:45,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 457 transitions, 2951 flow [2022-11-25 17:38:45,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 457 transitions, 2849 flow, removed 15 selfloop flow, removed 4 redundant places. [2022-11-25 17:38:45,319 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 1229 flow [2022-11-25 17:38:45,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1229, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2022-11-25 17:38:45,320 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2022-11-25 17:38:45,321 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 1229 flow [2022-11-25 17:38:45,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 320.6666666666667) internal successors, (3848), 12 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:45,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:45,322 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:45,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:38:45,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:38:45,524 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:38:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1072054309, now seen corresponding path program 1 times [2022-11-25 17:38:45,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:45,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823253957] [2022-11-25 17:38:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:45,524 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 17:38:45,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:45,525 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:38:45,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:38:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:45,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:38:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:45,889 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:38:45,889 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 17:38:45,940 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 17:38:45,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 17:38:45,975 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:38:45,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 17:38:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:38:46,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:46,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823253957] [2022-11-25 17:38:46,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823253957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:46,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:46,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:38:46,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531803585] [2022-11-25 17:38:46,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:46,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:38:46,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:46,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:38:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:38:46,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 855 [2022-11-25 17:38:46,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 1229 flow. Second operand has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:46,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:46,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 855 [2022-11-25 17:38:46,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:59,739 INFO L130 PetriNetUnfolder]: 52089/67902 cut-off events. [2022-11-25 17:38:59,740 INFO L131 PetriNetUnfolder]: For 71768/73633 co-relation queries the response was YES. [2022-11-25 17:39:00,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196965 conditions, 67902 events. 52089/67902 cut-off events. For 71768/73633 co-relation queries the response was YES. Maximal size of possible extension queue 3435. Compared 422265 event pairs, 26353 based on Foata normal form. 6588/41077 useless extension candidates. Maximal degree in co-relation 196920. Up to 67357 conditions per place. [2022-11-25 17:39:00,434 INFO L137 encePairwiseOnDemand]: 851/855 looper letters, 111 selfloop transitions, 12 changer transitions 0/134 dead transitions. [2022-11-25 17:39:00,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 134 transitions, 1469 flow [2022-11-25 17:39:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:39:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:39:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1406 transitions. [2022-11-25 17:39:00,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2022-11-25 17:39:00,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1406 transitions. [2022-11-25 17:39:00,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1406 transitions. [2022-11-25 17:39:00,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:39:00,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1406 transitions. [2022-11-25 17:39:00,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.5) internal successors, (1406), 4 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:00,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 855.0) internal successors, (4275), 5 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:00,444 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 855.0) internal successors, (4275), 5 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:00,444 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 1229 flow. Second operand 4 states and 1406 transitions. [2022-11-25 17:39:00,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 134 transitions, 1469 flow [2022-11-25 17:39:00,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 1384 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-11-25 17:39:00,800 INFO L231 Difference]: Finished difference. Result has 121 places, 134 transitions, 1162 flow [2022-11-25 17:39:00,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=855, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1162, PETRI_PLACES=121, PETRI_TRANSITIONS=134} [2022-11-25 17:39:00,801 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 58 predicate places. [2022-11-25 17:39:00,802 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 134 transitions, 1162 flow [2022-11-25 17:39:00,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:00,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:39:00,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:39:00,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:39:01,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:39:01,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-25 17:39:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:39:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1126068794, now seen corresponding path program 1 times [2022-11-25 17:39:01,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:39:01,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857982991] [2022-11-25 17:39:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:39:01,008 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 17:39:01,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:39:01,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:39:01,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e01834c9-301e-4c34-ac23-3057a8290c50/bin/uautomizer-ZsLfNo2U6R/mathsat -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 17:39:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:39:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:39:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:39:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:39:01,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:39:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:39:01,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:39:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857982991] [2022-11-25 17:39:01,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857982991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:39:01,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:39:01,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:39:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781453073] [2022-11-25 17:39:01,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:39:01,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:39:01,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:39:01,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:39:01,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:39:03,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 855 [2022-11-25 17:39:03,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 134 transitions, 1162 flow. Second operand has 12 states, 12 states have (on average 340.8333333333333) internal successors, (4090), 12 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:39:03,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:39:03,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 855 [2022-11-25 17:39:03,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand